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3 years ago

Calculate the Simple Interest on $12000 for 15 years at 12 1/2% per annum

Mathematics

1 answer:

Igoryamba3 years ago

3 0

Answer:

$22500

Step-by-step explanation:

principal=$12000

time=15 years

rate= $12\frac{1}{2}$

=12*2+1/2

=25/2

=12.5

Interest=PTR/100

=$12000*15*12.5/100

=$2250000/100

=$22500

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Q26. Division A has 15 students and division B has 20 students. Average score of students in division A is greater by 2 as compa

Romashka [77]

Step-by-step explanation:

Let a be the total score of Div. A

Let b be the total score of Div. B

given,

$\frac{a}{15} - \frac{b}{20} = 2$

as equation 1.

and

$b - a = 160 \\ - a + b = 160$

as equation 2.

Now multiply equation 2 by 1/20 to eliminate b to solve for a.

$( - a)( \frac{1}{20} ) + (b)( \frac{1}{20} ) = ( \frac{1}{20} )(160) \\ - \frac{a}{20} + \frac{b}{20} = 8$

take this new equation as equation 3.

now we will use equation 1 + equation 3 to eliminate b to solve for a.

$( \frac{a}{15} + ( - \frac{a}{20} )) + ( - \frac{b}{20} + \frac{b}{20} ) = 2 + 8 \\ \frac{a}{60} = 10 \\ a = 60 \times 10 \\ = 600$

Div.A total score = 600

Average Score = Total Score / Number of students.

$\frac{600}{15} \\ = 40$

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3 years ago

One group, which contains 28 dogs, averages 20.5 inches. Another group that contains 19 dogs, averages 32.1 inches.

gtnhenbr [62]

Answer:

The average height of poodles in your kennel is 25.19 inches.

Step-by-step explanation:

This is a weighed average problem.

To find the weighed average, we sum each value of the set multiplied by it's weight, and then we divide by the sum of the weights.

In this problem, we have that:

Average 20.5 inches has weight 28.

Average 32.1 inches has weight 19.

What is the average height of poodles in your kennel?

$A = \frac{32.1*19 + 20.5*28}{19+28} = \frac{1183.9}{47} = 25.19$

The average height of poodles in your kennel is 25.19 inches.

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4 years ago

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Step-by-step explanation:

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3 years ago

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solution :
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