Find the mean.$50.85, $84.80, $69.15, 
A. $69.15
B. $66.00
C. $55.00
D. $50.85
Answer: B
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Find the probability.A 10-question multiple choice test has 4 possible answers for each question. A student selects at least 6 correct answers. Round to the nearest thousandth.
A. 0.020 B. 0.118 C. 0.989 D. 0.995
Perform the operation indicated. Simplify.
+ 
A. 
B. 
C. 
D. 
Solve the problem.Assume the cost of a car is $20,000. With continuous compounding in effect, the cost of the car will increase according to the equation C = 20,000ert, where r is the annual inflation rate and t is the number of years. Find the number of years it would take to double the cost of the car at an annual inflation rate of 5.9%. Round the answer to the nearest hundredth.
A. 167.86 years B. 1.68 years C. 179.60 years D. 11.75 years
Represent the system of linear equations in the form AX = B and solve by finding A-1 and using X = A-1B. y + z = 7,3x - z = 5, 2x + y + 3z = 4
What will be an ideal response?