A teacher asked four students to estimate the length of a grain of rice. Jack answered 4.5 x 10^-3 kilometer, Lilly answered 4.5 x 10^-3meter, Diego answered 4.5 x 10^-3vcentimeter, and Willa answered 4.5 x 10^-3 millimeter. Who gave the best answer

Answers

Answer 1

Answer:

Lilly

Step-by-step explanation:

According to the literature, the length of a medium grain rice is between 5.3 and 5.9 mm. Let's take the average (5.6 mm) and convert it to meters to compare it with the estimations. We will use the conversion factor 1 m = 1000 mm.

5.6 mm × 1 m/1000 mm = 5.6 × 10⁻³ m

Jack answered 4.5 × 10⁻³ kilometers. We will convert it to meters using the conversion factor 1 km = 1000 m.

4.5 × 10⁻³ km × 1000 m/1 km = 4.5 m

Lilly answered 4.5 × 10⁻³ meters.

Diego answered 4.5 × 10⁻³ centimeters. We will convert it to meters using the conversion factor 1 m = 100 cm.

4.5 × 10⁻³ cm × 1 m/100 cm = 4.5 × 10⁻⁵ m

Willa answered 4.5 × 10⁻³ millimeters. We will convert it to meters using the conversion factor 1 m = 1000 mm.

4.5 × 10⁻³ mm × 1 m/1000 mm = 4.5 × 10⁻⁶ m

As we can see, Lilly gave the best answer (same order of magnitude).


Related Questions

solving equations

x-1=19

Answers

Answer:

x=20

Step-by-step explanation:

x-1 = 19

Add 1 to each side

x-1+1 = 19+1

x=20

Answer:

x = 20

Step-by-step explanation:

x - 1 = 19

Add 1 to both sides

x = 20

Find the value of x and y.

Answers

Answer:

x=34[tex]\sqrt{2}[/tex]

y=34[tex]\sqrt{3}[/tex]

Step-by-step explanation:

find the area of the figure. (picture)
2in
2in
3in
2in
5in

Answers

Answer:

29 in.²

Step-by-step explanation:

2 in. × 2 in. = 4 in.²

3 in. × 5 in. = 15 in.²

2 in. × 5 in. = 10 in.²

4 in.² + 15 in.² + 10 in.²

29 in.²

Which statement is true about every rectangular pyramid? Each lateral face has an area less than the area of the base. At least two of the lateral faces are congruent. Each lateral face has the same height. At least one of the faces has a whole number base or height.

Answers

Answer:

B is correct

Step-by-step explanation:

Which equation best describes the situation below?
5 less than a number is 15.

Answers

Let the number is X

So the equation will be X-5 = 15


[tex] \sqrt{91 + 9} [/tex]
need help please ​

Answers

You would add 91+9 and you would get 100. You would then square root the 100 and get 10

What is the solution to this equation? log6(x) + log6(3) = log6( x+1)

Answers

Answer:

A

Step-by-step explanation:

got it right

The solution to this equation log₆(x) + log₆(3) = log₆( x+1) is x = 1/2.

What is a logarithm?

A logarithm is an exponent or power to which a base must be raised in order to produce a given number. If aˣ = n, then x is the logarithm of n to the base a, which is expressed mathematically as x = logₐn.

How to solve this problem?

We know that logₐx + logₐy = logₐ(xy)

Here, log₆(x) + log₆(3) = log₆( x+1)

i.e. log₆(3x) = log₆( x+1)

i.e. 3x = x + 1

i.e. 3x - x = 1

i.e. 2x = 1

i.e. x = 1/2

Therefore, the solution to this equation log₆(x) + log₆(3) = log₆( x+1) is x = 1/2. So, option A is correct.

Learn more about logarithm here -

https://brainly.com/question/88362

#SPJ2

What are the angles labeled ?

