Answer:
Total Cost in a day is . Profit function is . And the revenue function is . In a day, bookstore must sell at least 15 books, because of 6n-90=0, in order to make profit.
Step-by-step explanation:
-90
Given:
Perimeter of a rectangular paper = 22 inches.
Area of the rectangular paper = 28 square inches.
To find:
The dimensions of the rectangular paper.
Solution:
Let l be the length and w be the width of the rectangular paper.
Perimeter of a rectangle is:

Perimeter of a rectangular paper is 22 inches.


...(i)
Area of a rectangle is:

Area of the rectangular paper is 28 square inches.

Using (i), we get



Splitting the middle term, we get



Using zero product property, we get


If
, then by using (i)


If
, then by using (i)


Therefore, the dimensions of the paper are either
or
.
Answer:
.45 miles
Step-by-step explanation:
27 mph - How many miles per minute
We already know that there are 60 seconds in an hour. So the best thing to do in this situation is to divide the miles per minute.
27/60 = 0.45
.45 miles per minute
As a fraction, your answer would be 9/20
Step-by-step explanation:
where does it cross the y-axis ?
at y = -8