Find a unit vector u in the direction of the given vector.
A. 
B. 
C. 
D. 
Answer: D
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The sales of various types of lawn and garden tools vary according to the season. At a certain home improvement store, the monthly sales H of garden hoes (hoes sold per month) decline from July to October whereas the monthly sales of lawn rakes R (rakes sold per month) increase during this same interval. The sales of these two items during the calendar months July-October are modeled by the equations:
?
?
where t is the month (t = 7 corresponds to July). In which month does the number of rakes sold equal the number of hoes sold?
?
A. September
B. July
C. November
D. October
E. August
Find the formula for df-1/dx.f(x) = x3/5
A. x5/3
B. x-2/3
C. 
x2/3
D. 
x-2/5
Graph the line whose equation is given.y = - 
x - 2
A. 
B. 
C. 
D. 
Solve using the addition principle.22 = -12 + n
A. 10 B. -10 C. -34 D. 34