Saturday

January 31, 2015

January 31, 2015

Number of results: 100,343

**Math**

You searched for: Many states are carefully considering steps that would help them collect sales taxes on items purchased through the internet. how many randomly selected sales transactions must be surveyed to determine the percentage that transpired over the internet/ Assume ...
*July 10, 2012 by Katia Mastrotti*

**percentages**

Hi I want to know what one amount is a percentage of another example what is 0.74 and a percentage of 4.91 thanks What is the percentage of .74 of 4.01? percent= .74/4.02 * 100 Thank You !!!!!!
*October 2, 2006 by ron*

**Statistics**

A Gallup Poll reported the percentage of Americans who approve of the President's job performance was 47% with a margin of error of 2 percentage points. What is a 95% confidence interval for the population percentage? A. 41% to 53% B. 45% to 49% C. 46% to 48% D. 43% to 51%
*May 18, 2012 by Mary*

**math-calculus**

The following equation shows the approximate relationship between the percentage y of total personal consumption spent on food and the corresponding percentage x spent on education. y = 38/x^0.38 percentage points; (6.5 ≤ x ≤ 17.5). According to the model, spending...
*December 20, 2012 by Trisha*

**math**

I need to find what 0.10 is a percentage of 0.72. and what 0.10 is a percentage of 0.62. Please help asap!!!!!
*June 29, 2010 by shaista*

**Economics**

What happens to the percentage of an income that is taxed when income rises and the tax is a proportional one? A. The percentage of tax falls. B. The percentage of tax rises. C. The percentage rises and then falls. D. The percentage of tax stays the same. I'm guessing the tax ...
*June 4, 2012 by Anonymous*

**math percentage diff**

a value of 2.40 increased to 4.48 in 5 years. what is the change in percentage each year? this one was difficult to figure out..
*March 24, 2010 by danny*

**math**

about what percentage of the population believe saying F to ber true? = what percentage of 250148571.0 = 136,800,000?
*October 29, 2012 by Anonymous*

**Math**

A clothing retailer purchased a line of fall leather coats which were priced to sell at $600 each. This price reflected a markup of 45% on the selling price. At the end of the season the retailer had three coats left, which were marked down to 25% and sold. What was the ...
*December 12, 2013 by Anonymous *

**Statistics**

Many states are carefully considering steps that would help them collect sales taxes on items purchased through the Internet. How many randomly selected sales transactions must be surveyed to determine the percentage that transpired over the Internet? Assume that we want to be...
*June 30, 2014 by Kasey*

**statistics**

many states are considering steps that would help them collect sales taxes on items purchased through the internet. how many randomly selected sales transactions must be surveyed to determine the percentage that transpired over the internet? assume that we want to be 99 ...
*May 8, 2010 by camera*

**Math-statistics**

Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantiles: a.percentage of scores less than 100 b. relative frequency of scores less than 120 c. percentage of scores less ...
*March 1, 2013 by Jane Brown*

**Marketing Math - markup/mark down**

A clothing retailer purchased a line of fall leather coats which were priced to sell at $600 each. This price reflected a markup of 45% on the selling price. At the end of the season the retailer had three coats left, which were marked down 25% and sold. What was the retailer'...
*May 5, 2013 by anonymous*

**Math**

Alice usually has a 80% shooting percentage in basketball. On Monday she scored 16 baskets in 22 attempts. If she scores her usual percentage on Tuesday by scoring 20 baskets, how many shots did she attempt?
*October 17, 2013 by Anonymous*

**Math**

Equation: t=5(logP/log0.5) P is the percentage of caffiene in the bloodstream related to t, time elapsed in hours Suppose you drink a cup of coffee at 9:00 a.m. What percentage of the caffiene will remain in your body at noon?
*January 12, 2015 by Zoe*

**Math**

How do you convert fractions to a percentage? give me an example and ill explain what is the percentage for 7/4? divide 7 by 4. 1.75 multiply by 100 175 7 is 175 percent of 4. so, 175% = 7/4?
*November 29, 2006 by Courtney*

**Math**

We are currently studying "earning money" for math. I read this sentence: When a store claculates its profit as a percentage of its cost price the profit is always bigger than the profit calculated as a percentage of the selling price. What does it mean and please give me an ...
*February 10, 2012 by Jason*

