Find the direction cosines of the vector u given below.
?
?
A. 
,
,
B. 
,
,
C. 
,
,
D. 
,
,
E. 
,
,
Answer: D
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Solve.The amount of water used to take a shower is directly proportional to the amount of time that the shower is in use. A shower lasting 23 minutes requires 9.2 gallons of water. Find the amount of water used in a shower lasting 5 minutes.
A. 1.84 gallons B. 12.5 gallons C. 42.32 gallons D. 2 gallons
Solve the problem.Your starting salary for a new job is $30,000 per year. You are offered two options for salary increases: Option 1: an annual increase of $1000 per year or Option2: an annual percentage increase of 4% of your salary.Your salary is a function of the number of years of employment at your job. Write an equation to determine the Salary S after x years on the job for each option.
A. Option 1: S = 30,000 + 1000x Option 2: S = 30,000(1.04)x B. Option 1: S = 30,000x + 1000 Option 2: S = 30,000x1.04 C. Option 1: S = 1000x Option 2: S = (1.04)x D. Option 1: S = 30,000(1000x) Option 2: S = 30,000 + (1.04)x
Use the given graph of the quadratic function f to write its formula as 
.
A. f(x) = - 
(x - 3)2 - 2
B. f(x) = - 
(x + 3)2 - 2
C. f(x) = -(x - 3)2 - 2
D. f(x) = -2(x - 3)2 - 2
Use a calculator to find an equation that has 
as a solution.
A. 
B. 
C. 
D. 
E. 