Please help me with the question provided below using the graph.

Chrome File Edit View History Bookmarks People Window Help 25% Thu 9:41 PM . . . A 2191 - Spring 2019 - X FSP Forms X A Sexual Selection Voicx Sexual Selection Voic M Inbox - shannonakun X VA Section 2.7 (120R) X G what is 10% of 30 - ( X + - C https://www.webassign.net/web/Student/Assignment-Responses/submit?dep=20826967 O Suppose an oil spill covers a circular area. The radius in feet, r, increases according to the graph shown below where t represents the number of minutes since the spill was first observed. For the purpose of this problem, assume this is the entire graph. 80 70 - 50 - Radius (feet) 30 - 20 - 0 10 20 30 40 50 60 70 80 90 Time (minutes) (a) How large is the area of the spill 30 minutes after it was first observed? Give an exact answer. square feet (b) If the cost to clean the oil spill is proportional to the square of the diameter of the spill, which of the following represents the cost, C as a function of the radius of the spill? O C(d) = kd? O c(r) = 2kr? O C(r) = KV 2r O C(r) = 2kVT O c(r) = k(2r)2 (c) Find the domain of the inverse function r-1 O [10, 90] O [0, 90] O [0, 70] O [10, 70] [o, 80] 28 ... WChrome File Edit View History Bookmarks People Window Help 25% Thu 9:41 PM . . . A 2191 - Spring 2019 - x FSP Forms X A Sexual Selection Voicx Sexual Selection Voic M Inbox - shannonakun X A Section 2.7 (120R) X G what is 10% of 30 - ( X + -> C https://www.webassign.net/web/Student/Assignment-Responses/submit?dep=20826967 * G I IS O (a) How large is the area of the spill 30 minutes after it was first observed? Give an exact answer. square feet (b) If the cost to clean the oil spill is proportional to the square of the diameter of the spill, which of the following represents the cost, C as a function of the radius of the spill? O C(d) = kd? O c(r) = 2kr? O c(r) = KV 2r O C(r) = 2KVT O c(r) = k(2r)? (c) Find the domain of the inverse function r-1 O [10, 90] O [0, 90] O [o, 70] O [10, 70] O [o, 80] (d) Which of the following expressions could be used to represent the amount of time it took for the radius of the spill to increase from 20 feet to 60 feet? Or-1(80) - r-1(30) Or-1(80 - 30) O r(60) - r(20) Or-1(60) - r-1(20) O r(80) - r(30) Submit Answer Save Progress 28 ... w