To calculate the surface area of a sphere, you have to use the following formula:
[tex]SA=4\pi r^2[/tex]Where "r" is the radius of the sphere.
We know that the diameter of the sphere is d = 60 inches and that the radius is half the diameter, then the radius can be determined as follows:
[tex]\begin{gathered} r=\frac{d}{2} \\ r=\frac{60}{2} \\ r=30in \end{gathered}[/tex]Once the radius is calculated, you can determine the surface area of the sphere:
[tex]\begin{gathered} SA=4\pi(30^2) \\ SA=4\pi\cdot900 \\ SA=3600\pi\approx11309.73in^2 \end{gathered}[/tex]The surface area of the sphere is 3600π in², expressed as a decimal value, the surface area is equal to 11309.73 in²
Can someone please help me on question 42 (7th grade math) pls and thank u :)
Answer:
Answer down below!
Step-by-step explanation:
(Part a):
So we have the information that after 20 minutes, the submarine descended 480 feet.
To find how many feet it descended per minute, all we need to do is divide 480 and 20 which will give us 24
Every 1 minute, the submarine descended 24 feet.
(Part b):
Now that we have how many feet it descended per minute, we have to make an expression that goes along with it.
Our unknown variable in this case will have to have to be the feet.
We can use the letter f to express that. We can also use the letter m to express our minutes in the end
So after 24(f) = m
(Part c):
After 5 Minutes: 120 ft
After 10 Minutes: 240 ft
After 15 Minutes: 360 ft
After 18 Minutes: 432 ft
what is 1+13⋅2+52−3+15−3
Answer:
88
Step-by-step explanation:
multiply 13 by 2 = 26
then add by 1 52 and 15
= 94
then subtract 94-6
88
Remember use Dmas while solving
Please help asap
Word definitions you can use
Rigid Transformations
Sequence of Transformations
Translations (slide) -
Reflection (flip)
The best description for the sequence of transformation used is; Rigid Transformations.
What is the type of transformation?
In mathematics, a rigid transformation is defined as a geometric transformation of a defined Euclidean space that does not change or preserves the Euclidean distance that is between every pair of points. Examples of this rigid transformations are rotations, translations, reflections e.t.c
Now, from the given transformation, the first thing to notice is that the transformation does not change the distance between pair of points in the diagram. Secondly, it is neither only a translation nor reflection as it is more than one transformation that was used and so it can be described as a rigid transformation.
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Determine the quotient of
3/7 divided by 2/3
Given that f(x)=2x + 1 and g(x)=3x-1/2x+1
(a) evaluate f(1/2) and g(-1)
Answer:
a)
f(1/2) = 2
g(-1) = -3/2
Step-by-step explanation:
for f(x) = 2x + 1 substitute the x with 1/2
2(1/2) + 1 then solve
1+1
2
for g(x) = 3x - 1/2x + 1 substitute with -1
3(-1) - 1/2(-1) +1 then solve
-3 + 1/2 + 1
-3/2
Describe and correct the error a student made when graphing y + 5 = - 3/4 (x - 8).
The student's first error was in step 1.
Step 1 should involve plotting a point at (0, 1).
Step 2 should involve plotting a point 3 units down and 4 units right from the point in step 1, at (4, -2).
Step 3, connecting the points with a line was correct.
In this question, we have been given an equation of line y + 5 = - 3/4 (x - 8)
We need to describe and correct the error a student made when graphing y + 5 = - 3/4 (x - 8).
Consider given equation.
y + 5 = - 3/4 (x - 8)
y + 5 = - 3/4 x - (-3/4) 8
y + 5 = -3/4 x + 6
y = (-3/4)x + 6 - 5
y = -3/4 x + 1
Here,
slope(m) = (-3/4)
and y-intercept (c) = (0, 1)
Therefore, the student's first error was in step 1.
Step 1 should involve plotting a point at (0, 1).
Step 2 should involve plotting a point 3 units down and 4 units right from the point in step 1, at (4, -2).
