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2 years ago

Rachel has $9 in a savings account. The interest rate is 5%, compounded annually.

1 answer:

7 0

1 % of 9 is 0.09, multiply 0.09 by 5= 0.45 (to find 5%)
Then multiply 0.45 by 36 (3years)= 16.20
Then add 16.20 to $9= $25.20

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2 years ago

What is the equation of the circle with center (5,-4) and containing the points (5,-2)

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Answer:

The equation of a circle is $(x-5)^2+(y+4)^2=4$ .

Step-by-step explanation:

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$(x-h)^2+(y-k)^2=r^2$ (where center is $(h,k)$ , the point $(x_{1},y_{1})$ and the radius known as $r$ ).

-Use the center (5,-4) and the point (5,-2) for the equation:

$(5-5)^2+(-2+4)^2=r^2$

-Solve the equation:

$(5-5)^2+(-2+4)^2=r^2$

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$\sqrt{4} = \sqrt{r^2}$

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-After you found the radius, use the center (5, -4) and radius 2 to get the equation of a circle:

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-Then, after you have the equation, the radius needs to simplified by the exponent:

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