Abicycle wheel has a diameter of 21 inches. what is circumference of this wheel? what is the radius?

Brent wants to know what is 5 x 1/2

Me, the vertices of quadrilateral coat are c(2,0), o(7,0), a(7,2) and t(2,2). prove that coat is a rectangle.

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')