The number of seats in the theater's rows represent an ARITHMETIC SEQUENCE. In an arithmetic sequence, the next term in the sequence is found by adding a constant (a set amount), called the common difference.

For the theater, there are...
17 seats in row 1
20 seats in row 2
23 seats in row 3
26 seats in row 4

How many seats are there in row 15?
How do you know?

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