Jennifer is saving money to buy a bike. the bike costs $245. she has $125 saved, and each week she adds $15 to her saving. how long will it take her to sabe enough money to buy the bike?

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?

Which exponential function has an initial value of 2? f(x) = 2(3x) f(x) = 3(2x)

Random variables x poisson~ ( a) ,y poisson ~ ( a) . x and y are independent. if 2 1, 2 1. u =2x+ y-1, v=2x- y +1. find: ) cov (u ,v ).