Solve the problem.A college student earned $7200 during summer vacation working as a waiter in a popular restaurant. The student invested part of the money at 
and the rest at 
If the student received a total of $673 in interest at the end of the year, how much was invested at 
A. $2500
B. $3600
C. $4700
D. $800
Answer: A
Mathematics
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Find the curvature of the curve r(t).r(t) = (3 + cos 6t - sin 6t)i + (4 + sin 6t + cos 6t)j + 9k
A. ? = 3
B. ? = 
C. ? = 3
D. ? = 
Mathematics
Solve the problem.After a new firm starts in business, it finds that its rate of profits (in hundreds of dollars per year) after t years of operation is given by 
Find the profit in year 6 of the operation.
A. $12,100 B. $21,500 C. $31,200 D. $27,550
Mathematics
Determine whether the given ordered pair is a solution of the equation.x + y = 10; (5, 4)
A. Yes B. No
Mathematics
Write the expression as a single logarithm.logc x + logc y
A. logc 
B. logc (x+ y)
C. logc x ? logc y
D. logc xy
Mathematics