Brenda wants to create a formula for computing the total cost of any restaurant dinner bill that includes 6% sales tax, a 15% tip on the pre-tax amount, $5 for parking, and $2.50 for a coat check. Write a simplified expression that can be used to calculate the total cost of a dinner that costs d dollars before tax and tip are added. Simplify the expression.

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.