All categories

3 years ago

Joan invests $800 at 12 1/2% per annum compound interest monthly.What is the amount of interest at the end of the first year?

Mathematics

1 answer:

amm18123 years ago

4 0

Answer:

Interest at the end of the first year is $105.93

Step-by-step explanation:

$800 at 12.5% APR compounded monthly.

Interest at the end of the year

= $800 *( (1+0.125/12)^12 - 1 )

= $800 * 0.132416

= $105.93

You might be interested in

Four times the difference of a number and seven is 32

disa [49]

As a formula, you're saying 4*(n-7)=32

This solves to n-7 = 8, so n=15

5 0

3 years ago

Flying against the wind, an airplane travels 7520 kilometers in 8 hours. Flying with the wind, the same plane travels 6500 kilom

bezimeni [28]

Answer:

Rate of plane in still air = 1120 km/h

Rate of wind = 180 km/h

Step-by-step explanation:

Let the rate (speed) of the plane in still air = u km/h

Let the rate (speed) of the wind = v km/h

Formula for speed is:

$Speed = \dfrac{Distance}{Time}$

Given that against the wind, airplane travels 7520 km in 8 hours.

The speed against the wind will be slower so,

Against the wind, speed = (u -v ) km/h

Using above formula:

$(u-v) = \dfrac{7520}{8} km/h\\(u-v) = 940 km/h ..... (1)$

Given that with the wind, airplane travels 6500 km in 5 hours.

The speed with the wind will be faster so,

With the wind, speed = (u +v ) km/h

Using above formula:

$(u+v) = \dfrac{6520}{5} km/h\\(u+v) = 1300 km/h ..... (2)$

Adding (1) and (2) to solve for u and v:

$2u = 2240\\\Rightarrow u = 1120\ km/h$

Putting u in (1):

$1120-u=940\\\Rightarrow u = 180\ km/h$

So, the answers are:

<em>Rate of plane in still air = 1120 km/h</em>

6 0

3 years ago

Which of the following equations does not represent a linear relationship between x and y

Ksenya-84 [330]

A linear relationship is an equation that has a constant slope

The equation that does not represent a linear relationship is (b) y = 2x^2 + 5x

<h3>How to determine the non-linear relationship</h3>

A linear equation can take any of the following forms:

y = mx + b

y - y1 = m(x - x1)

Ax + By = c

Any form different from the above forms is not a linear equation

Using the above format as a guide, the equation that does not represent a linear relationship is (b) y = 2x^2 + 5x

Read more about linear relationships at:

brainly.com/question/15602982

7 0

2 years ago

9. w +w+w+w:<br> I’m a little stuck

lara31 [8.8K]

Answer:

Step-by-step explanation:

pretty simple, i am sure you know the answer, as you add all the variables=

=4w

6 0

3 years ago

Is the given point interior, exterior, or on the circle (x + 2)2 + (y - 3)2 = 81?<br><br> R(6, 3)

Arte-miy333 [17]

I think it is interior

5 0

2 years ago

Read 2 more answers