Solve.You wish to apply blacktop sealer to your driveway, but do not know how much to buy. If your rectangular driveway measures 75 feet long by 10 feet wide, and a can of blacktop sealer claims to cover 150 square feet, how many cans should you buy?
A. 7 cans
B. 4 cans
C. 5 cans
D. 6 cans
Answer: C
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Use the dot product to find 
.v = 
A. 2i
B. -4
C. 10
D. 
Solve the problem.Newton's Law of Cooling states that the rate of change of temperature of an object is proportional to the difference in temperature between the object and the surrounding medium. Thus, if T is the temperature of the object after t hours and T0 is the (constant) temperature of the surrounding medium, then
where k is a constant. A dish of lasagna baked at 400°F is taken out of the oven into a kitchen that is 74°F. After 8 minutes, the temperature of the lasagna is 320.4°F. What will its temperature be 11 minutes after it was taken out of the oven? Round your answer to the nearest degree.
A. 305°F B. 296°F C. 280°F D. 289°F
Perform the indicated operations and, if possible, simplify.
÷ 
? 
A. 
B. r + s
C. 
D. r - s
Find the coordinates of the focus to two decimal places.
x² = –77y A) (–19.25, 0) B) (0, –19.25) C) (0, 19.25) D) (–77, 0)