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muminat
3 years ago
11

A(r) is a function that gives the area of a circle with radius r. It can be written in equation form as A(r) = 3.14r2. What is t

he value of A(5)?
A:31.40
B:78.50
C:28.14
D:246.49
Mathematics
1 answer:
Jobisdone [24]3 years ago
3 0
B: 78.50

If you plug in 5 for r, then you get  3.14 * 25, which is equal to 78.5 

Hope this helps!
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Read 2 more answers
RS=4y+4, ST=3y+4, and RT=43 <br> What is the value of y?
Shkiper50 [21]

The value of y is 5

<h3>How to determine the value </h3>

From the given line, it can be concluded that:

The segment RT is divided into RS and ST

But we have the following parameters

The length of the sides are:

  • RS=4y+4
  • ST=3y+4
  • RT=43

Since RT is RS added to ST:

We have;

RT = RS + ST

substitute the values

43 = 4y + 4 + 3y + 4

collect like terms

43 = 4y + 3y + 4 + 4

Add like terms

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43 = 7y + 8

Make '7y' subject of formula

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Make 'y' the subject of formula

y = 35/ 7

y = 5

Thus, the value of y is 5

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brainly.com/question/2437195

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