Answer:
25^2
5^4
Step-by-step explanation:
625 = 25*25 = 25^2
=5*5 *5*5 = 5^4
x + y = 71.5
x = 47.8
y = 71.5 - 47.8
71.5 - 47.8 = 23.7
y = 23.7 pounds