Pls help will give points

Satchi found a used bookstore that sells pre-owned dvds and cds. dvds cost $9 each, and cds cost $7 each. satchi can spend no more than $45.

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122

What is the measure of angle 1? a.28 b.152 c.168 d.64