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3 years ago

Armand deposited 389.42 in a savings account that earns 3.2% simple interest what is Amands account balance after seven years

Mathematics

1 answer:

Vinvika [58]3 years ago

5 0

Account balance = $389.42 + $389.42 (0.032) (7)

$389.42 + $87.23 = $ $476.65 (answer)

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<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B%20-%202.68%20-%203.57%7D%7B%28%20-%2012.5%20%5Ctimes%200.4%29%7D%20" id="TexForm

Maslowich

Answer:

The answer is 0.125

Step-by-step explanation:

-2.68 - 3.57 ÷ (-12.5 × 4)

-6.25 ÷ (-50)

6.25 ÷ 50 = 0.125

Thus, The answer is 0.125

<em><u>-TheUnknownScientist</u></em>

4 0

3 years ago

Read 2 more answers

For the function below, find a formula for the upper sum obtained by dividing the interval [a comma b ][a,b] into n equal subin

Vlad [161]

Answer:

See below

Step-by-step explanation:

We start by dividing the interval [0,4] into n sub-intervals of length 4/n

$[0,\displaystyle\frac{4}{n}],[\displaystyle\frac{4}{n},\displaystyle\frac{2*4}{n}],[\displaystyle\frac{2*4}{n},\displaystyle\frac{3*4}{n}],...,[\displaystyle\frac{(n-1)*4}{n},4]$

Since f is increasing in the interval [0,4], the upper sum is obtained by evaluating f at the right end of each sub-interval multiplied by 4/n.

Geometrically, these are the areas of the rectangles whose height is f evaluated at the right end of the interval and base 4/n (see picture)

$\displaystyle\frac{4}{n}f(\displaystyle\frac{1*4}{n})+\displaystyle\frac{4}{n}f(\displaystyle\frac{2*4}{n})+...+\displaystyle\frac{4}{n}f(\displaystyle\frac{n*4}{n})=\\\\=\displaystyle\frac{4}{n}((\displaystyle\frac{1*4}{n})^2+3+(\displaystyle\frac{2*4}{n})^2+3+...+(\displaystyle\frac{n*4}{n})^2+3)=\\\\\displaystyle\frac{4}{n}((1^2+2^2+...+n^2)\displaystyle\frac{4^2}{n^2}+3n)=\\\\\displaystyle\frac{4^3}{n^3}(1^2+2^2+...+n^2)+12$

but

$1^2+2^2+...+n^2=\displaystyle\frac{n(n+1)(2n+1)}{6}$

so the upper sum equals

$\displaystyle\frac{4^3}{n^3}(1^2+2^2+...+n^2)+12=\displaystyle\frac{4^3}{n^3}\displaystyle\frac{n(n+1)(2n+1)}{6}+12=\\\\\displaystyle\frac{4^3}{6}(2+\displaystyle\frac{3}{n}+\displaystyle\frac{1}{n^2})+12$

When $n\rightarrow \infty$ both $\displaystyle\frac{3}{n}$ and $\displaystyle\frac{1}{n^2}$ tend to zero and the upper sum tends to

$\displaystyle\frac{4^3}{3}+12=\displaystyle\frac{100}{3}$

8 0

3 years ago

The cost of a blackberry phone at John's Electrontics is $249.99. this cost includes a twelve percent sale tax. How much is the

slamgirl [31]

Answer:

$219.99

Step-by-step explanation:

To find the price without the sale tax you find the opposite of 12%, which would be 88%. Then you multiply .88 by 249.99 to get 219.9912, and since it is money you round to the hundreth to get 219.99.

5 0

3 years ago

Y’all I’m bored what y’all wanna do?

charle [14.2K]

Answer: eat, sleep, and watch anime

Step-by-step explanation: :)

4 0

2 years ago

Read 2 more answers

compare the pair of fractions below. match the statements to the correct symbol. each symbol may be used more than once or not a

Lelu [443]

3/7 is equal to 9/21 because when you simplify 9/21 you can divide both 9 and 21 with 3 so you would get 3/7
hope this helps

4 0

3 years ago