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user100 [1]
4 years ago
8

I'm not asking for an answer, but trying to understand how to set this formula.

Mathematics
2 answers:
Delvig [45]4 years ago
8 0
A = P(1 + r/n)nt
Amount = Principal (1 + interest rate in decimal form divided by number of times interest is compounded per year)number of years
Amount = $900,000 (1 + 4.8/12)20
HACTEHA [7]4 years ago
4 0
The formula of the present value of annuity ordinary
Pv=pmt [(1-(1+r/k)^(-kn))÷(r/k)]
To find the monthly payment solve for pmt
Pmt=pv÷[(1-(1+r/k)^(-kn))÷(r/k)]
Pv 900000
R 0.048
K compounded monthly 12
N 20 years

Pmt=900,000÷((1−(1+0.048÷12)^(
−12×20))÷(0.048÷12))
=5,840.62
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The function C(x) = 25.50x + 50 models the total cost for a cleaning company to clean a house, where x is the number of hours it
vodomira [7]

Answer:

<em>The average rate of change is $25.5 per hour, option B.</em>

Step-by-step explanation:

<u>Average Rate of Change </u>

When we are explicitly given some function C(x), we sometimes need to know the rate of change of C when x goes from x=x_1 to x=x_2. It can be computed as the slope of a line .

\displaystyle m=\frac{C(x_2)-C(x_1)}{x_2-x_1}

The provided function is

C(x)=25.50x + 50

We are required to compute the average rate of change between the points

x_1=3\ ,\ x_2=9

Let's compute

C(3)=25.50(3) + 50=126.5

C(9)=25.50(9) + 50=279.5

\displaystyle m=\frac{279.5-126.5}{9-3}

\displaystyle m=\frac{153}{6}=25.5

The average rate of change is $25.5 per hour, option B.

7 0
4 years ago
Ryan is buying cherries that cost $1.92 per pound. If he buys 1/5 pounds of cherries, how much will it cost him?
Flura [38]

you do 1 divided by 5

it would be 0.2


8 0
3 years ago
Determine the discriminant for the given equation x^2+4x+5=0. Then describe the roots(how many and what type).
Fed [463]

Discriminant = b^2 - 4ac, where a, b and c come from the form of the quadratic equation as ax^2 + bx + c

Discriminant = (4)^2 - 4(1)(5)
= 16 - 20
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-4 < 0, therefor there are no roots

(If the discriminant = 0, then there is one root
If the discriminant > 0, there are two roots, and if it is a perfect square (eg. 4, 9, 16, etc.) then there are two rational roots
If the discriminant < 0, there are no roots)
3 0
4 years ago
Daisy works at an ice-cream parlor. She is paid $10 per hour for the first 8 hours she works in a day. For every extra hour she
tester [92]

Answer:

The expression giving her net earnings for a day with more than 8 hours worked is X = 80 + 15H, where H means "extra hours worked".

Step-by-step explanation:

Given that Daisy works at an ice-cream parlor earning $10 per hour for the first 8 hours she works in a day, and 1.5 times her hourly wage for every extra hour she works, in order to know how much can she make in a day working more than 8 hours the following equation has to be made:

X = (8 x 10) + (H x (1.5 x 10))

X = 80 + 15H

Therefore, if Daisy works 13 hours, the equation works as follows:

X = 80 + 15x13

X = 80 + 195

X = 275  

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