Simplify the expression using the order of operations.(80 + 42) ÷ 2 ? 22
A. 192
B. 12
C. 82
D. 112
Answer: A
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Solve the logarithmic equation. Be sure to reject any value that is not in the domain of the original logarithmic expressions. Give the exact answer.log2x = 5
A. {25} B. {2.32} C. {10} D. {32}
Solve the problem.Coffee is best enjoyed at a temperature of 119°F. A restaurant owner wants to discover the temperature T at which he should serve his coffee so that it will have cooled to this ideal temperature in 4 minutes. He discovers that a cup of coffee served at 200°F cools to 180°F in one minute when his restaurant is at 73°F. If he maintains the restaurant temperature at 73°F, at what temperature should he serve the coffee to meet his goal? Use Newton's law of cooling, f(t) = T0 + Ce-kt, where f(t) is the temperature at time t after being introduced into an environment with a constant temperature T0 and C and k are constants.
A. 159°F B. 200°F C. 164°F D. 184°F
Write a quadratic equation in standard form with the given solution set.{-10, 3}
A. x2 + 7x - 30 = 0 B. x2 - 30x - 7 = 0 C. x2 + 30x - 7 = 0 D. x2 - 7x - 30 = 0
Find the exact value.Given that cos ? = - 
with ? in quadrant II, find cos 2?.
A. - 
B. 
C. - 
D. 