7. The formula for the area of a circle is A = nr2 . Which equation shows the formula in terms of r?

r = √A/n

Step-by-step explanation:

the formular given as the area of circle

A= nr²

now inorder to express the formula in terms of r is the same as saying that we should make r the subject of the formulae.

A= nr²

divide both sides by n

we have

A/n = nr²/n

A/n = r²

Since we are aske to express the formula interms of  r and not r²,

we are going to square both sides

A/n = r²

√A/n =( r²)²

√A/n = r

therefore

r = √A/n

answer: an 8-foot rope is tied from the top of a pole to a

stake in the ground, as shown in the diagram

below

step-by-step explanation:

answer: solve 5\cdot 2^x=2405⋅2  

x

=2405, dot, 2, start superscript, x, end superscript, equals, 240.

solution

to solve for xxx, we must first isolate the exponential part. to do this, divide both sides by 555 as shown below. we do not multiply the 555 and the 222 as this goes against the order of operations!

\begin{aligned} 5\cdot 2^x& =240 2^x& =48 \\ \end{aligned}  

5⋅2  

x

2  

x

​    

=240

=48

​

step-by-step explanation: