Tuesday

November 24, 2015
Number of results: 51,907

**algebra**

a parking meter gives 30 minutes for each quarter and 6 minutes for each nickel. the equation 30x+6y=60 describes the number of quarters x and nickels y that you need to park for 60 minutes what does the x-intercept represent?
*December 12, 2012 by hannah*

**AP math 11 grade**

the charges for a phone call are $.52 for first min. and $.35 for each additional min. A)graph this step function for 6 minutes.Let x represent time, and f(x) the charge B) for the domain 0<x<=6, what is the range? C)is the relation formed by interchanging x and f(x) ...
*November 21, 2010 by sal*

**Math - Statistics**

Suppose that the mean number of customers who arrive at the check-out counters each minute is 4. Create a Poisson Distribution with u (lamda) = 4 for x = 0 to 20. Compare your results to the histogram. 20 random numbers are generated with a Poisson distribution for u (lamda...
*December 6, 2007 by J*

**Quick ?**

I doing a sample lesson plan for my english class. I want to show a movie that realtes to the book that were reading and the movie is 106 minutes. I teach each class for 50 minutes a day. How many days would it take to finish the movie and how long is 106 minutes?
*September 27, 2010 by Madison*

**arithmetic**

The minute hand on a clock is 49mm long. What area does it pass over in 30 minutes.
*October 23, 2014 by Vanetta*

**calculus**

Newtons law of cooling states that the rate of cooling of an object is proportional to the temperature difference between the object and its surroundings. So the rate of cooling for a bottle of lemonade at a room temperature of 75F which is placed into a refrigerator with ...
*July 16, 2015 by Anonymous*

**Algebra**

A long-distance call using DEC costs 20 cents for the first minute and 16 cents for each additional minute. The same call, placed on LCS, costs 19 cents for the first minute and 18 cents for each additional minute. For what length of phone calls is DEC less expensive? Here's ...
*January 24, 2009 by Gemma*

**math**

Part 1: Using the Library, web resources, and/or other materials, find a record-breaking temperature (in degrees Celsius) for a town or city in a country other than the United States. Include the name of the town and country along with the temperature, and what record was ...
*November 2, 2009 by Samantha*

**AIU**

Part 1: Using the Library, web resources, and/or other materials, find a record-breaking temperature (in degrees Celsius) for a town or city in a country other than the United States. Include the name of the town and country along with the temperature, and what record was ...
*January 3, 2010 by Feguens Mileon*

**Algebra**

which of following best define the two quantities that are measure to find the call rate phone company? A.the quantity of price measured in dollars depends on the quantity of time measured in minutes B. the quantity measured in minutes depends on the quantity of price measured...
*September 15, 2015 by Ariel*

**english**

I don't know if my experience would be considered good or bad, but it really taught me a lesson. A few years ago, I was working a bank, and they had a representive from a cell phone company come and talk to everyone about getting a cell phone. I did not have a cell phone at ...
*August 10, 2011 by Anonymous*

**math**

The scatter plot shows the study times and test scores for a number of students. How long did the person who scored 81 study? A. 50 minutes B. 81 minutes C. 16 minutes D. 100 minutes helppppppp!!!!!
*October 15, 2012 by jose*

**math**

Jim and Joe were running together. Jim's average speed was 400 meters per minute.Jim started running four minutes before Joe. ten minutes after Joe started, he caught up with Jim. What was Joe's average speed?
*November 29, 2011 by iris*

**statistics**

On average, 30-minute television sitcoms have 22 minutes of programming.If a probability distribution for minutes of programming can be approximated by a uniform distribution from 18 minutes to 26 minutes. What is the probability a sitcom will have 25 or more minutes of ...
*November 11, 2011 by Michelle*

**statistics**

On average, 30-minute television sitcoms have 22 minutes of programming.If a probability distribution for minutes of programming can be approximated by a uniform distribution from 18 minutes to 26 minutes. What is the probability a sitcom will have 25 or more minutes of ...
*November 11, 2011 by Michelle*

**statistics**

On average, 30-minute television sitcoms have 22 minutes of programming.If a probability distribution for minutes of programming can be approximated by a uniform distribution from 18 minutes to 26 minutes. What is the probability a sitcom will have 25 or more minutes of ...
*November 11, 2011 by Michelle*

**math**

1. Jina purchased a prepaid phone card for $15. Long distance calls cost 11 cents a minute using this card. Jina used her card only once to make a long distance call. If the remaining credit on her card is $11.04 , how many minutes did her call last? I got 3.96 minutes is that...
*October 1, 2009 by dan*

