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meriva
2 years ago
14

The price of bananas went from $0.20 per lb to $0.60 per lb in four years. Find the rate of change of the price of bananas. A) $

0.05 per pound per year B) $0.10 per pound per year C) $0.15 per pound per year D) $0.25 per pound per year
Mathematics
2 answers:
TiliK225 [7]2 years ago
3 0
It would definitely be B. $0.10 because it's 20 cents per pound one year if you add ten cents for four years it's adding up to 60 cents the fourth year.
Serhud [2]2 years ago
3 0
Change = 0.60-0.20 = $0.40 

<span>Rate of change = 0.40/4 = $0.10 per year </span>

<span>ANSWER is B)</span>
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I need an equation for: what number is 70% of 120
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Write an equation for an ellipse centered at the origin, which has foci at (\pm\sqrt{8},0)(± 8 ​ ,0)(, plus minus, square root o
Alchen [17]

Answer:

The equation of ellipse centered at the origin

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Step-by-step explanation:

given the foci of ellipse (±√8,0) and c0-vertices are (0,±√10)

The foci are (-C,0) and (C ,0)

Given data (±√8,0)  

the focus has x-coordinates so the focus is  lie on x- axis.

The major axis also lie on x-axis

The minor axis lies on y-axis so c0-vertices are (0,±√10)

given focus C = ae = √8

Given co-vertices ( minor axis) (0,±b) = (0,±√10)

b= √10

The relation between the focus and semi major axes and semi minor axes are c^2=a^2-b^2

      a^{2} = c^{2} +b^{2}

a^{2} = (\sqrt{8} )^{2} +(\sqrt{10} )^{2}

a^{2} =18

a=\sqrt{18}

The equation of ellipse formula

\frac{x^2}{a^2} +\frac{y^2}{b^2} =1

we know that a=\sqrt{18} and b=\sqrt{10}

<u>Final answer:</u>-

<u>The equation of ellipse centered at the origin</u>

<u />\frac{x^2}{18} +\frac{y^2}{10} =1<u />

                                   

8 0
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