Solve.The temperature at the South pole was 6° at 8 am. At 3 pm, it was -18°. By how many degrees did the temperature drop?
A. by 12°
B. by -12°
C. by 24°
D. by -24°
Answer: C
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The graph of a logarithmic function is shown. Select the function which matches the graph.
A. y = log(x - 1) B. y = log(1 - x) C. y = log x - 1 D. y = 1 - log x
Show that the function is a solution of the wave equation.w(x, t) = cos (3t - 3cx), c ? 1
A. No B. Yes
Find the domain and the range of the functions or relations from the graph.
A. domain: [-2, 2]; range: (-?, ?) B. domain: (-?, ?); range: (-?, ?) C. domain: (-?, ?); range: (-?, -2] ? [2, ?) D. domain: (-?, -2] ? [2, ?); range: (-?, ?)
Solve the problem.A wire is cut into two pieces, with one piece 14 feet shorter than the other. The wire was 84 feet before it was cut. How long is the shortest length of wire?
A. 28 ft B. 35 ft C. 49 ft D. 56 ft