Answer as soon as possible.
eric downloads a coupon for 10% off. he bought a camera for 95 dollars and an extra battery for 15.99 dollars.
a: what is the total cost if the coupon is applied to the digital camera
b: what is the total cost if the coupon is applied to the extra battery
c: to witch item should eric apply the discount? explain
d: eric has to pay 8% sales tax after the coupon is applied. how much is his total bill?

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