If Joan read 75 pages in 4 hours how long will it take her to read 250 pages
2 answers:
Answer:
13 hours and 20 minutes
Step-by-step explanation:
Joan read in 4 hours = 75 pages
She read in 1 hour = pages
= 18.75 pages
It will take her to read 250 pages =
= 13.33 hours.
Now we will convert 0.33 hours to minute.
0.33 × 60 = 19.8 minutes ≈ 20 minutes
It will take her 13 hours and 20 minutes to read 250 pages.
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Answer:
90 engines must be made to minimize the unit cost.
Step-by-step explanation:
Vertex of a quadratic function:
Suppose we have a quadratic function in the following format:
It's vertex is the point
In which
Where
If a>0, the minimum value of the function will happen for
C(x)=x²-180x+20,482
This means that
How many engines must be made to minimize the unit cost?
x value of the vertex. So
90 engines must be made to minimize the unit cost.