**Algebra1**

Please check these for me. 11. Find: 32 out of 38 in percentage 84.2% 12. Find: 41 out of 51 in percentage 80.3% 13. Find: 69 out of 70 in percentage 98.5% 14. Find: 32 out of 110 in percentage 29% 15. Find: 41 out of 40 in percentage 102.5% Thank you
*June 10, 2010 by y912f*

**statistics**

Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a.Percentage of scores less than 100b.Relative frequency of scores ...
*June 8, 2010 by Kim*

**excel graphing**

In column F (cell ranges F5:F16), use an appropriate formula to calculate the percentage of the grand total for each type of office supply. Format the results in the Percentage style. If necessary, decrease the decimal places to round the results to the nearest whole percent. ...
*May 31, 2011 by kayla*

**math (cant figure it out)**

Activity Boys Girls Total Walk 3 6 Bike 5 3 Skateboard 2 1 Total ______________ What percentage of the total students chose skateboarding? 10% 20% 30% none of these** . 4. What percentage of the boys chose walking? 30%* 45% 25% none of these . 5. What percentage of the ...
*April 20, 2014 by person *

**Math**

Suppose that the function represents the percentage of inbound e-mail in the U.S. that is considered spam, where x is the number of years after 2002. Use this model to approximate the percentage of spam in the year 2006 to the nearest tenth of a percent. Please show work.. ...
*December 10, 2008 by Anna*

**Math**

Are these correct ?. My grade counts on this and I'm not the best at math. I. Interest is ____?. (1pt) a. The amount of money your bank pays you for the use of only your money. b. The amount you might pay for a loan. * c. A percentage rate. d. All of the above. II. When ...
*October 22, 2014 by Alyii*

**math**

1.3:75 to a percentage 2.1:30 to a percentage 3.4/8 to a ratio 4.20/100 to a ratio 5.solve for x: 1.7:8 ::21:x 2.6:10::x:40
*September 19, 2012 by cleondra*

**Math Calculator help**

Assume that a normal distribution has a mean of 21 and a standard deviation of 2. Use the empirical rule to find the percentage of values that lie above 23. Now I did this on the Ti 83 by using Normalcdf(-5,1) and getting an answer of 0.84 and then 1-0.84 and I get about 15.9 ...
*November 25, 2011 by HM*

**math,percentage**

Ruzita bought 3kg of chicken.she used 0.75kg of the chicken to cook curry and another 0.13kg to stew w/ vegetables.what percentage of the chicken was not used?
*February 13, 2012 by kimi*

**percentage**

you have 50 students one day and 70 the next what is the percentage increase
*January 13, 2011 by Leon*

**math**

How do you figure the percentage of ratios for example 30:30 what would the percentage be? How do you divide them and what number do you divide by what number?
*November 12, 2009 by Brittani*

**statistics**

Using teh 68-95-99.7rule. Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: a. percentage of scores less than 100 b. relative frequency of scores less than 120 c...
*May 10, 2010 by Christine*

**Statistics**

Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of scores less than 100 b. Relative frequency of ...
*March 31, 2010 by Ab*

**auguta tech**

Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: a. Percentage of scores less than 100=50 percent b. Relative frequency of scores less than 120= 0.34+0.135+0....
*April 17, 2010 by cynthia*

**statistics**

Assume that a set of test scores is normally distrbuted with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first.... a. Percentage of scores less than 100. b. Relative frequency of ...
*May 8, 2010 by Renee*

**statistics**

Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of scores less than 100 b. Relative frequency of ...
*July 13, 2010 by Ab*

**statistics**

Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of scores less than 100 b. Relative frequency of ...
*August 20, 2011 by ann*

**Statistics... I need help**

. Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: (Hint: Make a drawing and label first) a. Percentage of scores less than 100 b. Relative frequency of scores ...
*April 19, 2010 by Adam*

**statistics**

Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: a. Percentage of scores less than 100 b.Relative frequency of scores less than 120 c.Percentage of scores less ...
*November 21, 2010 by TAW*

