Answer:
14 is answer c and 15 is b but I'm not expert
Step-by-step explanation:
for 14 plug area into the area equation and solve for r. most difficult part here is you have to know to take the square root to eliminate the square exponent. then plug r into the circumference equation to find answer. for 15 you know length is 1/3 of h so let's say l=h/3 and plug in all our values here so find h. 187.5=2.5*h*h/3 so 75=h*h/3 let's multiply it out to say h^2/3 and then multiply 3 over so 225=h^2 and again with the sqrt so h=15
