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Andrews [41]
3 years ago
5

Pls help brain list it's a big grade

Mathematics
1 answer:
nydimaria [60]3 years ago
4 0

Answer:

Dam that looks hard.

Step-by-step explanation:

Good luck!

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A student saves $3 dollars on August 1, $5 on August 2, $7 on August 3, and so on. How much will she save in August 20 ?
Delvig [45]
Here is your answer

Money saved on each successive day is-

$3, &5, $7....

Clearly it forms an AP,

where

a1= 3

common difference, d= 2

n=20

So,

using formula

Tn= a1+(n-1)d

T20= 3+(20-1)2

= 3+ 19×2

= 3+ 38

=41

So, money saved on August 20= $41

Sum of money saved upto August 20 =
n/2 (a1+T20)
= 20/2 (3+41)
= 10× 44
= $440

HOPE IT IS USEFUL
5 0
3 years ago
Read 2 more answers
Which of the following numbers can be expressed as repeating decimals?
GalinKa [24]

Answer:

It's \frac{2}{9} and \frac{5}{6}

3 0
2 years ago
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A cone has a radius of 1 foot and a height of 2 feet. How many comes of Liquid would it take to fill a cylinder with a diameter
maks197457 [2]

find the volume of the cone:

1/3 pi r squared × h

1/3 pi (1) squared × 2

= 2/3 Pi (feet cubed)

find the volume of the cylinder:

pi r squared × h

(the radius is 1 foot because its half the diameter which is 2 feet)

pi (1) squared × 2

= 2 Pi (feet cubed)

2 Pi is÷ 2/3 Pi

= 3

therefore it will take 3 cones of liquid to fill a cylinder with a diameter of 2 and height of 2

7 0
2 years ago
I am thinking of a number that is at most 13.
zmey [24]

Answer:

you are thinking the number 10

8 0
2 years ago
I want to calculate APR for Automobile Loans without a calculator, but I struggle with division. Could someone please explain th
vfiekz [6]

Explanation:

Of all the variables in an amortization formula, the interest rate is the one that cannot be solved for. Finding APR for a given loan is generally an iterative process, or one that can be done by many spreadsheets, graphing calculators, and on-line tools.

The formula for the value of a monthly loan payment A on principal P, for t years, at interest rate r is ...

  A = P(r/12)/(1 -(1 +r/12)^(-12t))

but that is of no direct help in finding APR.

__

This formula can be used to develop relations that can approximate APR. The formulas below are for different loan lengths, and will be accurate to 2 decimal places of APR value for APRs in the range of 0 to 15%.

They work like this:

  Find the ratio of total loan repayment cost to the principal amount of the loan. (Division is required for this.) It will generally be a number between 1 and about 1.5 for auto loans of reasonable duration.

Use that value for x in the expression corresponding to the loan length. The range of output from these formulas is from 0 to 15, meaning the APR is 0% to 15%.

<em>APR Formulas</em>

<u>2-year loan</u>

  APR = ((((8.03501x - 53.6947)x + 153.636)x - 248.528)x + 306.753)x -166.201

<u>3-year loan</u>

  APR = ((((4.37626x - 30.7798)x + 92.6767)x - 157.555)x + 203.183)x -111.901

<u>4-year loan</u>

  APR = ((((2.7783x - 20.3207)x + 63.6117)x - 112.328)x + 150.19)x -83.9314

<u>5-year loan</u> (note the leading minus sign)

  APR = ((((( -1.28076x + 11.1732)x - 42.3671)x + 91.6612)x - 125.977)x + 137.601)x -70.8105

<u>6-year loan</u> (note the leading minus sign)

  APR = (((((-0.864078x + 7.82602)x - 30.8075)x + 69.1893)x - 98.6637)x + 111.919)x -58.599

<em>Example</em>

You want to borrow $22,175, and you're told that your monthly payment amount on a 4-year loan would be $512.99. Your total repayment is ...

  $512.99×48 = $24,623.52

Dividing this by the amount you borrowed, you get a ratio of ...

  24,623.52/22,175 ≈ 1.1104

Using this value in the formula for the 4-year loan APR, we make the following calculations:

   APR = ((((2.7783(1.1104) - 20.3207)(1.1104) + 63.6117)(1.1104) - 112.328)(1.1104) + 150.19)(1.1104) -83.9314

     = (((-17.2357)(1.1104) + 63.6117)(1.1104) - 112.328)(1.1104) + 150.19)(1.1104) -83.9314

     = (((44.4732)(1.1104) - 112.328)(1.1104) + 150.19)(1.1104) -83.9314

     = ((-62.945)(1.1104) + 150.19)(1.1104) -83.9314

     = (80.2959)(1.1104) -83.9314

     = 5.2292

  APR = 5.23 . . . percent (result should be rounded to 2 decimal places)

__

<em>Comment on formula evaluation</em>

It is tedious, but necessary, to keep 4 decimal places of precision in each of the intermediate calculations, rounding where required. These formulas are taking relatively small differences of relatively large numbers, so the best reasonable precision should be maintained in all calculations. The final answer should be rounded to 2 decimal places.

These computations can be done by hand, but a calculator or spreadsheet is immensely helpful.

6 0
3 years ago
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