**Chemistry**

Can you help me understand how to review the math definition... what "percentage" means. I need to know what the total mass of the mixture of 42 grams of apples and 96 grams of oranges. ANd what is the percentage of mass the apples are? Thank you.
*September 9, 2014 by Hope*

**math**

How do you figure out a percentage with a fraction of a number. For example 66 2/3 of ________ = 74? change the percentage to a decimal or fraction. Lets do fraction: 66 percent is 2/3 2/3 * Number = 74 multiply both sides by 3/2 Number = 3/2 * 74
*February 21, 2007 by Shivangi*

**auguta tech**

a. Percentage of scores less than 100=50 percent b. Relative frequency of scores less than 120= 0.34+0.135+0.0235+0.015+0.84 c. Percentage of scores less than 140 d. Percentage of scores less than 80 e. Relative frequency of scores less than 60 f. Percentage of scores greater ...
*April 17, 2010 by cynthia*

**statistics**

Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of scores less than 100 = ...
*July 25, 2010 by Trish*

**statistics**

Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of scores less than 100 b...
*August 16, 2010 by sweet*

**stats**

Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of scores less than 100 b...
*September 20, 2010 by Jenn*

**statistic**

Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: a. Percentage of scores less than 100 b. Relative frequency of scores less than 120 ...
*August 24, 2011 by Sonia*

**biology**

A man with normal color vision marries a woman who is colorblind. What percentage of their sons would be colorblind, what percentage of their daughters would be colorblind, what percentage of their daughters would be carriers of the colorblind gene?
*March 31, 2011 by Andrew*

**Math**

I am having a hard time figuring this out. Can someone assist me in the right direction? Here is the problem: 5. When managing a business, it is important to take inventory of where your money is spent. You have a monthly budget of $5,000. Refer to the table below and answer ...
*April 7, 2010 by Sarah*

**Statistics**

Measurements on the percentage of enrichment of 12 fuel rods used in a nuclear reactor were reported as follows; 3.11 2.88 3.08 3.01 2.84 2.86 3.04 3.09 3.08 2.89 3.12 2.98 a. Test the Hypothesis H0: µ = 2.95 versus H1: µ 0 ≠ 2.95, and draw appropriate conclusions. Use ...
*July 18, 2012 by Josh*

**statistics**

3. Measurements on the percentage of enrichment of 12 fuel rods used in a nuclear reactor were reported as follows; 3.11 2.88 3.08 3.01 2.84 2.86 3.04 3.09 3.08 2.89 3.12 2.98 a. Test the Hypothesis H0: µ = 2.95 versus H1: µ 0 ≠ 2.95, and draw appropriate conclusions. ...
*July 19, 2012 by Mike*

**statics**

Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first…Drawings need not be included in response...
*May 3, 2010 by Anonymous*

**Math Ms. Sue Help plz!**

Activity Boys Girls Total Walk 3 6 Bike 5 3 Skateboard 2 1 Total _________________________________________ 3. What percentage of the total students chose skateboarding? (1 point) 10% 20% 30% none of these 4. What percentage of the boys chose walking? (1 point) 30% 45% 25% none...
*April 6, 2013 by Gabby*

**math**

Activity Boys Girls Total Walk 3 6 Bike 5 3 skateboard 2 1 3. What percentage of the total students chose skateboarding? (1 point) 10% 20% 30% none of these *** 4. What percentage of the boys chose walking? (1 point) 30% **** 45% 25% none of these 5. What percentage of the ...
*April 8, 2014 by Ms.sue HELP PLEASE!!!*

**Computer Science/Excel**

Here's the problem: John believes that the average American will be in debt forever. He decides to create a table that demonstrates this. He thinks that given 60 months (5 years) to get out of debt and the annual percentage rates 1-5 and 7-15 the percentage of the balance ...
*November 1, 2007 by Denise*

**Sociology (Stats) Std. Dev**

Given (μ) = 500, and σ = 100. What percentage of the SAT scores falls: A) Between 500 and 600? The percentage falls 1 σ above the (μ), 68.26% / 2 = 34.13% B) Between 400 and 600? The percentage falls 1 σ below and 1 σ above the (μ) C) Between...
*October 8, 2014 by Taylor*

