1. Determine the minimun angle at which a roadbes should be banked so that a car traveling at 10.0 m/s can safelt negotiate the curve if the radius of the curve is 2.00 x 10^2 m.

2.What is the acceleration due to gravity at an altitude of 1.00 x 10^6 m above the earth's surface? NOTE: the radius of the earth is 6.83 x 10^6 m.

i had some trouble with number one because i never took a calc class, so im stuck with tan(theta) on one side and i dont know what to do. any help at all is greatly appreciated.