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3 years ago

Find the circumference. (In terms of pi)

Mathematics

1 answer:

jeka943 years ago

4 0

16*pi

Solution:

Formula for circumference of a circle: 2*pi*r

2*pi*8= 16*pi

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I need to fine the height of a triangular pyramid and I already have the volume and Area

Keith_Richards [23]

I’m not sure, but i think that you have to take the volume equation, and plug in the other variables (volume, area) to find the height

6 0

3 years ago

Jax has a weekly math test. His scores on the last 5 tests are 78,92,86,94,95. What score does he need to have an average of 90

lara [203]

Answer:

x = 95

Step-by-step explanation:

Given that,

Jax scores on the last 5 tests are 78,92,86,94,95.

We need to find the score he need to have an average of 90.

The formula for average of few number is given by :

Average = sum of observations/total no of observation

Let he score x in test 6. So,

$90=\dfrac{78+92+86+94+95+x}{6}\\\\90=\dfrac{445+x}{6}\\\\540=445+x\\\\x=95$

So, he must score 95 in the next test so that its average is 90.

5 0

3 years ago

Find the perimeter of the rectangle.

algol13

All you have to do is find the length of the sides using the distance formula and then add the lengths together to find the perimeter

8 0

3 years ago

Sarah Wiggum would like to make a single investment and have $1.7 million at the time of her retirement in 34 years. She has

vovangra [49]

Answer:

Sarah has to invest $502,958.58 today.

Step-by-step explanation:

This is a simple interest problem.

The simple interest formula is given by:

$E = P*I*t$

In which E is the amount of interest earned, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time.

After t years, the total amount of money is:

$T = E + P$

In this question:

$t = 35, I = 0.07, T = 1700000$

She has to invest P today.

$T = E + P$

$1700000 = E + P$

$E = 1700000 - P$

$E = P*I*t$

$1700000 - P = P*0.07*34$

$3.38P = 1700000$

$P = \frac{1700000}{3.38}$

$P = 502958.58$

Sarah has to invest $502,958.58 today.

8 0

3 years ago

Marci has taken out a loan of $5,000 for a term of 24 months (2 years) at an interest rate of 8.5%. Use the amortization table p

andreyandreev [35.5K]

Answer:

$227.30
$455.20

Step-by-step explanation:

The table tells you that Marci's monthly payment on a 2-year loan at 8.5% will be $45.46 on each $1000 borrowed. For her $5000 loan, her monthly payment will be 5 times the table value, or ...

monthly payment = $5000/$1000 × $45.46

monthly payment = $227.30

Her total of 24 payments will be ...

total repaid = 24 × $227.30 = $5,445.20

That amount is $445.20 more than the amount borrowed, so that is Marci's finance charge.

Marci's monthly payment will be $227.30, and her total finance charge will be $455.20.

6 0

3 years ago