**math**

Hi. What was the percentage increase in energy consumption from 1970-1988? In 1970 it was 66.4 and in 1988 it was 80.2 So I divide 80.2 by 66.4, right? So I get 1.2. Is the percentage increase 1.2%, .2%, 20% or 120%? Thanks!
*April 20, 2008 by Victor*

**math**

percentage increase for 2,556,000,000 to 6,279,000,000 do you divide to get percentage or subtract then divide by 2 confused on this one.
*October 8, 2009 by donavan*

**Economic**

Relative to people at the turn of the nineteenth century, people today spend A.a larger percentage of their income on clothing B. a smaller percentage of their income on clothing C. about the same percentage of their income on clothing D. about four times as much on clothing i...
*March 4, 2010 by pam*

**Statistics**

4. The Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. For each of the following problems: (a) draw a rough sketch, darkening in the ...
*November 22, 2014 by Kendra*

**Math -Data management Grade 12**

10 year old kids were asked to run around the track. Their times were normally distributed with a mean of 58.3 sec. and a standard deviation of 7.1 sec. a) What percentage of times will be less than 50 seconds? b) What percentage of times will be between 50 and 60 seconds?
*May 27, 2010 by Madmazel*

**Math**

the time required for one complete oscillation of a pendulum is called its period. if the length L of the pendulum is measured in feet and the period P n seconds, then the period is given by P=2¶(L/g)^1/2, where g is constant. use differentials to show the percentage error in ...
*July 8, 2014 by brandy*

**Chemistry+Percentage**

Calculate the percentage of water in each of the following hydrates. Aluminum bromide hexahydrate I just need help setting this up. I can work it from there Would it be: AlBr * 6H2O Did I write it right?
*January 14, 2009 by Chopsticks*

**CHEM**

A student used 10 mL water instead of 30 mL for extraction of salt from mixture. How may this change the percentage of NaCl extracted? My book says: % NaCl= (grams of NaCl / total grams of mixture) x 100 What I don't get is if it does change the percentage, why? It says the ...
*September 4, 2012 by Daisy*

**HEalth **

how much carboydrates we need in percentage in a day how much Fats we need in a day in percentage Why do we need fat how much percentage of protein we need what is complex carbohydreates
*October 20, 2011 by ZUICK*

**Chemistry**

1.) A 3.000gram sample of a hydrate compound containing Co, C2O4, and H2O was combusted to give 1.316g of Co3O4. What is the percentage of Cobalt in the oxide? 3.) 2.000 grams of a sample containing Co, C2O4, and H2O showed there to be 0.9621g of oxalate in the sample. Was is...
*March 3, 2013 by Robert*

**Statistics 15.34**

For the data below with y = touchdown percentage and x= interceiption percentage, determine and interpret the coefficients of correlation and determination. Rating TD% Inter% S. Young 96.8 5.6 2.6 K. Warner 95.7 5.5 3.5 D. Culpepper 93.2 5.4 3.1 P. Manning 92.3 5.6 3.1 J. ...
*June 16, 2010 by Julia Brown*

**fraction&percentage**

express each fraction as a percentage and round off to 2 decimal places. a)79/148 b)58/379 c)15/52 d)43/95
*February 13, 2012 by kimi*

**physics**

Percentage error in displacement time and mass are 2%, 1% and 3%. Find percentage error in the measurement of force.
*July 15, 2012 by niharika*

**Java**

I need to write a Java program using an input file with the below data. I don’t even know where to begin. I have written others but this one has me totally confused. I know how to do it using math WL% = Wins / (Wins + Losses) I also wrote this to use but, can’t figure out how ...
*April 5, 2008 by Jay*

**statistics**

Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. (0.1 point) Percentage of scores less...
*May 10, 2010 by Rose*

**percentage**

Evelyn has a ribbon 420cm long.She uses 216cm to decorate a present.what percentage of the ribbon is left?Express your answer correct to 1 decimal place
*February 11, 2012 by Da S*

**math**

Assume that the average annual salary for a worker in the United States is $30,500 and that the annual salaries for Americans are normally distributed with a standard deviation equal to $6,250. Find the following: (A) What percentage of Americans earn below $19,000? (B) What ...
*October 25, 2012 by Jen*

