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3 years ago

15

John placed $5000 in an account that earns interest compounded annually. His interest rate is 8.2%. If John leaves his money in

the account for 10 years, what is the balance of his account? Round your answer to the nearest dollar.

1 answer:

devlian [24]3 years ago

8 0

$9,100

I multiplied 5000 x .082 and got 410
then i multiplied 410 x 10 and got 4,100
then i added 5000 + 4100 to get $9,100.

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Explanation:

Given that the height, h, in feet of a rock above the ground is given by the equation $h=-16t^2+24t+16$ , where t is the time in seconds after the rock is thrown.

We need to determine the time at which the rock will hit the ground.

To determine the time, let us equate the height h = 0 in the equation $h=-16t^2+24t+16$ , we get,

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Thus, we have,

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$t=\frac{-24 \pm \sqrt{576+1024}}{-32}$

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$t=\frac{-24 \pm 40}{-32}$

Hence, the two values of t are

$t=\frac{-24 + 40}{-32}$ and $t=\frac{-24 -40}{-32}$

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Thus, the rock will hit the ground at 2 seconds.

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