Values of a and b

Question

A circle with equation x2+y2=125. (a,5) and (9,b) are points on the circle. What are possible values of a and b

Answer 1

 x²+y²=125. (a,5) and (9,b)

for a

x²+5²=125

x²+25=125

x²=100

x=10=a

for b

9²+y²=125

81+y²=125

y²=44

y=6.6=b

Answer 2

a piece of cargo weighs 550kg and its dimensions is 15.m x 1.6m x 3.4m. compute the airfreight cost for this cargo given that the freight rate from the origin airport to the destination airport is £10.00 per 5kg.