Question

Pls help me with the blanks and the questions c,d and e...pls help asap...answer needed urgently...

tia

Answer 1

(a) no

(b) yes

(c) y = 900/x^2

(d) 400

(e) about 9.49 m

Explanation:

(a) When x and y are inversely proportional, their product is a constant.

1·900 ≠ 2·225, so x and y are not inversely proportional

(b) When x^2 and y are inversely proportional, their product is a constant.

1^2·900 = 2^2·225 = 3^2·100, so x^2 and y are inversely proportional

(c) The result from (b) tells you

x^2·y = 900

or

y = 900/x^2

(d) For x=1.5

y = 900/1.5^2 = 900/2.25 = 400

(e) For y = 10

10 = 900/x^2

x^2 = 900/10 . . . . multiply by x^2/10

x = √90 ≈ 9.49 . . . meters