What is the circumference of a circle that has a radius of 4 inches? Use 3.14 for pie symbol.

Mathematics

1 answer:

Charra [1.4K]2 years ago

6 0

C=pie(r)2

C=3.14 (4)2
3.14 (8)=25.12

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The function is graphed as shown below

Part A:

We use the formula $- \frac{b}{2a}$ to find the vertex of the function. A quadratic function of the form of $a x^{2} +bx+c$ and equating this form to the given function $- x^{2} +20x-75$ , we have
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Part B:

We can find solution to this equation by factorising

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$-( x^{2} -20x+75)=0$
$x^{2} -20x+75=0$
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The two values means that the company makes no profit when they either produce 5 or 15 photos