Find the magnitude of the indicated vector.If u = -2i + 7j and v = 0i + 13j, find the magnitude of v - u.
A. 2
B. 3
C. 
D. 2
Answer: A
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Find the net cost. Round to the nearest cent.$872 less 10/10/20/30
A. $802.00 B. $261.60 C. $436.00 D. $395.54
Use algebraic and/or graphical methods to solve the inequality.(x + 10)(x2 - 49) > 0
A. -10 < x < -7 or x > 7 B. x < -7 or x > 7 C. -10 < x < 7 D. x < 7 or 7 < x < 10
Use properties of logarithms to condense the logarithmic expression. Write the expression as a single logarithm whose coefficient is 1. Where possible, evaluate logarithmic expressions.ln x + 4ln y
A. ln 4xy
B. ln 
C. ln (x + 4y)
D. ln xy4
Solve the problem.Assume that a person's threshold weight W, defined as the weight above which the risk of death rises dramatically, is given by W(h) = 
3, where W is in pounds and h is the person's height in inches. Find the threshold weight for a person who is 6 ft 7 in. tall. Round your answer to the nearest pound.
A. 161.6 lb B. 296.3 lb C. 221.5 lb D. 265 lb