Solve the problem.A home has a living room that is 15 ft wide and 21 ft long. The height is 9 ft. Bob needs to paint the room. He has to paint the walls and the ceiling. (He will not paint the floor.) There are two 3.0 ft by 5.0 ft windows and a 4.0 ft by 7.0 ft opening into the room that will not be painted. A gallon of paint covers 320 ft2. How many gallons of paint are needed? (All data are accurate to two significant figures.)
A. 2.8 gallons
B. 3.0 gallons
C. 1.8 gallons
D. 3.8 gallons
Answer: A
Mathematics
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Find the limit, if it exists.
A. Does not exist B. 0 C. -6 D. 6
Mathematics
Solve the problem.The shape and density of a thin shell are indicated below. Find the moment of inertia about the z-axis.Shell: upper hemisphere of x2 + y2 + z2 = 9 cut by the plane z = 0Density: ? = 3
A. Iz = 324?
B. Iz = 27?
C. Iz = 
?
D. Iz = 162?
Mathematics
Solve the problem.Graph y = sin x and y = cot x. How many times do the graphs intersect on the interval 
A. 4 B. 1 C. 2 D. 3
Mathematics
Provide an appropriate response.The fraction 
converts into a repeating decimal.
A. True B. False
Mathematics