Question

If a varies directly as the square of b, and a = 4 when b = 3, find a when b = 2

Answer 1

a = 46. Look down to find out more↓:

Explanation:

a = kb²

4 = k(3)²

4 = k9

k = 4/9

a = 4/9(9²)

a = 4/9 (81)

a = 324/9

a = 36