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10.02.2020 •
Mathematics
Christopher deposited 1 billion into his savings. His savings is a compound interest account with a rate of 9% and only compound once a year. How much money would Christopher have at the end of 10 years in millions?
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Ответ:
P'=2,367 million $
Step-by-step explanation:
Compound Interest
It refers to the case where the interests earned in a certain period are added to the principal sum of a loan and re-invested. Interest in the next period is then earned on the principal sum plus previously accumulated interest.
Being P the principal, or initial amount of a loan or deposit, r the nominal annuual interest rate and t the time the interest is applied, the total accumlated value or future value is
According to the conditions of the problem, Christopher deposited 1 billion into his savings. This gives us the principal P=1,000 milion dollars. The interest rate is 9% compounded once a year during t=10 years. Here n=1 since the compounding does not occur in the middle of the yearly period. Thus
Ответ:
The path of the football is an illustration of parabolas.
The maximum height is:The function is given as:
(a) The maximum height
First, we differentiate the function with respect to x
Set the above equation to 0
Collect like terms
Divide both sides by -0.06
Substitute 25.5 for x in![\mathbf{y = -0.03x^2 + 1.53x}](/tpl/images/0294/5089/2aa90.png)
Hence, the maximum height is:![\mathbf{19.2525yd}](/tpl/images/0294/5089/629c4.png)
(b) How far the football is kicked
Equate
to 0
Now, we solve for x (i.e. the horizontal distance)
Divide both sides by -x
Divide both sides by 0.03
Hence, the football is kicked to 51 yards
Read more about maximizing functions at:
link