Let x be a number. Translate the expression into an English phrase.x + 9
A. A number multiplied by 9
B. A number decreased by 9
C. A number divided by 9
D. A number increased by 9
Answer: D
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Identify the type of surface represented by the given equation.
+ 
+ 
= 1
A. Sphere B. Ellipsoid C. Paraboloid D. Elliptical cone
Solve the problem.The population of a particular country was 23 million in 1983; in 1992, it was 31 million. Write an exponential growth function that describes the population of this country, in millions, t years after 1983. Round the growth rate to the nearest thousandth.
A. A =23e0.033t B. A = e0.033t C. A =23e0.033k D. A = 31e0.033t
Solve the system of equations by substitution, if a solution exists.
A. x = 
, y = 
B. Many solutions
C. x = 
, y = 
D. No solution
Solve the problem. Round your answer to the nearest whole number.A line from the top of a cliff to the ground passes just over the top of a pole 7.0 feet high and meets the ground at a point 6.0 feet from the base of the pole. If the point is 64 feet from the base of the cliff, how high is the cliff?
A. 2688 feet B. 75 feet C. 6 feet D. 448 feet