Mathematics, 23.05.2020 20:02 unicorns110504
The loudness, L. measured in decibels (Db), of a sound intensity, I measured in watts per square meter, is defined as
- 101007, where 10 = 10-12
and is the least intense sound a human ear can hear. Brandon is trying to take a nap, and he can
barely hear his neighbor mowing the law. The sound intensity level that Brandon can hear is 10-10 Ahmad, Brandon's
neighbor that lives across the street, is mowing the lawn, and the sound intensity level of the mower is 10-4 How does
Brandon's sound intensity level compare to Ahmad's mower?
1
Brandon's sound intensity is the level of Ahmad's mower.
1
Brandon's sound intensity is the level of Ahmad's mower.
Brandon's sound intensity is 20 times the level of Ahmad's mower
Brandon's sound intensity is 80 times the level of Ahmad's mower.
Answers: 1
Mathematics, 21.06.2019 15:30
Fabian harvests 10 pounds of tomatoes from his garden. he needs 225 pounds to make a batch of soup. if he sets aside 2.8 pounds of tomatoes to make spaghetti sauce, how many batches of soup can fabian make?
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Mathematics, 21.06.2019 18:30
Write an inequality and solve each problem.for exercises 11 and 12, interpret the solution.
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Mathematics, 21.06.2019 19:50
Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .
Answers: 3
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