Astore had 150 laptops in the month of january. every month, 20% of the laptops were sold and 10 new laptops were stocked in the store. which recursive function best represents the number of laptops in the store f(n) after n months?

f(n) = 150 − 0.8 × f(n − 1) + 10, f(0) = 150, n > 0
f(n) = 0.2 × f(n − 1) + 10, f(0) = 150, n > 0
f(n) = 0.8 × f(n − 1) + 10, f(0) = 150, n > 0
f(n) = 150 + 0.8 × f(n − 1) + 10, f(0) = 150, n > 0

Abucket of paint has spilled on a tile floor. the paint flow can be expressed with the function p(t) = 6(t), where t represents time in minutes and p represents how far the paint is spreading. the flowing paint is creating a circular pattern on the tile. the area of the pattern can be expressed as a(p) = 3.14(p)^2 part a: find the area of the circle of spilled paint as a function of time, or a[p(t)]. show your work. part b: how large is the area of spilled paint after 8 minutes? you may use 3.14 to approximate pi in this problem.