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bekas [8.4K]
3 years ago
6

Sarah rides her horse 20 km in 2 1/2 hours. What is her average speed in kilometers per hour?

Mathematics
1 answer:
Kipish [7]3 years ago
4 0

Answer:

8

Step-by-step explanation:

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The radius of a frisbee is 5 inches. What is the circumference of the frisbee in terms of (pi)?
vaieri [72.5K]

Answer:

10π inches

Step-by-step explanation:

C = 2πr

C = 2π(5)

C = 10π ≈ 31.42

4 0
3 years ago
A map scale is 1:10000. If a building is 1.2cm on a map, how big is it in real life in metres?
Maslowich

Answer:120meters

Step-by-step explanation:

5 0
3 years ago
If John takes 2 hours to travel 20km,how many kilometers does he travel in 6 hours?
Scilla [17]

Answer:

60km

Step-by-step explanation:

There are two ways to look at this

1. Finding the unit rate

We can find how many km he travels in 1 hour by diving both the hours and km by 2. 1 hour = 10km so 6 hours is 60km since we multiply by 6.

2. Multiply by 3

We can multiply both the km and hours by 3, since 2x3=6 hours

20km * 3 hours = 60km

4 0
2 years ago
Read 2 more answers
Here is a semi circle of radius x the perimeter of the shape is the shape of 25.71cm calculate the value of the radius x
NeX [460]

Answer:

5 cm

Step-by-step explanation:

Perimeter of a semicircle is :

P = πr + 2r

P = r(π + 2)

25.71 = r(3.14 + 2)

25.71 = r(5.14)

Divide both sides by 5.14

25.71 / 5.14 = r(5.14) / 5.14

5.0019455 = r

Hence, radius of semicircle = 5 cm

3 0
3 years ago
Write 2^8 * 8^2 * 4^-4 in the form 2^n
Eva8 [605]

The given expression 2^8 * 8^2 * 4^-4 can be written in the exponential form 2^n as 2^6.

<h3>What are exponential forms?</h3>

The exponential form is a more convenient way to write repetitive multiplication of the same integer by using the base and its exponents.

<u>For example:</u>

If we have a*a*a*a, it can be written in exponential form as:

=a^4

where

  • a is the base, and
  • 4 is the power.

The power in this format reflects the number of times we multiply the base by itself. The exponent is also known as the index or power. 

From the information given:

We can write 2^8 * 8^2 * 4^-4 in form of 2^n as follows:

\mathbf{= 2^8\times (2^3)^2 \times (2^2)^{-4} }

\mathbf{= 2^8\times (2^6) \times (2^{-8}) }

\mathbf{= 2^{8+6+(-8)}}

\mathbf{= 2^{6}}

Therefore, we can conclude that by using the exponential form, the given expression 2^8 * 8^2 * 4^-4 in the form 2^n is 2^6.

Learn more about exponential forms here:

brainly.com/question/8844911

#SPJ1

4 0
2 years ago
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