Answers

Answer:

90° angle

Step-by-step explanation:

Every time you see an angle that has a box, it measures 90°

I believe it’s a 90 degree angle

OMG last one please help

Answers

Answer:

m<D = 14

Step-by-step explanation:

Exterior angles thm:

83 + 6x - 4 = 21x + 4

6x + 79 = 21x + 4

6x - 21x = 4 - 79

-15x = -75

x = 5

m<D:

6x - 4

6(3) - 4

18 - 4

14

PLEASE HELP!! SHOW STEPS FOR BRAINLIEST! Pythagorean theorem BASED question:

An artist joined three square regions at their
vertices to create the figure shown in the diagram.

The artist will use small congruent square tiles to
cover each region without any gaps or overlaps.
Based on the information, which statement is true?

A. The number of tiles needed to cover Region X
is the same as the number of tiles needed to
cover both Region Y and Region Z.

B. The number of tiles needed to cover Region Y
is the same as the number of tiles needed to
cover both Region X and Region Z.

C. The number of tiles needed to cover Region Z
is the same as the number of tiles needed to
cover both Region X and Region Y.

D. None of these

Answers

This is a classic proof of the Pythagorean Theorem!

Pythagorean theorem is a^2 + b^2 = c^2. With a square, its area is its side length squared. Therefore, if we think about this as squares, then the sum of the area of square X and square Y will be equal to the sum of square Z.

Looking at your answer choices, the best option is C - The number of tiles needed to cover Region Z is the same number of tiles needed to cover both Region X and Region Y.

Hope this helps!! :)

HELPPPP ME PLSSS DUE IN 10 MINS FOR 20 POINTS

There are 4 blue tiles and 6 red tiles with the letter A written on them in a bag. In the same bag, there are 2 red tiles and 8 blue tiles with the letter B written on them. What is the probability that a randomly selected tile has the letter B or is blue? Give your final answer as the nearest whole percent.

Answers

Answer:

70%

Step-by-step explanation:

4 blue tiles A

6 red tiles A

2 red tiles B

8 blue tiles B

total: 20

total B: 2 + 8 = 10

total blue, not B: 4

p(B or blue) = (10 + 4)/20 = 0.7 = 70%

Check all that apply. is the reference angle for:
A.
1277
4
B.
1577
4
D C
1977
4
D.
777

Answers

Answer:

B. C. and D.

Step-by-step explanation:

need help with this question​

Answers

Answer:

n = 12.5t

Step-by-step explanation:

add up the calories burned in both days

275 + 450 = 725

add up the minutes running on both days

22 + 36 = 58

divide calories by minutes

725 calories/58 minutes = 12.5 calories/1 minute

So 12.5 multiplied by any number of minutes tells you how many calories you burned

The number of calories you burned is dependent on the number of minutes you ran.

¿Cómo se mide el grado de una ecuación algebraica?

Answers

Answer: El grado de una ecuación lo marca el monomio (o término) de mayor grado absoluto. 5x + 3 = 2x + 1 Ecuación de primer grado (cada término posee solo una incógnita y su exponente es uno) . 5x + 3 = 2x 2 + x Ecuación de segundo grado.

find the surface area of a square based pyramid with a side length of 5cm and a slant height of 5cm

Answers

Answer:

Step-by-step explanation:

The surface area of a square pyramid = 1/2 * slant height * base perimeter + area of base

 The slant height is 5 cm

The base perimeter is 4 * 5 cm = 20 cm

The area of the base is 5 cm * 5 cm = 25 cm**2

Plugging into the formula the area =

 

1/2 * 5 cm * 20 cm + 25 cm**2 =

5 cm * 10 cm + 25 cm**2 =

50 cm**2 + 25 cm**2 = 75 cm**2

where would the line y=x+7 cross the y axis? how do you know?

Answers

it would cross at (0,7) because the 7 in the equation is the y-intercept.

