Modeling with Exponential and Logarithmic Equations

Question 1

Which equation can you use to solve this problem?

Revolt · Accepted Answer

Answer image: https://r21.core.learn.edgenuity.com//media.edgenuity.com/EVresources/3111-10-11-30-01-task/mc001-3.jpg

Question 2

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

Revolt · Accepted Answer

115

Question 3

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 4

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 5

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 6

The loudness of a jack hammer is 96 dB. Its sound intensity is about . The loudness of a compactor is 94 dB. Its sound intensity is about .

Revolt · Accepted Answer

0.004; Selection 1: 0.004; Selection 2: 0.0025

Question 7

a = b =

Revolt · Accepted Answer

Part 1: 0.814; Part 2: 37.673

Question 8

How would you explain the relationship between the real zero(s) of the function and x-intercept(s) of the graph?

Revolt · Accepted Answer

Since the graph never crosses the x-axis, the function has no real zeros.

Question 9

Which equation has real zeros corresponding to the x-intercepts of the graph?

Revolt · Accepted Answer

y = log3(x) – 1

Question 10

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

Revolt · Accepted Answer

0.0025

Modeling with Exponential and Logarithmic Equations Answers

More from this Course

TRY EDGENUITY HACKS