Luke sells you cars for $12 each. His expenses are $3.50 per car, plus $34 for tools. How many cars must he sell for his revenue
1 answer:
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We have
425 corresponds to a z of
575 corresponds to
So we want the area of the standard Gaussian between -3/4 and 3/4.
We look up z in the standard normal table, the one that starts with 0 at z=0 and increases. That's the integral from 0 to z of the standard Gaussian.
For z=0.75 we get p=0.2734. So the probability, which is the integral from -3/4 to 3/4, is double that, 0.5468.
Answer: 55%
The range of the parabola that opens down and has its vertex as (2, 5) is (b)
The vertex of a parabola can represent the minimum or the maximum point in the parabola
The vertex of the parabola is given as:
The range of a function is the set of output values the function can take
From the question, we understand that the parabola opens down.
This means that, the vertex of the parabola is a maximum.
Hence, the range of the parabola is
Read more about parabola at: