Solve the problem.The perimeter of a rectangle is six times its width. If the length were increased by 4 inches and the width by 7 inches; then the perimeter would be 160 inches. Find the width.
A. 46 in.
B. 69 in.
C. 138 in.
D. 23 in.
Answer: D
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Solve the problem. Round your answer, if appropriate.One airplane is approaching an airport from the north at 183 km/hr. A second airplane approaches from the east at 297 km/hr. Find the rate at which the distance between the planes changes when the southbound plane is 35 km away from the airport and the westbound plane is 23 km from the airport.
A. -632 km/hr B. -474 km/hr C. -316 km/hr D. -158 km/hr
Calculate the maximum error of the value indicated.cos 0.285 using two terms of the appropriate series expansion.
A. 7.8 × 10-5 B. 1.6 × 10-5 C. 2.7 × 10-4 D. 5.5 × 10-5
Solve the problem.From the top of a vertical tower, 319 feet above the the surface of the earth, the angle of depression to a doghouse is 
How far is it from the doghouse to the foot of the tower? Round your answer to the hundredths place when necessary.
A. 749.7 ft B. 852.3 ft C. 734.11 ft D. 762.1 ft
Find the inverse of the function.f(x) = -5 - 3x
A. f-1(x) = - 
+ 
B. f-1(x) = - 
- 
C. f-1(x) = -2 - x
D. f-1(x) = 
- 