PLEASE SOMEBODY HELP!! please find the products to these :D
7. (x − 7) (x − 2)

8. (2x + 3) (3x − 2)

9. (x − 6) (3x − 4y)

10. (x − 4) (x2 + 7x − 8)

11. (3x − 4) (2x2 + 5x + 4)

12. (−2x2 + 5 )(x3 − 8x − 6)

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