Suppose that y varies directly as the square root of x, and that y = 45 when x=225 . What is y when x=65? Round your answer to two decimal places if necessary.

Answer 1

y = k/sqrx

45 = k/sqr225

k = 45sqr225 = 45(15) =675

y =45(15)/sqrx

y = 45(15)/sqr65 =about 83.72

y = about 83.72 when x= 65

y =675/sqrx

83.72 = 675/sqr65