Answer:
4in² cake
Step-by-step explanation:
Given the function W (x)=0.5x^2 gives the number of servings of a wedding cake that can be obtained from a two layer X inch square wedding cake tier, to get the size needed to serve 8 people, we will substitute W(x) = 8 into the expression and find x as shown;
W(x)=0.5x^2
8 = 0.5x^2
8/0.5 = x^2
8*2 = x^2
16 = x^2
Rearrange
x^2 = 16
x = √16
x = 4 in²
Hence the size of the wedding cake needed to serve 8 people is 4in² cake
