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Concept explainers
a.
The units for company sell to break even.
a.
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Answer to Problem 61E
Explanation of Solution
Given information:
The number of rentals of a newly released DVD of a horror film at a movie rental store decreased each week.At the same time, the number of rentals of a newly released DVD of a comedy film increased each week. Models that approximate the numbers
Calculation:
The given information states that number of rentals of a newly released DVD of a horror film at a movie rental store decreased each week.At the same time, the number of rentals of a newly released DVD of a comedy film increased each week. Models that approximate the numbers
Both the above equations are equal to each other, so both the expressions are equal to
Add
Subtract
Divide both sides by
Thus, after
b.
The units for company sell to make a profit.
b.
![Check Mark](/static/check-mark.png)
Answer to Problem 61E
Explanation of Solution
Given information:
The number of rentals of a newly released DVD of a horror film at a movie rental store decreased each week.At the same time, the number of rentals of a newly released DVD of a comedy film increased each week. Models that approximate the numbers
Calculation:
The given information states that number of rentals of a newly released DVD of a horror film at a movie rental store decreased each week.At the same time, the number of rentals of a newly released DVD of a comedy film increased each week. Models that approximate the numbers
Plug the number of each week into the equation are shown in the following table:
Chapter 7 Solutions
Precalculus with Limits
- Determine whether the lines L₁ (t) = (-2,3, −1)t + (0,2,-3) and L2 p(s) = (2, −3, 1)s + (-10, 17, -8) intersect. If they do, find the point of intersection.arrow_forwardConvert the line given by the parametric equations y(t) Enter the symmetric equations in alphabetic order. (x(t) = -4+6t = 3-t (z(t) = 5-7t to symmetric equations.arrow_forwardFind the point at which the line (t) = (4, -5,-4)+t(-2, -1,5) intersects the xy plane.arrow_forward
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- Let ä(t) = (3,-2,-5)t + (7,−1, 2) and (u) = (5,0, 3)u + (−3,−9,3). Find the acute angle (in degrees) between the lines:arrow_forwardA tank initially contains 50 gal of pure water. Brine containing 3 lb of salt per gallon enters the tank at 2 gal/min, and the (perfectly mixed) solution leaves the tank at 3 gal/min. Thus, the tank is empty after exactly 50 min. (a) Find the amount of salt in the tank after t minutes. (b) What is the maximum amount of salt ever in the tank?arrow_forwardpleasd dont use chat gptarrow_forward
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