Which expression is 3x10^7 times as great as 2x10^-4

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?