Solve the problem.Sue drove her car 275 miles in January, 328 miles in February, and 253 miles in March. If her average mileage for the four months from January to April is to be at least 292 miles, how many miles must she drive in April?
A. at most 292 miles
B. at most 312 miles
C. at least 312 miles
D. at least 287 miles
Answer: C
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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. 
= 
Is the following correspondence a function?Domain: All students attending Laughlin Community CollegeCorrespondence: Each student's Social Security NumberRange: A set of Social Security Numbers
A. No B. Yes
Graph the function.y = - 
cos 
A. 
B. 
C. 
D. 
For the given polar equation, write an equivalent rectangular equation.r = 1 + 2 sin ?
A. 
= x2 + y2 + 2y
B. x2 + y2 = 
+ 2x
C. x2 + y2 = 
+ 2y
D. 
= x2 + y2 + 2x