Solve and simplify.x + 
= 
A. x = 
B. x = 
C. x = - 
D. x = 
Answer: D
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Solve.An elliptical bicycle path is constructed in a local park. The equation of the ellipse that represents the path, in yards, is given by 
+ 
= 1. What are the length and the width of the bicycle path?
A. length: 30 yd; width: 55 yd B. length: 55 yd; width: 30 yd C. length: 60 yd; width: 110 yd D. length: 110 yd; width: 60 yd
Find the derivative.y = 6x-2 + 6x3 + 13x
A. -12x-3 + 18x2 B. -12x-1 + 18x2 C. -12x-1 + 18x2 + 13 D. -12x-3 + 18x2 + 13
An after-shave lotion is 40% alcohol. If you have 15 fluid ounces of the lotion, how much water must be added to reduce the mixture to 30% alcohol? ? __________ ounces of water
Fill in the blank(s) with the appropriate word(s).
The Richter scale converts seismographic readings into numbers for measuring the magnitude of an earthquake according to this function M(x) = log 
, where x0 = 10-3.What is the magnitude of an earthquake whose seismographic reading is 7.7 millimeters at a distance of 100 kilometers from its epicenter? Round the answer to the nearest tenth.
A. 2.7 B. 886.5 C. 3.9 D. 2.9