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Percentages Normal Distribution (areas And Probabilities)

03/20/22

In a qualifying exam for admittance, the mean score was 75 and the standard deviation was 8. 1.) What percent of those who took the qualifying exam got at least 90?

These are additional questions because there's a limit hahah2.) If there are 150 students who took the qualifying exam, how many students got at least 90?3.) If 40 students scored between 60 and... more

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Percentages Statistics Probability Fractions

03/09/22

Probability of winning

If I purchase 10 lottery tickets, with 44,020 prizes to be won and 1,100,000 total tickets sold, what are my odds of winning?

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Percentages Algebra 1 Algebra 2 Calculus

03/09/22

purchasing power

If only salary increases by 20%, purchasing Power will also increase by 20%. However, if inflation increases prices by 20%, Purchasing Power does not decrease by 10%, but by 16.6…% (given that... more

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Percentages Algebra 1 Algebra 2 Calculus

03/07/22

cool question about interest rates

Rob has the opportunity to invest in two different Project Finance projects. The first project is a railroad that will pay monthly interest of $100.00 for 3 years, with a one-year grace period... more

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Percentages Economics Algebra Macroeconomics

03/06/22

percentages - price increase of products

A merchant sells a box of goods for $100.00. If he raises all the prices of the products in the box by 20%, what happens to the total value of the box?a) Remains the sameb) Increases 20%c)... more

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Percentages Fractions

01/20/22

Santas Reindeer need to eat!!!

If Santa has 9 reindeer and 5/6 of a bag of food left, how much of the bag will each reindeer get if divided equally

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Percentages Math

11/22/21

Esteban has a big jar of change in his room. He has 600 coins total, and 240 of them are pennies. What percentage of the coins are pennies?

What percentage of the coins are pennies?

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Percentages Investing Problem Returns

11/22/21

Vary invested for equal return quantity

I have $300,000 to disburse among 8 different stocks. The interest earned are 343%, 36%, 35%, 32%, 9%, 9%, 6% and 3%. The amount invested in each needs to be determined, which will vary in... more

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Percentages Fractions Decimals

10/18/21

Fair, or Not Fair, that is the Question?

The Blackman Bears are competing in a grueling 12-mile relay race. Coach Thompson met with the four-member team and gave them the following instructions: Martin will run 25 % of the entire... more

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Percentages Math

06/24/21

What is 2 more than 20% of 80?

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Percentages Probability Elementary Math Averages

05/04/21

There are 16 Students in a class

There are 16 students in a class and two people missed a recent quiz. The class average before the two absent students made up the quiz was 92%. When the two students made up the quiz, one earned a... more

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Percentages Basic Math

03/01/21

Math Problem. I was away and I am oblivious and freaking out please help. ;-;

You have decided to look at a car that is listed for $12,000. After test driving the vehicle, you decide to purchase the vehicle. 3. Sales tax for the vehicle is 13%. Including sales tax, what will... more

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Percentages Math Calculus Physics

02/23/21

One side of a right triangle is known to be 20 cm long and the opposite angle is measured as 30 ◦ , with a possible error of ± 1 . 2%, what is the error and percentage error?

Use differentials to estimate the error in computing the length of the hypotenuse and what is the percentage error?

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Percentages

11/18/20

A book sold 39,600 copies in its first month of release. Suppose this represents 6.7 percent of the number of copies sold to date. How many copies have been sold to date?

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Percentages Algebra 2 Statistics

05/16/20

The scores on a test are normally distributed with a mean of 80 and a standard deviation of 5. Twelve students had test scores between 80 and 90. Estimate the number of students who took the test.

The score range is between 0 to 100.

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Percentages Accounting Finance Maths

01/10/20

Averaging percentages

How do you find the average for 3 percentages?

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Percentages Algebra Ratios Mixtures

01/03/20

How to change mixture for a solution with a given ratio?

I have a mixture with 70% of one composite element and 30% of another composite element. I want to change the mixture to 50%/50% and the total weight to be 1kg or 1,000g.How much of the 30%... more

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Percentages Algebra Word Problem

10/23/19

An international company has 21,400 employees in one country. If this represents 23.7% of the country, how many employees does it have in total?

ROUND YOUR ANSWER TO THE NEAREST WHOLE NUMBER

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Percentages Math Prealgebra

09/27/19

Help me settle an argument

If I loan my friend 26 cents and he uses that 26 cents to buy a 10,000 yacht, how much of that yacht will I own?

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Percentages Math Numbers Middle School

09/12/19

What is 128.1 as a percentage of 91.5.

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Percentages Chemistry Geology

07/13/19

Rock age by finding using elements and percentages

Certain element has a half life of 2.5 billion years..15% of the original element remains. The other 85% decayed into lead. How old is the rock? Analysis of another rock shows that it contains 65%... more

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Percentages Math Precalculus Algebra

07/13/19

How to determine interest and payment sizes?

Jennifer borrowed $3000 from the bank in order to buy a new jacuzzi. She will pay it off by equal payments at the end of each week for 4 years. The annual interest rate is 8.05%. Determine the... more

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Percentages Algebra 1 Division

06/12/19

Any reason to use division while finding a percentage?

6960.66 + 4% = 7,239.09I was told this is wrong and I should have done the math like this:6960.66 divided by .96 = 7250.68Why is this? Is the person who is telling me this wrong? I've never... more

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Percentages Prealgebra Finance

05/27/19

A salesperson is paid $380 per week plus a 2.2% commission. What is the person's sales total if the gross pay for a given week is $1,395?

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Percentages Prealgebra

05/26/19

Word problem on money, percentages and tax

Hi can you help me solve this question? It goes like this I think I'm not fully sure thoughA man imports models from china it costs him $5.95 per model, he also has to pay 5% tax per import. He... more

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In a qualifying exam for admittance, the mean score was 75 and the standard deviation was 8. 1.) What percent of those who took the qualifying exam got at least 90?

Probability of winning

purchasing power

cool question about interest rates

percentages - price increase of products

Santas Reindeer need to eat!!!

Esteban has a big jar of change in his room. He has 600 coins total, and 240 of them are pennies. What percentage of the coins are pennies?

Vary invested for equal return quantity

Fair, or Not Fair, that is the Question?

What is 2 more than 20% of 80?

There are 16 Students in a class

Math Problem. I was away and I am oblivious and freaking out please help. ;-;

One side of a right triangle is known to be 20 cm long and the opposite angle is measured as 30 ◦ , with a possible error of ± 1 . 2%, what is the error and percentage error?

A book sold 39,600 copies in its first month of release. Suppose this represents 6.7 percent of the number of copies sold to date. How many copies have been sold to date?

The scores on a test are normally distributed with a mean of 80 and a standard deviation of 5. Twelve students had test scores between 80 and 90. Estimate the number of students who took the test.

Averaging percentages

How to change mixture for a solution with a given ratio?

An international company has 21,400 employees in one country. If this represents 23.7% of the country, how many employees does it have in total?

Help me settle an argument

What is 128.1 as a percentage of 91.5.

Rock age by finding using elements and percentages

How to determine interest and payment sizes?

Any reason to use division while finding a percentage?

A salesperson is paid $380 per week plus a 2.2% commission. What is the person's sales total if the gross pay for a given week is $1,395?

Word problem on money, percentages and tax

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