The diagram shows a garden.
It is made up of a square of side 16 m and four semicircles of radius 8 m.
Calculate (a) the perimeter of the garden,

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

Can someone me and do the problem plz so i can understand it more better

Equation for the calculation double 2 and then add 5