Solve the problem.John has received scores of 85, 88, 87, and 80 on her algebra tests. What is the minimum score he must receive on the fifth test to have an overall test score average of at least 82? (Hint: The average of a list of numbers is their sum divided by the number of numbers in the list.)
A. 69
B. 70
C. 71
D. 68
Answer: B
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Evaluate the indicated double integral over R.
; R = {(x, y): 6 ? x ? 10, 4 ? y ? 7}
A. 352 B. 528 C. 1056 D. 704
Solve the problem.A heat engine is a device that converts thermal energy into other forms. The thermal efficiency, e, of a heat engine is defined by 
where Qh is the heat absorbed in one cycle and Qc, the heat released into a reservoir in one cycle, is a constant. Find 
.
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Graph the function f(x) over the given interval. Partition the interval into 4 subintervals of equal length. Then add to your sketch the rectangles associated with the Riemann sum 
, using the indicated point in the kth subinterval for ck.f(x) = x2 - 2, [0, 8], midpoint
A. 
B. 
C. 
D. 
Provide an appropriate response.Solve the following equation: m2 + 7 = 32
Fill in the blank(s) with the appropriate word(s).