Answer:
72%
Hope this Helps! :)
Step-by-step explanation:
90.9^2 - 21.2^2 = b^2
8,262.81 - 449.44 = b^2
b = 88.39326897450959189749074160142
(15c + 8)(a + b).
15c·(a+b)+8·(b+a)
(a + b) is common to both parts:
= (15c + 8)(a + b).