Answer:
5000
Step-by-step explanation:
Let x be the number of yearbooks to print and sell.
Each costs $7 = -7x
Sells for $35 = 35x
When business breaks even it means the total cost is equal to the total revenue. Hence:
35x - 7x = 14000
<=> 28x = 14000
<=> x = 5000
So at 5000 yearbooks , they seek before their business breaks even
For this case we have the following exponential function:
![f(x)= \frac{1}{7}(9)^x](https://tex.z-dn.net/?f=f%28x%29%3D%20%5Cfrac%7B1%7D%7B7%7D%289%29%5Ex%20)
The first thing you should see for this case is the behavior of the function when you substitute values of x.
When replacing positive values (very large) the function tends to infinity because it is an exponential function.
When substituting negative values (very large) the function tends to zero because it is an exponential function.
Therefore, the range of the function is:
(0, ∞)
Equivalently:
y > 0
Answer:
all real numbers greater than 0
Set it up as a proportion
2/3=30/x
Then cross multiply to solve for x