A bank manager wants to encourage new customers to open accounts with principals of at least $. He decides to make a poster advertising a simple interest rate of %. What must the principal be if the bank manager also wants to advertise that one can earn $ the first month? Can the poster correctly say, "Open an account of $ and earn at least $ interest in 1 month!"? The principal needs to be $
nothing to earn $ in interest the first month.
(Round to the nearest dollar as needed.)

Ahigh-altitude spherical weather balloon expands as it rises, due to the drop in atmospheric pressure. suppose that the radius r increases at the rate of 0.02 inches per second, and that r = 36 inches at time t = 0. determine the equation that models the volume v of the balloon at time t, and find the volume when t = 360 seconds. v(t) = 4π(0.02t)2; 651.44 in3 v(t) = 4π(36 + 0.02t)2; 1,694,397.14 in3 v(t) = four pi times the product of zero point zero two and t to the third power divided by three.; 4,690.37 in3 v(t) = four pi times the quantity of thirty six plus zero point zero two t to the third power divided by three.; 337,706.83 in3