Answer:
5 cm
Step-by-step explanation:
13² - 12² = x²
169 - 144 = x²
25 = x²
5 = x
12^5
12^5 means 12*12*12*12*12 (5 twelves)
b. c(p) = 0.42p
you are multiplying the cost (0.42) by the pounds (p)