**Math**

Assume that the average annual salary for a worker in the United States is $30,500 and that the annual salaries for Americans are normally distributed with a standard deviation equal to $6,250. Find the following: (A) What percentage of Americans earn below $19,000? (B) What ...
*October 28, 2012 by Michael*

**Statistics**

The Graduate Record Examination (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. For each of the following problems: 1. Draw a rough sketch, darkening the ...
*September 22, 2014 by Jill*

**Simple math**

If Kristin buys gas at $2.69 per gallon, which includes all taxes, what percentage of the price is the state tax? What percentage is the federal tax The state tax is .8 and federal tax is .18. So would I multiply each by the total amount the gas cost?
*December 4, 2014 by Matthew*

**statistics**

The Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. What percentage score above 1300? What percentage score above 800? What percentage ...
*September 21, 2014 by Jeremy*

**accouting**

Nancy Company has budgeted sales of $300,000 with the following budgeted costs: Direct materials $60,000 Direct manufacturing labor 40,000 Factory overhead Variable 30,000 Fixed 50,000 Selling and administrative expenses Variable 20,000 Fixed 30,000 Question 1: Compute the ...
*April 2, 2011 by eric*

**statistics**

Given a distribution of scores with a mean of 26 and standard deviation of 6. assuming normality what percentage of the cases fall between 18 and 27, what percentage of the cases lie above score 18 and below 29
*April 16, 2010 by Anshika Srivastava*

**math**

need help please. the time required for one complete oscillation of a pendulum is called its period. if L is the length of the pendulum, then the period is given by P= 2 times pie multiplied by the square root of (L/g), where g is a constant called the acceleration due to ...
*December 2, 2014 by john*

**arithmetic**

In a box of 800 oranges,72 are bad.what percentage is bad?what percentage is good?
*June 17, 2014 by siyenna*

**ENGLISH/MATH HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!**

NYS ELA 7 Score - Level 2 (high two so I was seven points away to a three) My Scale Scare - 658 Level Two: 642-664 (scale score) Level Three: 665-697 (scale score) NYS Math 7 Score - Level 3 My Scale Score - 678 Level Three - 670-693 (scale score) I really want to know my ...
*March 23, 2013 by Laruen*

**Math problem**

Please help me solve I have a budget of 5000, Labor is 1,835.00 a month what's the precentage a month Material is 18% a month how much is material a month Rent and utilities 25% how much is rent a month Miscellaneous is 1,015 what is the percentage The percentage should total ...
*November 21, 2011 by Lavern*

**MATH/FINANCE**

If DOL is defined as DOL=Percentage change in OCF/Percentage Change in Q please derive equation: DOL=1+FC/OCF? I need this by tomorrow...please help.
*December 8, 2010 by Anonymous*

**math**

What percentage of the total students chose skateboarding? (1 point) 10% 20% 30% none of these if 2 bys and 1 girl chose skateboarding? What percentage of the boys chose walking? (1 point) 30% 45% 25% none of these
*March 27, 2013 by Terry*

**marketing**

she purchase a lamp for Rs. 900 and sell it for Rs. 1500, determine the following a)rupee markup, b)markup percentage on cost, c)markup percentage of selling price
*January 20, 2013 by rony*

**Check my answers?**

A. 75 % B. 12.5% C. 25% D. 3.13% E. 9.38% 3. what percentage of land on the earths surface is inhospital lands? - B 4. what percentage of earths surface is covered by land? - C 5. what percentage of land on earth is usable, for living on, but not for agriculture/farming?-D 6. ...
*November 15, 2013 by Selena *

**chemistry**

The percentage of C,H,O in vitamin C were determined by burning a sample weighing 2.00g. The masses of carbon dioxide and water formed are 3.00mg and 0.81mg respectively. Find the percentage of each element and the empirical fomula of vitamin C
*October 22, 2014 by Jude Patrick*

**business statistics**

The scores on a standardized exam are normally distributed with mean= 50 and variance=16. (a) what percentage of the scores exceed 58? (b) what percentage of the scores lie between 38 and 54? (c) what is the 84th percentile of the distribution?
*February 20, 2011 by Julie*