Step 3, connecting the points with a line was correct.
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Pablo invested in a savings bond for 3 years and was paid simple interest at an annual rate of 4%. The total interest that he earned was
$48. How much did he invest?
If necessary, refer to the list of financial formulas.
Answer:
400
Step-by-step explanation:
=
1
We know that:
3 R=4% 1 = 48
T =3 R = 4% into formula 48 2 Substitute
1=Prt
48= Prt
Solve the equation:
3 × 0.04x= 48
3
X = 400
so Pablo invested 400$
suppose that we want to generate the outcome of the flip of a fair coin, but that all we have at our disposal is a biased coin that lands on heads with some unknown probability p that need not equal to 1 2 . consider the following procedure for accomplishing your task
The probability of getting heads is 1/2 which typically implies that the coin is fair. NO, procedure (b) does not give a fair coin flip outcome.
Given that, we want to generate the outcome of the flip of a fair coin, but that all we have at our disposal is a biased coin which lands on heads with some unknown probability p that need not be equal to1/2.
What is the probability?Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true.
The following procedure for accomplishing our task are:
1. Flip the coin.
2. Flip the coin again.
From here will know that the coin is first flipped twice
3. If both flips land on heads or both land on tails, it implies that we return to step 1 to start again. this makes the flip to be insignificant since both flips land on heads or both land on tails
But if the outcomes of the two flip are different i.e., they did not land on both heads or both did not land on tails , then we will consider such an outcome.
Let the probability of head = p
so P(head) = p
the probability of tail be = (1 - p)
This kind of probability follows a conditional distribution.
Therefore, the probability of getting heads is 1/2 which typically implies that the coin is fair. NO, procedure (b) does not give a fair coin flip outcome.
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"Your question is incomplete, probably the complete question/missing part is:"
Suppose that we want to generate the outcome of the flip of a fair coin, but that all we have at our disposal is a biased coin which lands on heads with some unknown probability p that need not be equal to1/2. Consider the following procedure for accomplishing our task:
1. Flip the coin.
2. Flip the coin again.
3. If both flips land on heads or both land on tails, return to step 1. 4. Let the result of the last flip be the result of the experiment.
(a) Show that the result is equally likely to be either heads or tails.
(b) Could we use a simpler procedure that continues to flip the coin until the last two flips are different and then lets the result be the outcome of the final flip?
) To stay healthy, Emily decided to walk for 4
5
mile every
day. She walked 2
5
mile to work and walked 1
4
mile at
lunchtime. How much more does she need to walk after
dinner if she wants to meet her target distance?
If she wants to meet her target distance 3/20 steps need to be taken.
Emily made the decision to walk 4/5 kilometers every day in order to keep healthy. She walked a distance of 2/5 miles to work and a distance of 1 mile for lunch.
The desired range is 4/5 miles.
walked for 2/5 miles and for 1/4 miles.
Total miles walked is [tex]\frac{2}{5} + \frac{1}{4}[/tex]
= [tex]\frac{13}{20}[/tex]
Mileage walked overall is +
LCD is 20
add the fractions after matching the denominators
The desired range is 4 to 5 miles.
Now deduct the distance you walked from the goal distance.
[tex]\frac{4}{5} - \frac{13}{20} \\\\\frac{16}{20} - \frac{13}{20} \\\\\frac{3}{20}[/tex]
the required walking distance is 3/20
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Johnny was building a tree house. The boards for the floor are 8.89 centimeters wide. He will use 18 boards to cover the floor. How wide is the floor of the treehouse?
Answer:
1422.5778
Step-by-step explanation:
8.89x8.89=79.0321. 79.0321x18=1422.5778
The Great Games Company sells 9/20 of its games through its online store. What percent of the games are sold online?
