Find the measure of angle b. Which is the Answers?

A.107
B.73
C.17
D.163

Can you help me, I would appreciate it very much :)

Olivia is using 160 quilt squares to make a red, yellow, and blue quilt if 25% of the quilt are red and 30% are yellow how many quilt squares are blue

Lines a and b are perpendicular. if the slope of line a is 3, what is the slope of line b?

Fred and gene are hang gliding. fred is 700 feet above the ground and descending at 15 ft/s. gene is decending as shown in the table. interpret the rates of change and initial values of the linear functions in terms of the situations they model. show all work. freds equation is f(x)=-15x+700. ( genes is the table attached)