The regular price of an item at a store is p
dollars. the item is on sale for 20% off the regular price. some of the expressions shown below represent the sale price, in dollars, of the item.
expression a: 0.2p
expression b: 0.8p
expression c: 1 -0.2p
expression d: p-0.2p
which two expressions each represent the sale price of the item?
a. expression a and expression e
b. expression b and expression c
c. expression b and expression d
d. expression c and expression d

Need on this geometry question. explain how you did it.

How do u write a function for the reflection across the y axis

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