Y is directly proportional to the square root of x If y = 32 when x = 64 find,
y when x = 25

Please help

y = 20

Step-by-step explanation:

Given y is directly proportional to , then the equation relating them is

y = k ← k is the constant of proportion

To find k use the condition y = 32 when x = 64, then

32 = k = 8k ( divide both sides by 8 )

4 = k

y = 4 ← equation of proportion

When x = 25, then

y = 4 = 4 × 5 = 20

the answer is  

a.

4,624π mm2

step-by-step explanation: