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2 years ago

10

Kenneth needs $5,000 for university in 5 years. His parents plan to invest some money in an account paying interest at a rate of

7.2% per annum, compounded monthly. How much should they invest now to have $5,000 in 5 years.

1 answer:

pochemuha2 years ago

7 0

A lot of money because then they get even more back

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Answer:

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Step-by-step explanation:

The general equation of a sphere is as follows:

$(x - x_{c})^{2} + (y - y_{c})^{2} + (z - z_{c})^{2} = r^{2}$

In which the center is $(x_{c}, y_{c}, z_{c}$ , and r is the radius.

In this problem, we have that:

$x_{c} = 3, y_{c} = 8, z_{c} = 1$

So

$(x - 3)^{2} + (y - 8)^{2} + (z - 1)^{2} = r^{2}$

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This leads us to find the radius.

$(4 - 3)^{2} + (3 - 8)^{2} + (-1 - 1)^{2} = r^{2}$

$r^{2} = 1 + 25 + 4$

$r^{2} = 30$

So the equation of the sphere is:

$(x - 3)^{2} + (y - 8)^{2} + (z - 1)^{2} = 30$

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