What is 2/3 of 800 equal to?

Answers

Answer 1

Answer: In math "of" means times, so...

2/3 of 800 =
2/3 × 800 =
1600/3 = 533 1/3

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(2a2 + a + 3) ÷ (a - 1)

Answers

Final answer is: 5a+3/a-1

Answer: 5a+3/a-1

Key: “/“ is a fraction bar
Key: 5a+3 is the numerator
Key: a-1 is the denominator

Hope this helps! <3

Work out2 3/14+3 4/14

Answers

Answer:

$5 (1)/(2)$

Step-by-step explanation:

=> $2(3)/(14) + 3(4)/(14)$

=> $(31)/(14) + (46)/(14)$

=> $(31+46)/(14)$

=> $(77)/(14)$

=> $5(7)/(14)$

=> $5 (1)/(2)$

Answer:

51/2

please see the attached picture forfullsolution..

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Good luck on your assignment

Jill invested $500 in an account with a compound interest rate of 6%. Cheryl invests $600 in an account with a compound interest rate of 4%.Find out in how many years each doubles her money. Using the rule of 72, es025-1.jpg, what is the difference in the number of years to double their money?

Answers

Answer:

Jill doubles her money in 12 years.

Cheryl doubles her money in 18 years.

Difference = 6 years.

Step-by-step explanation:

We have been given that Jill invested $500 in an account with a compound interest rate of 6%. Cheryl invests $600 in an account with a compound interest rate of 4%.

Since the rule of 72 states that to find the number of years it will take an amount to double, we should divide 72 by the annual interest rate.

Let us find the time it will take to double Jill's money by dividing 72 by 6 as annual interest rate is 6%.

$\text{Time it will take to double Jill's money}=(72)/(6)$

$\text{Time it will take to double Jill's money}=12$

Therefore, it will take 12 years to double Jill's money.

Now we will divide 72 by 4 to find the time it will take to double Cheryl's money.

$\text{Time it will take to double Cheryl's money}=(72)/(4)$

$\text{Time it will take to double Cheryl's money}=18$

Therefore, it will take 18 years to double Cheryl's money.

To find the difference in the number of years to double their money we will subtract 12 from 18.

$\text{The difference in the number of years to double their money}=\text{18 years - 12 years}$

$\text{The difference in the number of years to double their money}=\text{6 years}$

Therefore, the difference in the number of years to double their money is 6 years.

72/6 = 12
72/4 = 18
18 - 12 = 6 ← the answer.

Find the diameter of the base of a right cylinder if the surface area is 128(pi) and the height is 12cm.

Answers

$d=2r\n A=128 \pi \n A=2 \pi r^(2) +2 \pi rh \n\n 2 \pi r^(2) +2 \pi rh = 128 \pi \n 2 r^(2) +2rh = 128\n 2 r^(2)+24r-128=0\n r^(2)+12r-64=0\n delta=400\n r_(1/2) = -16/4 \n r=4cm\n d=8cm\n$

Radius / diameter as a length cannot be negative, that's why '-16' is wrong.

Which of the following statistical measures is least appropriate for describing the data set shown below? 1, 5, 5, 5, 6, 6.5, 7, 30

mean
mode
median

Answers

arrange data set in ascending order

1, 5, 5, 5, 5, 6, 6, 7, 30

mean = 7.78
mode = 5
median = 5

The least appropriate measure for describing the data set is MEAN. This is because it is affected by the outlier, 30.

Answer:

Short answer shorter, its A: mean

Step-by-step explanation:

What is 5.2E11 in scientific notation

Answers

5.2E11 is the equivalent of scientific notation when you use a calculator.

5.2 x 10¹¹ is its written form.

5.2 is the coefficient.
10 is the base
11 is the exponent

5.2 x 10¹¹ in standard form is 520,000,000,000

You're going to multiply by a factor of 11 or move the decimal place 11 places over to the right. Your answer is 520,000,000,000 or 520 billion.

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