**math**

4. Jenny swam 50 meters in 25 seconds. Which rate below is equivalent to Jenny's rate? (1 point) 1,200 meters in 8 minutes, 20 seconds 200 meters in 2 minutes 400 meters in 3 minutes, 20 seconds 800 meters in 4 minutes
*March 10, 2013 by Bally*

**Stats**

The Internal Revenue Service (IRS) provides a toll-free help line for taxpayers to call in and get answers to questions as they prepare their tax returns. In recent years, the IRS has been inundated with taxpayer calls and has redesigned its phone service as well as posted ...
*December 7, 2014 by Avery*

**Math**

One calling plan offers long distance calls for .03 per minute. Another plan costs $2.00 per month but offers long distance service for 0.01 per minute. Write and solve an equation to find the number of long distance minuets for which the two plans would cost the same.
*November 6, 2012 by Bryan*

**math**

Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do the same job in 45 minutes. Tony can do the same job in 1.5 hours. How quickly can all three fill the pool together? A.12 minutes B.15 minutes C.21 minutes D.23 minutes E.28 minutes I got 53 minutes, but ...
*July 28, 2014 by Johnny *

**math question **

Don't know how to do this problem. Drew lifts weights for 15 minutes a day and run on the treadmill for 30 minute. Use the distributive property to find the minutes the total minutes that drew exercises for 7 days
*February 21, 2012 by Khalief *

**Math--4 practice questions?**

1. t + 27 = 21 t = 6 t = 47 t = 6 t = 47 2. 24 = m 32 m = 8 m = 56 m = 768 m = 56 3. Tamara has eaten 1,400 calories for breakfast and lunch. She has 800 more calories, c, that she can eat for dinner. Write and solve an equation to find Tamaras daily caloric intake. 1,...
*October 2, 2014 by anonymous*

**math**

a) The sales representative here tells you they also have two floor plans available, but they only have 54 homes available. Write an equation that illustrates the situation. Use x and y to denote floor plan #1 and floor plan #2 respectively. X+Y=54 or Y=(54-x)with the ...
*May 16, 2011 by sarah*

**math**

Mike can run the mile in 6 minutes, and Dan Can run the mile in 9 minutes. If mike gives Dan a head start of 1 minute, how far from the start will mike pass Dan? How long does it take?
*September 17, 2008 by kelli*

**Math**

Q. Sidney flew in an airplane five times during her vacation. The flights overaged 2 hours 28 minutes long. The lengths of her first four flights were 2 hours 10 minutes,3 hours 20 minutes,1 hour 15 minutes,and 2 hours 40 minutes. What was the length of her last flight. A. Do ...
*January 12, 2015 by Destinee*

**accounting**

initial investment in the company of $26,200 cash. Here are the assets and liabilities for the month of June, its first month of operation. Cash $4,600.00 Accounts receivable $4,000.00 Revenue $7,000.00 Supplies $2,400.00 Advertising expense $400.00 Equipment $29,000.00 Notes ...
*September 3, 2010 by Anonymous*

**ALGEBRA**

A telephone company has a choice of two plans. Plan A - $30 per month and $.05 per phone call and Plan B - $20 per month and $.10 per phone call. Which is the best plan for you? I need to form two equations with the above, please help
*April 22, 2012 by ODSSEY*

**Math**

1. t + 27 = 21 t = 6 t = 47 t = 6 t = 47 2. 24 = m 32 m = 8 m = 56 m = 768 m = 56 3. Tamara has eaten 1,400 calories for breakfast and lunch. She has 800 more calories, c, that she can eat for dinner. Write and solve an equation to find Tamaras daily caloric intake. 1,...
*October 2, 2014 by Anonymous*

**Math(Equation Writing)**

Can you please help me write out the equation for these? (not solve) 1. The number of trees planted by the Alpine Nursery in April was three more than twice the number of trees planted by the nursery in March. If 73 trees were planted in April, how many trees did the nursery ...
*August 24, 2011 by Bryce*

**Pre-Calc/Trigonometry**

You place a cup of 205oF coffee on a table in a room that is 72oF, and 10 minutes later, it is 195oF. Approximately how long will it be before the coffee is 180oF? Use Newton's law of cooling: 1 hour 25 minutes 15 minutes 45 minutes
*December 30, 2014 by Anonymous*

