Solve the problem. Round dollars to the nearest cent and rates to the nearest tenth of a percent.The cost of an item is $176. For a special year-end sale the price is marked down 20%. Find the selling price of the item.
A. $211.20
B. $35.20
C. $146.67
D. $140.80
Answer: A
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 velocity vector.r(t) = (-5t2 + 12)i + 
j
A. v = (-10t)i - 
j
B. v = (-10)i + 
j
C. v = (-10t)i + 
j
D. v = 
i + (-10t)j
Mathematics
Evaluate.
A. -15 B. 15 C. -13 D. 9
Mathematics
Write the mixed number as an improper fraction.19
A. 
B. 13
C. 32
D. 247
Mathematics
Evaluate the algebraic expression for the given values of the variables.
- y, for x = 11, y = 2
A. 13 B. 123 C. 119 D. 9
Mathematics