8. Jan needs to buy a backpack and several folders for school. If she shops at Smart
Supply, the backpack will cost $45 and folders
cost $0.45 each. If she shops at The Supply
Guys, the backpack will cost $50.40 and
folders cost $0.15 each. Write and solve an
inequality to find the number of folders Jan
would need to buy for The Supply Guys to be
the cheaper option.
9.
to
Mc
de
ine
th
th
Inequality:
Solution:

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