**algebra (inequalities)**

your club is in charge of making pins that students can buy to show their school spirit for the upcoming football game. you have made 225 pins so far, and you only have 120 minutes left to make the rest of the pins. you need to make at least 400 pins. a. write an inequality ...
*January 9, 2011 by Bri*

**Math**

The mean time to complete a certain stat quiz is 25 minutes, with a standard deviation of 5 minutes. Find the probability of a student taking. 1.) less than 15 minutes. 2.) Between 15 and 25 minutes. 3.)more than 25 minutes.
*April 14, 2013 by John*

**programming**

A local recording studion rents its facilities for $200 per hour. Management charges only for the number of minutes used. Create a project in which the input is the name of the group and the number of minutes it used the studio. Your program calculates the appropriate charges...
*September 22, 2014 by Kesha*

**Math**

a long distance phone company charges $3 for a phone call plus $0.75 for each minute of the call. What fuction does this situation give rise to? Find the formula and make a table for this function.
*November 17, 2010 by lt*

**algebra**

the first of two films lasted 9 minutes less than twice as long as the second. the combined length of the two films plus a 5-minute break between them was 260 minutes. how long was the first film?
*August 16, 2012 by nickky*

**math**

don't know where to start or end! charges $20 for a phone and $30/month for its economy plan. The equation C =30t + 20 describes the total cost, C of operating a media service phone for t months. The total cost for 10 months of service is $_______.? If a customer has only 80 ...
*September 27, 2010 by jean*

**Math**

A international phone call cost a fixed amount for the first minute and a certain rate per each additional minute. If a 7 minute phone call cost $10 and a $4 call cost &6.40, find the fixed charge and the rate per each additional minute.
*October 21, 2012 by Jamese*

**Math**

Natalie performs a chemistry experiment where she records the temperature of an ongoing reaction. The solution is 93.5 C after 3 minutes; 90 C after 5 minutes, 84.8 C after 9 minutes; 70.2 C after 18 minute; 54.4 C after 30 minutes; 42.5C after 37 minutes; and 24.9 C ...
*May 1, 2013 by Brittany*

**algebra 1**

Natalie performs a chemistry experiment where she records the temperature of an ongoing reaction. The solution is 93.5 C after 3 minutes; 90 C after 5 minutes, 84.8 C after 9 minutes; 70.2 C after 18 minute; 54.4 C after 30 minutes; 42.5C after 37 minutes; and 24.9 C ...
*May 1, 2013 by Brittany*

**calculus**

an airplane flying due east at 400 km/h pasess over an airport 12 minutes before a second plane flying south 30 degrees west at 500 km/h.if the airplanes are at the same altitude how fast will they by seprating when the seccong pane is over the airport.?When will they be the ...
*March 17, 2011 by tara*

**math**

A phone compant uses the expression 1.25 + 0.10m to calculate the cost of a phone call that lasts m minutes. What is the cost of a call that last 20 minutes?
*March 7, 2011 by Jay*

**Math **

Jim starts with a $2000 balance on his credit card. During the first month he charges $300, and during the second month he charges $500. The credit card has finance charges of 23% APR. The first month Jim makes a $200 payment and the second month Jim makes a $400 payment. What...
*November 5, 2015 by Caitlyn *

**Math**

The attendance at a baseball game was 400 people. Student Ticket cost $2 and adult tickets cost were $3. Total Ticket Sales were $1050. How many tickets of each type were sold? Ok, this is what I did: 2x+400=1050 -400=-400 ----------- 2x=650 x=325 3y+400=1050 -400=-400...
*September 22, 2007 by Robert*

**math 120**

A recent poll of a random sample of 400 students at a public 4-year college showed the average (mean) amount of time spent using email was 49 minutes per day with a standard deviation of 44 minutes. a. find a 95% confidence interval fot the population mean
*December 11, 2014 by Anonymous*

**Math**

Open Ended Nick is starting college in the fall. She has purchased a Star Phone card for $30.00for long didtance calls. The calls cost 10 cents per minute nation wide during the daytime, 6 a.m - 6 p.m and 5 cents per minute nationwide at night, 6 p.m-6a.m. Every day Nick ...
*March 3, 2008 by Mack*

** Calculusss ( pleassee someboddy heelp )**

an airplane flying due east at 400 km/h pasess over an airport 12 minutes before a second plane flying south 30 degrees west at 500 km/h.if the airplanes are at the same altitude how fast will they by seprating when the seccong plane is over the airport.?When will they be the...
*March 18, 2011 by Alisha*

