Please help meeeeee I will mark you!. I need an answer and explanation

Mathematics

1 answer:

kari74 [83]3 years ago

5 0

Answer:

12^2 + x^2 = 13^2

Step-by-step explanation:

The student's error was that he didn't use the Pythagorean Theorem correctly

According to the Pythagorean Theorem, a^2 + b^2 = c^2, where c represents the hypotenuse

However, the student replaced c with x, which isn't the hypotenuse

The hypotenuse is 13, so c should be 13, not x

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Jocelyn invested $390 in an account paying an interest rate of 2.7%

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Answer:

There will be $634.05 in the account.

Step-by-step explanation:

Compound interest:

The compound interest formula is given by:

$A(t) = P(1 + \frac{r}{n})^{nt}$

Where A(t) is the amount of money after t years, P is the principal(the initial sum of money), r is the interest rate(as a decimal value), n is the number of times that interest is compounded per year and t is the time in years for which the money is invested or borrowed.

$390 in an account paying an interest rate of 2.7% compounded daily.

This means that $P = 390, r = 0.027, n = 365$