Can Someone Help Me Answer These Two Questions?

A research lab grows a type of bacterium in culture in a circular region. The radius of the circle, measured in centimeters, is given by r(t) = 5 - - 6 12+3, where is time measured in hours passed since a circle of a 1cm radius of the bacterium was put into the culture. Express the area, A(), of the bacteria as a function of time, and find the approximate area of the bacterial culture in 4 hours. A A(t) = (5 - 6 and Area after 4 hours = 14.72, cm2 12 + 3 B A(t) = 2n(5 - - 6 -) and Area after 4 hours = 29.43, cm2 12 + 3 6 2 C A(t) = 17 5 1 2 + 3 and Area after 4 hours = 68.93, cm2 D A(t) = 27 5 6 1 2 + 3 and Area after 4 hours = 137.86, cm2 Question 2 10 Points A minivan was purchased for $32,000. If the value of the minivan depreciates by $1,700 per year, find a linear function that models the value V of the car after t years. Use the function and find the value of the car after 5 years. A V(t) = -1,700t + 32,000; value after 5 years = $23,500 B V(t) = -1,700 + 32,000; value after 5 years = $30,300 C V(t) = 1,700 + 32,000; value after 5 years = $33,700 D V(t) = 1,700t + 32,000; value after 5 years = $40,500