Find u ? v, where ? is the angle between the vectors u and v. Round the answer to the nearest tenth.
= 3, 
= 7, ? = 
A. 26.7
B. 29.7
C. 14.8
D. 16.5
Answer: C
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Solve the problem.Cindy will require $10,000 in 3 years to return to college to get an MBA degree. How much money should she ask her parents for now so that, if she invests it at 
compounded continuously, she will have enough for school? (Round your answer to the nearest dollar.)
A. $7312 B. $7189 C. $5169 D. $13,910
If a projectile (such as a bullet) is fired into the air with an initial velocity v at an angle of elevation ? (see the figure), then the height h of the projectile at time t is given by
?
h = -16t2 + vtsin ?
?
?
Give the equation for the height, if v is 1,600 feet per second and ? is 30°. (Leave your answer in exact value form.)
?
A. 
B. 
C. 
D. 
E. 
Solve the problem.The owner of a video store has determined that the cost C, in dollars, of operating the store is approximately given by 
where x is the number of videos rented daily. Find the lowest cost to the nearest dollar.
A. $262 B. $622 C. $478 D. $406
Provide an appropriate response.A student argued that it is impossible to use the substitution method to determine if a system of equations has no solution or an infinite number of solutions. Is the student correct?
Fill in the blank(s) with the appropriate word(s).