Find the magnitude of u × v and the unit vector parallel to u × v in the direction of u × v.u = - 
i + 
j + k, v = i + j + 2k
A. 2
; - 
i + 
j - 
k
B. 8; 
i - 
j - 
k
C. 8; 
i - 
j + 
k
D. 2
; 
i + 
j - 
k
Answer: D
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Solve the problem.If money is invested for 3 years with interest compounded annually, the future value of the investment varies directly as the cube of 1 + r, where r is the interest rate. If the future value of the investment is $9317.00 when the rate is 10%, what rate gives a future value of $8575.30? Round to the nearest whole percent.
A. 8% B. 6% C. 7% D. 9%
Find the LCD. Build up the fractions to equivalent fractions having the LCD as the denominator.
and 
A. 
and 
B. 
and 
C. 
and 
D. 
and 
Use the given conditions to write an equation for the line in slope-intercept form.Slope = 
, y-intercept = 2
A. f(x) = 
x - 2
B. f(x) = 
x + 
C. f(x) = - 
x - 2
D. f(x) = 
x + 2
Solve the problem.The population of a particular city is increasing at a rate proportional to its size. It follows the function P(t) = 1 + ke0.05t where k is a constant and t is the time in years. If the current population is 32,000, in how many years is the population expected to be 80,000? Round to the nearest year.
A. 10 yr B. 119 yr C. 8 yr D. 18 yr