Write the equation in standard form for the circle with center (0, -5) passing through (5/2, -11)

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Math it's appreciated. (picture provided)