Modeling with Exponential and Logarithmic Equations

Question 1

Which equation can you use to solve this problem?

Revolt · Accepted Answer

Answer image: //media.edgenuity.com/EVresources/3111-10-11-30-01-task/mc001-3.jpg

Question 2

The loudness of a compactor is 94 dB. Its sound intensity is about ✔ 0.00250.00430.0081.

Revolt · Accepted Answer

✔ 0.0025

Question 3

After 100 years, about 60100✔ 115 grams of the sample will remain.

Revolt · Accepted Answer

✔ 115

Question 4

The equation for the pH of a substance is pH = –log[H+], where H+ is the concentration of hydrogen ions. What is the approximate pH of a solution if the concentration of hydrogen ions is 5.0 × 10–4 moles per liter?

Revolt · Accepted Answer

3.3

Question 5

The general equation for depreciation is given by y = A(1 – r)t, where y = current value, A = original cost, r = rate of depreciation, and t = time, in years. The original value of a car is $24,000. It depreciates 15% annually. What is its value in 4 years? $

Revolt · Accepted Answer

12,528.15

Question 6

After 10 years, a $2,000-dollar investment compounded annually has grown to $3600. What is the interest rate to the nearest whole-number percent? %

Revolt · Accepted Answer

6

Question 7

Question 7

Revolt · Accepted Answer

.: 0.004; .: 0.0025

Question 8

The loudness of a jack hammer is 96 dB. Its sound intensity is about 0.0096✔ 0.0040.0021.

Revolt · Accepted Answer

✔ 0.004; .: 0.004; .: 0.0025

Question 9

The sound intensity of the jack hammer is about 2.051.85✔ 1.6 times the sound intensity of the compactor.

Revolt · Accepted Answer

✔ 1.6

Question 10

The loudness of a pile driver is 112 dB. About how many times the sound intensity of the jackhammer is the sound intensity of a pile driver? Round to the nearest ten.

Revolt · Accepted Answer

40

Modeling with Exponential and Logarithmic Equations Answers

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