Answer:
the answer is c
Step-by-step explanation:
i just took a test with this question on it.
Answer:
.
Step-by-step explanation:
We need to write an equation for the amount of chemical B as a function of the amount of chemical A.


...(1)
where, k is constant of proportionality.
It is given that fifteen grams of chemical A is used to produce 3 grams of chemical B. It means a=15 and b=3.
Substitute a=15 and b=3 in (1).


Substitute
in (1).

Therefore, the required function is
.
80% = 0.80
divide the area done by the percentage:
920/0.80 = 1150
total area is 1150 square feet
Answer: B. 40%
~hope this helps!~
Step-by-step explanation: