If A denotes the area of the sector of a circle of radius r formed by the central angle ?, find the missing quantity. If necessary, round the answer to two decimal places.r = 20 feet, ? = 4.144°, A = ?
A. 31.94 ft2
B. 14.47 ft2
C. 17.47 ft2
D. 28.94 ft2
Answer: B
Mathematics
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x = 4, y = -1
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Solve.A boat moves 5 kilometers upstream in the same amount of time it moves 19 kilometers downstream. If the rate of the current is 8 kilometers per hour, find the rate of the boat in still water.
A. 13
kilometers per hour
B. 8 kilometers per hour
C. 6
kilometers per hour
D. 2
kilometers per hour
Mathematics
Find the principal P that will generate the given future value A.A = $10,000 at 7% compounded continuously for 9 years.
A. $5325.92 B. $5355.02 C. $18,776.11 D. $9323.94
Mathematics
Sketch the graph of the function.y = cos (-3?x)
A. 
B. 
C. 
D. 
Mathematics