Find the range of the given function. Express your answer in interval notation.f(x) = -2x2 + 12x - 23
A. [5, ?)
B. (-?, -5]
C. [-3, ?)
D. (-?, -3]
Answer: B
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Use the method of writing each premise in symbols in order to write a conclusion that yields a valid argument.Hard workers sweat. Sweat brings on a chill. Anyone who doesn't have a cold never felt a chill. Anyone who works doesn't have a cold.
A. Hard workers don't go to work. B. Anyone who has a cold works hard. C. Anyone who sweats works hard. D. Hard workers don't get colds.
Solve the problem.In a certain location, the highest temperature recorded was 102°F. The lowest temperature recorded was 123 degrees less than the highest. What was the lowest temperature?
A. 0°F B. -138°F C. -21°F D. 21°F
Use the Change-of-Base Formula and a calculator to evaluate the logarithm. Round your answer to two decimal places.log5.0 2.2
A. 0.49 B. 2.04 C. 0.44 D. 0.34
Solve the problem.A spotlight has a parabolic cross section that is 6 ft wide at the opening and 2.5 ft deep at the vertex. How far from the vertex is the focus? Round answer to two decimal places.
A. 0.26 ft B. 0.90 ft C. 0.21 ft D. 0.52 ft