Translate the phrase to an algebraic expression. Use "x" to represent "a number". The sum of -3
and a number
A. -3
? x
B. x - 3
C. -3
+ x
D. 3
- x
Answer: C
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Find the volume of the solid generated by revolving the region about the y-axis.The region enclosed by x = 2tan 
, x = 0, y = - 
A. 28? - 7?2
B. 28 - 7?
C. 7? + 7?2
D. 14? - 
?2
Determine ratio of A to B. Round as indicated.A = $93,000 is the average cost of a home in Town A and B = $210,000 is the average cost of a home in Town B. (Round to the nearest hundredth when necessary.)
A. 2.26 B. 4.43 C. 0.44 D. 0.04
Solve the problem.The table shows the number of new cases (in thousands) of a certain disease diagnosed in a country in various years. 
Let n = f(t) be the number of new cases (in thousands) of the disease diagnosed at t years since 2010. Suppose that you wish to model f using a quadratic equation. What is the vertex of the model? What does it mean in this situation?
A. (7, 45.7); the largest number of new cases diagnosed was 45,700 in the year 2017 B. (0, 49.4); the largest number of new cases diagnosed was 49,400 in the year 2010 C. (3, 39.3); the smallest number of new cases diagnosed was 39,300 in the year 2013 D. (0, 39.3); the smallest number of new cases diagnosed was 39,300 in the year 2013
Use a graphing utility to graph the function over the indicated interval and approximate any local maxima and local minima. If necessary, round answers to two decimal places.f(x) = x2 + 2x - 3; (-5, 5)
A. local maximum at (1, -4) B. local maximum at (-1, 4) C. local minimum at (1, 4) D. local minimum at (-1, -4)