If the Great games company sells 9/20 of its games through its online stores, then the percentage of the games are sold online is 45%
The fraction of games sells through the online store = 9/20
Here we have to convert the simple fraction to the percentage
Simple fraction is a fraction that consist of whole number numerator and denominator. The top term in the simple fraction is called the numerator and bottom term is called denominator
The percentage is defined as the number that is expressed as the fraction of 100. It is represented by the percentage sign "%"
To convert simple fraction to percentage, multiply the simple fraction by 100
The percent of games are sold online = (9/20)×100
= 45%
Hence, if the great games company sells 9/20 of its games through its online stores, then the percentage of the games are sold online is 45%.
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Find two functions F and G such that (f°g) (x) = h(x).
This operation is equivalent to:
[tex](f\circ g)(x)=f(g(x))[/tex]It is like a function inside a function. So, we can look for parts in h(x) that are common and call that the function inside.
As we can see, h(x) have terms with x + 4, so if we call:
[tex]g(x)=x+4[/tex]We can see that h(x) becomes:
[tex]h(x)=(g(x))^2+2g(x)[/tex]And if we substitute g(x) by x, we will get the expression of the ouside function f(x):
[tex]f(x)=x^2+2x[/tex]This way, we have:
[tex](f\circ g)(x)=(g(x))^2+2g(x)=(x+4)^2+2(x+4)=h(x)[/tex]So, the functions are:
[tex]\begin{gathered} g(x)=x+4 \\ f(x)=x^2+2x \end{gathered}[/tex]Help me I need help because I need help
Answer:
6.3 * 10^3
Step-by-step explanation:
6.3 * 10^3
:]
1/2 - 9/4x = -2/3 solve for x and simplify your answer as much as possible
Hello!
So, we are given the following to solve:
[tex]\frac{1}{2}- \frac{9}{4}x=- \frac{2}{3}[/tex]
To solve this, subtract [tex]\frac{1}{2}[/tex] from both sides.
[tex]\frac{1}{2} -\frac{9}{4}x- \frac{1}{2} =-\frac{2}{3} -\frac{1}{2}[/tex]
Simplify.
[tex]-\frac{9}{4}x= -\frac{7}{6}[/tex]
Multiply both sides by 4.
[tex]4(-\frac{9}{4}x)=4(-\frac{7}{6})[/tex]
Simplify.
[tex]-9x=-\frac{14}{3}[/tex]
Divide both sides by -9.
[tex]\frac{-9x}{-9}= \frac{-14/3}{-9}[/tex]
Finally, simplify.
[tex]x=\frac{14}{27}[/tex]
Hope this helps!
Intelligence Quotient (IQ) scores are often reported to be normally distributed with 100.0 and standard deviation = 15.0. A random sample of 57 people is taken.
What is the probability that the mean IQ score of people in the sample is less than 987 Round your answer to 4 decimal places, if necessary.
A measure of the probability that the sample's average IQ is below 987 is 44.70 %.
Why are z-scores important?The Z-score quantifies the discrepancy between a given value and the standard deviation. The Z-score, also known as the standard score, indicates how many standard deviations a specific data point deviates from the mean.
Do z scores have p values?The Z-standard score's deviation measure, which the p-value is, can be regarded of as a percentile expression. So they do have p-values.
Given: IQ scores are frequently described as having a normal distribution with a mean of 100.0 and a standard deviation of 15.0. A sample of 57 persons is chosen at random.
Z-score = (X- μ)/σ
= (98-100)/15
= -0.1333
P value for this z score equals 0.4470 which is 44.70 %
Therefore, the probability that the average IQ of the sample's population is lower than 987 is 44.70 %.
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Trigonometry Question!
Second Question: Calculate the value of X.
Show work needed.
Answer:
0.026 is the value of x.
Step-by-step explanation:
sinx=p÷h
sinx=5.3÷8.2
sinx=sin0.02......
x=0.02°
A pendulum is 45cm long. When the pendulum swings it travels along the arc of the circle and covers a distance of 27.5cm. Calculate the size of the angle which the pendulum travels.
