Solve the problem.A student is told to answer any 7 out of 10 questions on an exam. In how many different ways can he choose the 7 questions to answer?
A. 720
B. 10,000,000
C. 120
D. 21
Answer: C
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Simplify the given expression using the definition for negative exponents. Assume that all variables represent nonzero numbers.
A. a16 B. a97 C. a2 D. 97
Solve the problem.The formula C = 2x + 20 represents the estimated future cost of yearly attendance at State University, where C is the cost in thousands of dollars x years after 2002. Use a compound inequality to determine when the attendance costs will range from 34 to 42 thousand dollars.
A. From 2010 to 2014 B. From 2009 to 2013 C. From 2010 to 2012 D. From 2008 to 2012
Translate to an equation and solve.What is 38% of 1390?
A. n = 0.038 × 1390; 52.82 B. n = 0.38 × 1390; 528.2 C. n = 38 × 1390; 52,820 D. 1390 = 0.38 × n; 5282
Solve.Find the height of the cliff. If necessary, round to the nearest hundredth yard.
A. 12 yd B. 37.74 yd C. 26.13 yd D. 24.98 yd