What happens to the graph of a periodic function if the amplitude, a, is between 0 and 1

What is the approximate total length of iron edging needed to create the square frame and the two diagonals?

What is the value of r of the geometric series?

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