Find the determinant.det
A. 34
B. 17
C. 68
D. 136
Answer: C
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Solve.The speed of a vehicle is inversely proportional to the time it takes to travel a fixed distance. If a vehicle travels a fixed distance at 40 miles per hour in 30 minutes, how fast must it travel to cover the same distance in 25 minutes?
A. 
mph
B. 48 mph
C. 
mph
D. 
mph
Find the sum of the series.
A. 13 B. 15 C. 21 D. 16
Find the expected value.Mr. Cameron is sponsoring an summer concert. He estimates that he will make $300,000 if it does not rain and make $60,000 if it does rain. The weather bureau predicts the chance of rain is 0.34 for the day of the concert. An insurance company is willing to insure the concert for $150,000 against rain for a premium of $30,000. If he buys this policy, what are his expected earnings from the concert?
A. $180,000 B. $300,000 C. $270,000 D. $239,400
Solve the problem.Find the volume V and surface area S of a sphere of radius 10 centimeters. Express the answer in terms of ?.
A. V = 4,000? cm3; S = 25? cm2
B. V = 
? cm3; S = 
? cm2
C. V = 1,000? cm3; S = 100? cm2
D. V = 
? cm3; S = 400? cm2