Add or subtract as indicated. Express the answer as a single polynomial in standard form.(7x2 + 8x + 10) - (2x2 + 12x + 15)
A. 5x2 - 4x - 5
B. 5x2 + 10x + 25
C. 5x2 - 4x + 5
D. 5x2 - 4x + 25
Answer: A
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For the smooth curve r(t), find the parametric equations for the line that is tangent to r at the given parameter value 
r(t) = (3 sin t)i - (8 cos 3t)j +e-7tk ; to = 0
A. x = 3t, y = -8, z = 1 - t B. x = 3t, y = 8, z = 1 + t C. x = 3, y = -8t, z = -7 + t D. x = 3t, y = -8, z = 1 - 7t
Solve and check the equation.(2x + 1)1/3 = 3
A. 
B. 
C. 
D. 
Solve.The nutrition label on a bag of candy says that a serving size is 41 grams. How many ounces are in a serving? Round your answer to the nearest hundredth if necessary.
A. 18.61 oz B. 1.45 oz C. 1162.35 oz D. 90.2 oz
Work the problem. Give the answer in scientific notation, rounded to two decimal places, unless otherwise indicated.A light-year is the distance that light travels in one year. Find the number of miles in a light-year if light travels 1.86 × 105 miles/second. Assume that there are 365 days in a year.
A. 5.87 × 107 miles B. 5.87 × 1012 miles C. 5.87 × 1014 miles D. 5.87 × 105 miles