Modeling with Exponential and
Logarithmic Equations Assignment 2
Question and answers rated A+
Use logarithmic regression to find an equation of the form y = a + b ln(x) to
model the data. - correct answers A= -76.204
B= 37.673
Using the graphing calculator, estimate to the nearest day how long it will take
the corn to reach 6 feet tall: days - correct answers 51 days
Radium-226, a common isotope of radium, has a half-life of 1,620 years.
How many grams of a 120-gram sample will remain after t years?
Which equation can you use to solve this problem? - correct answers C
After 100 years, about grams of the sample will remain. - correct answers 115
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? - correct
answers 3.3
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.
Logarithmic Equations Assignment 2
Question and answers rated A+
Use logarithmic regression to find an equation of the form y = a + b ln(x) to
model the data. - correct answers A= -76.204
B= 37.673
Using the graphing calculator, estimate to the nearest day how long it will take
the corn to reach 6 feet tall: days - correct answers 51 days
Radium-226, a common isotope of radium, has a half-life of 1,620 years.
How many grams of a 120-gram sample will remain after t years?
Which equation can you use to solve this problem? - correct answers C
After 100 years, about grams of the sample will remain. - correct answers 115
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? - correct
answers 3.3
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.
