The measurement of angle b is :59, 63, or 90

The measurement of angle f is : 59, 63 , or 90

What is the percent of increase for a population that changed from 438,000 to 561,000

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?

X^2/100+y^2/25=1 the y-intercepts are at: a) (-10,0) and (10,0) b) (0,10) and (0,5) c) (0,-5) and (0,5)