Aquantity x varies directly with y and inversely with z. which expression represents the constant of variation, k?
a) xz/y
b) xy/z
c) z/xy
d) y/xz

ANSWER



EXPLANATION

If quantity x varies directly with y and inversely with z.

The we can write the mathematical statement,



We introduce the constant of proportionality k, to obtain,



We now solve for k, by multiplying through by



This implies that,



The correct choice is A.

When i did the math i got 11 cm