Who Donut? charges customers 70 cents per donut. There are 12 donuts in a box. How many dollars did the bakery lose when the sev
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18 hours.
Proportions and stuff.
= 
Cross multiply,
204x = 918 * 4
204x = 3672
/204 /204
x = 18
18 hours.
Proportions and stuff.
Cross multiply,
204x = 918 * 4
204x = 3672
/204 /204
x = 18
18 hours.
Ok first we can split it in two : 
and 
.
The derivative of is 3.
For the first part, we use the chain rule :![[f(g(x))]'=g'(x)f'(g(x))](https://tex.z-dn.net/?f=%5Bf%28g%28x%29%29%5D%27%3Dg%27%28x%29f%27%28g%28x%29%29)
hence 
(since the derivative of the exponential is itself) hence 
The derivative of
For the first part, we use the chain rule :