The angle which the pendulum travels is 0.61 radian
What is central angle of circle ?Two parallel, identical bases connected by a curving surface form a 3D solid shape known as a cylinder. Similar to a disk in shape, these bases. The axis of the cylinder shape is a line drawn through the middle of, or connecting, two circular bases.
Given that :A pendulum is 45cm long. When the pendulum swings it travels along the arc of the circle and covers a distance of 27.5cm.
Central Angle =[tex]\frac{length of arc}{Radius}[/tex]
= [tex]\frac{27.5}{45}[/tex]
=0.61 radian
The angle which the pendulum travels is 0.61 radian
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Hilda went hiking and used the app on her phone to track her progress. When she looked back, she discovered she had hiked up 530 feet, down 602 feet, up 1003 feet, and down 89 feet to get to the lake. What is her elevation in relation to where she started?
The elevation is 848 feet.
What is meant by elevation?The word elevation is often used to describe locations on the surface of the Earth, whereas altitude or geopotential height is used to describe locations above the surface, such as those of flying aeroplanes or orbiting satellites, and depth is used to describe locations below the surface.
A geographical feature's elevation is determined by how high it is above the mean sea level (MSL). Accordingly, elevation is the distance between the height that corresponds to the ocean's surface and the top of the feature.
Given:
Hilda hiked up 530 feet,
down 602 feet,
up 1003 feet,
and down 89 feet to get to the lake.
Taking all similar cases together
Hiked up
= 530 + 1003
= 1533 feet
and, hiked down
=602+83
= 685
Thus, the elevation is
= 1533 - 685
= 848
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please I need the asnwers with explanation as soon as possible
f(x) = 1x g(x) = x − 4 Can you evaluate (g ○ f)(0)?
The evaluation of the composite function (g o f)(0) is -4
How to solve composite function?A composite function is generally a function that is written inside another function.
Therefore, let's solve the composite function below:
f(x) = 1x
g(x) = x - 4
Let's find (g o f)(0)
Therefore,
(g o f)(x) = g(f(x))
Hence,
(g o f)(0) = g(f(0))
f(0) = 1(0) = 0
Therefore, let's substitute f(0) in g(x)
(g o f)(0) = 0 - 4
(g o f)(0) = - 4
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which equation describes the line that is perpendicular to y=1/3x+2
Answer:
y= -3x+1
Step-by-step explanation:
x3 + 11x2 – 3x – 33 by grouping
Answer:
-3
Step-by-step explanation:
It was quite easy
Answer:
Step-by-step explanation: factor out x2
from the expression x2 (x+11) -3x-33
Factor out-3 from the expression x2 (x-+11) -3(x+11)
Factor out x+11 your solution is x2 (x+11) (x-3).
b. If Mark stays where he is and Mandy walks to him, how far must she walk?
Mandy must to walk a distance of 24.73 units towards Mark.
Given:
Mark is standing at 35th Street and 21st Avenue, so his location can be determined using the coordinates (35,21)
Mandy is positioned at 59th Street and 15th Avenue, hence her position's coordinates are as follows: (59,15).
We must now determine the distance Mandy must travel if Mark stays where he is and walks to meet him.
We can use the distance formula to determine this:
D = [tex]\sqrt{(x_{2}-x_{1} )^{2} + (y_{2} -y_{1})^{2} } }[/tex]
Here,
(x₁, y₁) = (35, 21)
(x₂, y₂) = (59, 15)
Then,
D = [tex]\sqrt{(59-35)^{2}+(21-15)^{2} }[/tex]
D = [tex]\sqrt{24^{2} +6^{2} }[/tex]
D = [tex]\sqrt{576+36}[/tex]
D = √612
D = 24.73
That is,
Mandy must to walk a distance of 24.73 units towards Mark.
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1
10
To solve this problem, ask the question
= ?
How many tenths are in 4/5?
How many fifths are in 1/10?
How many tenths are in 1/5?
