Use the choices below to fill in the blank. Choices may be used more than once or not at all.
A formula for calculating a combination of n items taken r at a time is 
.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Write an equation for the linear function and use it to answer the given question. The price of a particular model car is $11,730 today and rises with time at a constant rate of $1125 per year. How much will a new car cost in 3.2 years?
A. p = 11,730 + 1125t; $15,330.00 B. p = 11,730t - 1125; $36,411.00 C. p = 1125 + 11,730t; $38,661.00 D. p = 11,730 - 1125t; $8130.00
Mathematics
Express the number in decimal notation.8.1 × 105
A. 81,000 B. 8,100,000 C. 405 D. 810,000
Mathematics
Write as a percent.0.4
A. 0.04% B. 0.4% C. 400% D. 40%
Mathematics
Solve the problem.The area of a rectangular floor is 12m2 + 6m - 18. Find the length if the width is 
A. 4m - 6 B. 4m + 6 C. 12m - 6 D. 12m + 6
Mathematics