**Earth space science, check answers?**

A. 75 % B. 12.5% C. 25% D. 3.13% E. 9.38% 3. what percentage of land on the earths surface is inhospital lands? - B 4. what percentage of earths surface is covered by land? - C 5. what percentage of land on earth is usable, for living on, but not for agriculture/farming?-D 6. ...
*November 15, 2013 by Selena *

**math**

A. Mandy buy a sweater that is on sale for 20% less than the original price, and then she uses a coupon worth an additional 15% off of the sale price. What percentage of the original price has she saved ? B. If the price of a stock increases by 40% and then by an additional 25...
*January 27, 2013 by gary*

**!chemistry !experiment!**

Design an experiment which is not a tritation, you could use to calculate the percentage of water of crystalallization in NA2CO3.xH20. Need apparatus, detailed method including precutions and assumptions, how the results are recorded and how the percentage is calculated
*June 1, 2010 by Cameron*

**Math**

The percentage of a certain brand of computer chips that will fail after t years of use is estimated to be P(t) = 100(1 − e−0.12t ). What percentage of this brand of computer chips are expected to be usable after 3 years? (Round your answer to one decimal place.)
*April 5, 2014 by Vanessa*

**Math**

The percentage of a certain brand of computer chips that will fail after t years of use is estimated to be P(t) = 100(1 − e−0.12t ). What percentage of this brand of computer chips are expected to be usable after 3 years? (Round your answer to one decimal place.)
*April 6, 2014 by Vanessa*

**math**

The percentage of a certain brand of computer chips that will fail after t years of use is estimated to be P(t) = 100(1 − e−0.12t ). What percentage of this brand of computer chips are expected to be usable after 3 years? (Round your answer to one decimal place.)
*April 7, 2014 by vanessa*

**Math**

The percentage of a certain brand of computer chips that will fail after t years of use is estimated to be P(t) = 100(1 − e−0.12t ). What percentage of this brand of computer chips are expected to be usable after 3 years? (Round your answer to one decimal place.)
*April 7, 2014 by Vanessa*

**math**

two baseball players bat first and second in the lineup the first batter has on base percentage of 0.46 the second batter has an on base percentage of 0.31 if someone is on base but only 0.23 if the bases are empty at the start of the game what is the probability that both ...
*January 5, 2011 by w*

**math**

Assume that the average annual salary for a worker in the United States is $32,000 and that the annual salaries for Americans are normally distributed with a standard deviation equal to $7,000. Find the following: (A) What percentage of Americans earn below $24,000? (B) What ...
*July 19, 2012 by Rashonda*

**Math**

Can someone explain what to do for the following question. What percentage of a normal distribution is greater than the mean? Give your answer correct to the nearest percent. What formula is used? Because I have to find also 1 standard deviation of the mean and what percentage...
*May 22, 2013 by Sue*

**statistics**

using the 68- 95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard diviation of 20. Use the 68-95-99.7 rult to find the following quantities: percentage of scores less than 100 relative frequency of scores less than 120. ...
*August 19, 2010 by margaret*

**Algebra1**

Please check these 15. Simplify the product using FOIL: (4x+3)(2x+5) 6x^2 + 26x + 15 16. Given the set of data 2, 6, 3, 8, 5, 4, 2, what is the mean? 4.28 41. Find 60.5% of 8,125. 4,915.625 54. Find 45% of 125 56.25 68. Evaluate: (5.0 x 10^3) x (4.0 x 10^7) I need help in this...
*June 10, 2010 by y912f*

**application statistic**

assume that a set of test score is normally distrubuted with a meanof 100 and a standard deviation of 20 find the quantities using the 68-95-99.7 rule to get: the percentage of scores less than 100: B) relative frequency of scores less than 120 c) percentage ofless than 140, D...
*June 7, 2010 by Latoya*

**Statistics**

The Graduate Record Exam has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. A. What percentage of the persons who take the test score above 1300? b. What percentage ...
*November 23, 2014 by Charlene*

**Math**

Suppose that the number of bacteria in a certain population increases according to an exponential growth model. A sample of 2600 bacteria selected from this population reached the size of 2873 bacteria in two and a half hours. Find the continuous growth rate per hour. Write ...
*February 21, 2011 by Rachal*

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