<span>88.80625 is the answer because I used a calculator.</span>
Answers: a = 49
b = 10
c = 105
.004052
___________
76255) 309.00000
305.020
_______
4.98000
3.81275
__________
1.16725
Answer:
Step-by-step explanation:
Rationalize the denominator of b. So, multiply the numerator and denominator by 

Now, find a +b

Combine like terms

Now find (a + b)²
(a +b)² = 

Hint: 
Percent means parts out of 100
70%=70/100=7/10
7/10 of x=28
'of' means multiply
7/10 x=28
multiply both sides by 10/7 to get rid of fraciton
x=40
the number is 40