Use the change-of-base formula and a calculator to evaluate each logarithm.log100 40
A. 4.6052
B. 1.2484
C. 3.6889
D. 0.801
Answer: D
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The amount A, in grams, of a certain isotope of uranium remaining after t minutes of decay is given by
.
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A: Make a graph of A versus t over one hour.B: How much of the isotope is present after 13 minutes?C: What is the half-life of this isotope? That is, how long will it take for half of the substance to decay?
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?Round your answer to two decimal places if necessary.
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What will be an ideal response?
A recursion formula and the initial term(s) of a sequence are given. Write out the first five terms of the sequence.a1 = 1, an+1 = an + 5
A. 1, 6, 11, 16, 21, 26 B. 6, 11, 16, 21, 26 C. 1, 5, 25, 125, 625, 3125 D. 1, 6, 11, 16, 21
Use the change-of-base formula and a calculator to evaluate each logarithm.log2.2 79
A. 5.5418 B. 35.9091 C. 0.1804 D. 1.8976
Solve the problem.Bob can overhaul a boat's diesel inboard engine in 30 hours. His apprentice takes 60 hours to do the same job. How long would it take them working together assuming no gain or loss in efficiency?
A. 12 hr B. 20 hr C. 90 hr D. 8 hr