Solve the formula for the specified variable.S = 2?rh + 2?r2 for h
A. h = 2?(S - r)
B. h = 
- 1
C. h = 
D. h = S - r
Answer: C
Mathematics
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If r(t) is the position vector of a particle in the plane at time t, find the indicated vector.Find the acceleration vector.r(t) = (3 cos t)i + (7 sin t)j
A. a = (3 cos t)i + (7 sin t)j B. a = (-3 sin t)i + (-7 cos t)j C. a = (3 sin t)i + (7 cos t)j D. a = (-3 cos t)i + (-7 sin t)j
Mathematics
Use the graph to answer the question.
What were the total sales for the first 6 months of 2009?
A. $366,000 B. $286,000 C. $302,000 D. $64,000
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Solve.A clothing store has a shirt on sale for $17.79. Round this price to the nearest dollar.
A. $17 B. $17.0 C. $17.79 D. $18
Mathematics
Compute 
.Compute 
if u and v are unit vectors and the angle between u and v is 
.
A. 1
B. 
C. 
D. 
Mathematics