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Svetlanka [38]
2 years ago
11

Find the area of a circle that a has a radius of 10 in. a Use 3.14 for it. 10 in. Hint: A = ttr2 Area = [?] square inches Enter

the number that goes in the green box. Do not round your answer.​

Mathematics
2 answers:
damaskus [11]2 years ago
3 0

Answer:

A≈314.16in²

A=πr2=π·102≈314.15927in²\\

Step-by-step explanation:

Alona [7]2 years ago
3 0

<u>Answer:</u>

  • The area of the circle is 314 in.²

<u>Step-by-step explanation:</u>

<u>We know that:</u>

  • Area of circle: πr²
  • r = 10 in.

<u>Work:</u>

  • πr²
  • => 3.14 x 10 x 10
  • => 3.14 x 100
  • => 314

Hence, <u>the area of the circle is 314 in.²</u>

Hoped this helped.

BrainiacUser1357

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

Your spreadsheet or graphing calculator can do this for you.

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Del ray can run 20 1/2 miles in 2 1/4 hours. How many miles per hour can he run?
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5 0
3 years ago
If 2(4x + 3)/(x - 3)(x + 7) = a/x - 3 + b/x + 7, find the values of a and b.
zmey [24]

Answer:

a=3 and b=5.

Step-by-step explanation:

So I believe the problem is this:

\frac{2(4x+3)}{x-3}(x+7)}=\frac{a}{x-3}+\frac{b}{x+7}

where we are asked to find values for a and b such that the equation holds for any x in the equation's domain.

So I'm actually going to get rid of any domain restrictions by multiplying both sides by (x-3)(x+7).

In other words this will clear the fractions.

\frac{2(4x+3)}{x-3}(x+7)}\cdot(x-3)(x+7)=\frac{a}{x-3}\cdot(x-3)(x+7)+\frac{b}{x+7}(x-3)(x+7)

2(4x+3)=a(x+7)+b(x-3)

As you can see there was some cancellation.

I'm going to plug in -7 for x because x+7 becomes 0 then.

2(4\cdot -7+3)=a(-7+7)+b(-7-3)

2(-28+3)=a(0)+b(-10)

2(-25)=0-10b

-50=-10b

Divide both sides by -10:

\frac{-50}{-10}=b

5=b

Now we have:

2(4x+3)=a(x+7)+b(x-3) with b=5

I notice that x-3 is 0 when x=3. So I'm going to replace x with 3.

2(4\cdot 3+3)=a(3+7)+b(3-3)

2(12+3)=a(10)+b(0)

2(15)=10a+0

30=10a

Divide both sides by 10:

\frac{30}{10}=a

3=a

So a=3 and b=5.

4 0
3 years ago
Read 2 more answers
Find 4 - (-11).<br> The difference is ?
Nana76 [90]

Answer:

15

Step-by-step explanation:

Step 1: distribute the negative: 4+11

Step 2: add up the numbers: 15

Hope that helps

7 0
3 years ago
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