Answer as soon as possible
what is the product of a+3 and −2a^2+15a+6b^2?
a −2a^3+9a^2+45a+24b^2
b −2a^3+21a^2+45a+24b^2
c −2a^3+9a^2+45a+6ab^2+18b^2
d −2a^3+21a^2+45a+6ab^2+18b^2

Ineed the solution to this problem and the steps.

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

Convert the density of surface sea water to metric tons/cubic meter