Show that the points (20°N,20°E) and (60°N,160°W) lie on the same great circle. find their great-circle distance apart.

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

How do the number line graphs of the solutions sets of -23 > x and x-23 differ?

To finance her community college education, sarah takes out a loan for $2900. after a year sarah decides to pay off the interest, which is 4% of $2900. how much will she pay