Answer:

At point (0, 7)

Step-by-step explanation:

The line crosses with y-axis when x = 0:

y = 0 + 7 = 7

The y-intercept is the required point and its coordinates are (0, 7)

What is the slope of the line ?

Answers

Answer:

B. ½

Step-by-step explanation:

____________________

the sum of two consecutive number is 15. the number are and solve ​

Answers

By Question it's given that the sum of two numbers is 15 . And we need to find out the numbers. So ,

Let us take :-

First number = x Second number = x + 1

According to the Question :-

[tex]\sf\implies x + x +1=15\\\\\sf\implies 2x = 15-1\\\\\sf\implies 2x =14 \\\\\sf\implies x =14/2 \\\\\sf\implies\red{ x = 7 }[/tex]

Therefore :-

First number = 7 Second number = 8

Hence the two numbers are 7 and 8.

solve:
[tex] \sqrt{x} + \sqrt{5 + x} = 15 \div \sqrt{5 + x} [/tex]

Answers

x = 4

Explanation:

sqrt(x) + sqrt(5 + x) = 15 / sqrt(5 + x)

sqrt(5 + x)[sqrt(x) + sqrt(5 + x)] = 15

sqrt(5x + x^2) + 5 + x = 15

sqrt(5x + x^2) = 10 - x

Take square of both sides

5x + x^2 = (10 - x)^2

5x + x^2 = 100 - 20x + x^2

Cancel x^2

5x = 100 - 20x

25x = 100

x = 4

Pls help kendjehdjjekekebwvujfjej

Answers

Answer:

B. 4n²+11n-6

Step-by-step explanation:

________________

What is 25% of 40? OА. 10 O B. 15 O C. 20 OD. 25​

Answers

Answer:

10 Sorry if wrong!

Step-by-step explanation:

40×0.25=10

Answer:

25/100 x 40 = 10

Step-by-step explanation:

The keyword 'of' means multiplication

Consider a percent out of 100, a way to remember is that the root word 'cent' means 100.

A jar of 150 marbles costs $4.50. If the cost varies directly with the number of marbles in the
jar, what should a jar of 250 marbles cost?

Answers

250 Marbles cost $7.50

4.50/150=0.03
0.03x250=7.5

which number represents 4%

400
40
0.4
0.04​

Answers

Answer:

0.04

Step-by-step explanation:

a manufacturer made a profit of 60% when he sold each plate for $10. calculate the cost of manufacturing each plate ​

Answers

Answer:

160:10

100:x

160x=1000

x=1000/160

x= $6.25

-8 * 2/3 answer as a fraction

Answers

Answer:

-8 x 2/3

=–16/3.

or -5⅓

Have a great day!

BRANLIEST PLZZZ Let us say you live in the United Sates and will be vacationing in Canada for 2 months. Discuss all the unit conversions you will need in order to make your stay safe and successful. (List all the units that are different in Canada – and what conversions you would need so that you can make sense of them.)

Answers

Answer:

take care everyone be safe

stay home , stay safe

take vaccination

What is the percent decrease from 25 to 15?

Answers

60%
------------------
Set up, cross multiply:

Answer: 40%

Step-by-step explanation:

I took the k12 test lol

I need help looking for the answer,but is my answer correct.

Answers

I got y = 2x + 12 because the question is only looking for the cost of Fitness Fest, not Gerry’s Gym.
The answer will be 2x=12

???????????????????????????????????????????

Answers

Answer:

C

Step-by-step explanation:

A color wheel is divided into 6 equal pieces.

Select all of the true statements about the pieces of the color wheel. A.
Two pieces have a total of 180°.

B.
Four pieces turn through 240 one-degree angles.

C.
Two 90° angles can fit into 3 pieces of the color wheel.

D.
Two pieces have a total angle measure of 90°.

E.
Each piece has an angle measure of 60°.

Answers

Answer:

B,C,E your welcome

Step-by-step explanation:

Answer: b e and c hope this was useful

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