Month: August 2015

A toxic radioactive substance with a density of 4 milligrams per square centimeter is detected in the ventilating of a nuclear processing that was used 55 years ago. If the…

The drug Valium is eliminated from the bloodstream exponentially with a half-life of 36 hours. Suppose that a patient receives an initial dose of 70 milligrams of Valium at midnight.…

Solve 2x = 64.   Solution:-    First, write each side of the equation with the same base. 2x  = 64 2x = 26 Apply the one-to-one property of exponential…

Kara’s Custom Tees experienced fixed costs of 450 and variable costs of 5 per shirt. Write an equation that can be used to determine the total expenses, find the cost,…

Give the slope and the y-intercept of the line with the given equation. Then, graph the linear equation. y = 5x + 2 Solution:-   Recall that the slope-intercept from…

  A 650 washing machine in a Laundromat is depreciated for tax purposes at a rate of 65 per year. Find a function for the depreciated value of the washing…

For the graph, find the average rate of change as a reduced fraction. Also, state the approximate units.(do not abbreviate).   Solution:-   The average rate of change is an…

The concentration of hydrogen ions in a liquid laboratory sample is 0.001 moles/liter. Find the pH of the sample.   Solution:-   pH = 3.  

  The concentration of hydrogen ions in a liquid laboratory sample is 0.0000001 moles/liter. Find the pH of the sample.   Solution:-   The formula for the pH of a…

  The initial population of a town is 4100, and it grows with a doubling time of 10 years. What will the population be in 12 years?   Solution:-  …