How many fifths are in 5?
There are 8 tenths in 4/5, There are five fifths in 1/10, there are 2 tenths in 1/5, there are 25 fifths in 5.
What is tenths and fifths?The digit that follows the decimal has the place value of tenth. It stands for the digit's 1/10 position.
The fifth of a number is obtained by multiplying five occurrences of the number n together: n5 = n n n n. A number's fourth power or its square by its cube can likewise be used to create fifth powers.
a) Given 4/5, multiply the numerator and denominator by 2 to obtain the tenths. We get =4/5 2/2 =8/10 =8(1/10). Similarly, in 1/5, calculate the tenths in 1/5.
c) 525/25 = 25 is the fifth in 5.
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Dale has 33 carnival tickets. Its costs 7 tickets to ride the roller coaster. How many rides can he take?
Write the answer in the blank.
What number is 350 more than 400?
Answer:
Step-by-step explanation:
We are looking for a new number which is 350 more than 400.
We will get the new number by adding 350 to 400.
We write it down as:
400+350=750
Therefore your answer is; 750
Answer: 750
Step-by-step explanation: You add both of them 350+400...
10.8 divided by 0.09
Answer: 120
Step-by-step explanation:
[tex]\displaystyle\\10.8:0.09=\\\\\frac{10.8}{0.09}=\\\\\frac{10.8(100)}{0.09(100)}=\\\\\frac{1080}{9} =\\\\\frac{9(120)}{9}=\\\\120[/tex]
What is m
Enter your answer in the box.
A=(3x-35)
B=(x-35)
c=x
The measure of angle A is found as 115 degrees.
What is described as the term triangles?A triangle is a 2-dimensional closed shape with three sides, three angles, and three vertices. A triangle is a type of polygon.A triangle is made up of three sides. The sides of triangle ABC are AB, BC, and CA.The angle made by any 2 sides of a triangle, signified by the symbol, is the angle of the triangle. There are three angles in a triangle. ABC, BCA, and CAB are the 3 angles of a triangle ABC. These angles also are known as B, C, and A, in that order.A vertex is the point at which two sides of such a triangle intersect. There are three vertices in a triangle. The vertices of triangle ABC are A, B, and C.For the given question, the values of the angles are given.
A=(3x-35)
B=(x-35)
c=x
We know that the sum of all angles in a triangle is 180.
A + B + C = 180
Put the values;
3x-35 + x-35 + x = 180
Simplifying;
5x - 70 = 180
5x = 250
x = 50
Put the values in the angles;
Angles A = 3×50 - 35
Angles A = 115
Thus, the measure of angle A is found as 115 degrees.
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Which phrase best describes the graph of this equation? 3x+3y^2+6y+3=0
The screenshot has the answer!!
The parabola with vertex (-1, 0), focus (-1/4, -1) and directrix x = 1/4. Therefore, option C is the correct answer.
The given equation is 3x+3y²+6y+3=0.
What is the parabola?An equation of a curve that has a point on it that is equally spaced from a fixed point and a fixed line is referred to as a parabola. The parabola's fixed line and fixed point are together referred to as the directrix and focus, respectively.
Graph the parabola using the direction, vertex, focus, and axis of symmetry.
Direction: Opens Left
Vertex: (0, -1)
Focus: (-1/4, -1)
Axis of symmetry: y=-1
Directrix: x = 1/4
The coordinate points to plot (2, 0.41), (-2, -2.41), (-1, 0), (-1, -2) and (0, -1).
The parabola with vertex (-1, 0), focus (-1/4, -1) and directrix x = 1/4. Therefore, option C is the correct answer.
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DONT IGNORE PLEASE HELP
Answer:
y = 5
Step-by-step explanation:
the equation of a horizontal line, parallel to the x- axis is
y = c ( c is the value of the y- coordinates the line passes through )
the line passes through (- 5, 5 ) and (0, 5 ) with y- coordinates 5 , then
y = 5 ← equation of line