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olasank [31]
3 years ago
10

Interest rate 6.5%, time 18 months, simple interest $828.75 what is the principal

Mathematics
2 answers:
marishachu [46]3 years ago
6 0

Answer:

The principal is $8500.

Step-by-step explanation:

The simple interest formula is given by:

E = P*I*t

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

In this problem, we have that:

E = 828.75, I = 0.065, t = 1.5

E = P*I*t

828.75 = 1.5*0.065P

P = 8500

The principal is $8500.

gogolik [260]3 years ago
3 0
Use the formula for simple interest:

i = p*r*t

Then    i = ($828.75)(0.065)(1.5)
              = $80.80

6.5% must be converted to a decimal fraction:  0.065, and 18 months to years, specifically 1.5 years.
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A 99% confidence interval for the population mean of high school students that take the bus to school every day is b) ci=(44.34%, 54.43%)

We need to find the 99% confidence interval for the population mean of high school students that take the bus to school everyday

A confidence interval is a range of estimates for an unknown parameter. The confidence interval is calculated at the specified confidence level; the most common is the 95% confidence level, but sometimes other levels are used, such as 90% or 99%.

The confidence interval of proportions is given by:

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The confidence interval is given by

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<u>Learn more about confidence interval:</u>

brainly.com/question/28052710

# SPJ4

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