Answer:

Step-by-step explanation:
We are given the following in the question:
Quantity, q
Selling price in dollars per yard, p

Total revenue earned =

f(20)=13000
This means that 13000 yards of fabric is sold when the selling price is 20 dollars per yard.
f′(20)=−550
This means that increasing the selling price by 1 dollar per yards there is a decrease in fabric sales by 550.
We have to find R'(20)
Differentiating the above expression, we have,

Putting the values, we get,

Answer:
oof
Step-by-step explanation:
Answer:
I think it will be $16.50
Step-by-step explanation:
sorry if I'm wrong
Answer:
30
Step-by-step explanation:
is going to output a number in between
and
.
Luckily you are looking for
in the 1st quadrant which is contained in the given interval above, so the answer just comes down to what the calculator returns from entering
in your calculator.
You may also use the unit circle. sine value refers to the y-coordinate on there.
So you are looking for when the y-coordinate is 1/2 in the fist quadrant which is at 30 degrees.