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liraira [26]
3 years ago
6

Find the simple interest earned by each account. $1,200 principal at 5.5% interest for 25 years

Mathematics
2 answers:
Tanzania [10]3 years ago
6 0

Answer:

$1650

Step-by-step explanation:

Simple interest=principal×time×rate/100

Principal=$1200

Time=25years

Rate=5.5%

S.I=1200×25×5.5/100

S.I=12×25×5.5

S.I=1650

So the simple interest is $1650

zhuklara [117]3 years ago
4 0

Answer:

The simple interest is $1650

Step-by-step explanation:

Simple Interest = PRT/100

where p = principal, r = rate and t = time

p = $1200, r = 5.5%, and t = 25 years

SI = (1200*5.5*25)/100

SI = 12*5.5*25

SI = $1650

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Answer:

The 95% confidence interval estimate for the population mean force is (1691, 1755).

Step-by-step explanation:

According to the Central Limit Theorem if we have an unknown population with mean μ and standard deviation σ and appropriately huge random samples (n > 30) are selected from the population with replacement, then the distribution of the sample mean will be approximately normally.

The sample selected here is <em>n</em> = 30.

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Compute the sample mean and standard deviation as follows:

\bar x=\frac{1}{n}\sum x=\frac{1}{30}\times 51702=1723.4\\\\s=\sqrt{\frac{1}{n-1}\sum (x-\bar x)^{2}}=\sqrt{\frac{1}{30-1}\times 232561.2}=89.55

Construct a 95% confidence interval estimate for the population mean force as follows:

CI=\bar x\pm z_{\alpha /2}\times\frac{s}{\sqrt{n}}

    =1723.4\pm 1.96\times\frac{89.55}{\sqrt{30}}\\\\=1723.4\pm 32.045\\\\=(1691.355, 1755.445)\\\\\approx (1691, 1755)

Thus, the 95% confidence interval estimate for the population mean force is (1691, 1755).

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