**Math**

Beth got a job painting dorm rooms at her college. At top speed, she could paint 5 identical rooms during one 6-hour shift. How long did she take to paint each room? A. 50 minutes B. 1 hour and 10 minutes C. 1 hour and 12 minutes D. 1 hour and 15 minutes E. 1 hour and 20 minutes
*February 3, 2014 by Anonymous*

**Math**

Bill can mow his mothers lawn in 6 minutes. His brother Jim can mow it in 9 minutes. How long will it take them to do it together, if each has his own lawnmower? (record answer in minutes rounded to one decimal place. For example 14.2835 minutes, record 14.3).
*August 27, 2009 by tiffany*

**MATH I WANT TO PLAY**

HOW MANY HOURS ARE IN 5.400 MINUTES
*March 18, 2011 by Americal*

**statistics**

Waiting times at a doctor office are normally distributed with a mean of 35 minutes, and a standard deviation of 10 minutes. What is the chance a patient would have to wait over 50 minutes?
*November 5, 2014 by Cecy*

**algebra**

A car travels at a constant rate of 45 mph on a highway iffinitely (assume it never has to stop for gas) How far has the car traveled after x minutes? 45 miles/hr * (1/60 hr/minute) * x minutes = 3/4 x miles (if x is in minutes)
*June 26, 2007 by Anonymous*

**math**

on the fastest speedways, some drivers reach average speeds of 2 miles per minute. write the formula that gives the number of miles M that such driver would travel in x minutes. How would this driver travel in 37 minutes
*April 11, 2011 by Joe*

**math**

On the fastest speedways some drivers reach average speeds of 4 miles per minute. Write a formula that gives the number of miles m that such a driver would travel in x minutes. How far would this driver travel in 36 minutes?
*February 17, 2011 by Anonymous*

**chemistry**

A slab of plate glass containing dissolved helium is placed in a vacuum furnace at a temperature of 400 C to remove the helium from the glass. The concentration of helium is constant throughout the glass before vacuum heat treatment. After 10 minutes in vacuum at 400 C, at ...
*December 21, 2013 by Dick*

**math**

Frank's cell phone package costs $20 per month and an additional $0.05 per text. Josie pays $15 per month and $0.10 per minute. Determine the linear system that could be used to find out when their monthly bills would be the same.
*July 28, 2012 by David*

**algebra**

Which of the following is the most appropriate unit to describe the time you can drive a car based on the amount of gas? Minutes per gallon, because the independent quantity is the gallons Minutes per gallon, because the independent quantity is the minutes Gallons per minute, ...
*September 3, 2015 by oscar*

**math**

Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do the same job in 45 minutes. Tony can do the same job in 1 hours. How quickly can all three fill the pool together? A. 12 minutes B. 15 minutes C. 21 minutes D. 23 minutes E. 28 minutes
*March 19, 2009 by sharon*

**Math**

My daughter's homework and I cant figure it out for the life of me. In America the average person spends about 9.5 billion minutes on the phone a business day. In 1997 the estimated population of Americans the ages of 19-64 is about 163,000,000. About how many minutes does the...
*September 27, 2006 by SherylA*

**Algebra 2**

"your long distance service provider charges you $.06 PER minute plus a monthly access fee of 4.95 for referring a friend,you receive $10 service credit this month.if your long-distance bill is 7.85,how many long-distance minute did you use"
*August 28, 2013 by junior*

**math**

On Friday morning two clocks are correctly set at 6 a.m. One clock gains 1 minute every 2 hours. The other clock loses 1 minute every hour. When the real time is 10 p.m. that evening, the fast clock is ______ minutes ahead of the slow clock. Please explain the answer Thanks I ...
*January 5, 2014 by nisrin*

**Chemistry**

I've tried this problem over and over again, but im not getting the right answers! This is the problem....... Dinitrogen pentoxide, N2O5, decomposes when heated in carbon tetrachloride solvent. N2O5 2 NO2 + 1/2 O2(g) If the rate constant for the decomposition of N2O5 is 6.2...
*November 10, 2009 by Dena*

**stat**

An oil change company advertises that they can change the oil in your car in 15 minutes. Based on the data collected below, what is the probability that oil change will take more than 15 minutes? Class Interval Frequency 6 to 10 minutes 3 11 to 15 minutes 8 16 to 20 minutes 6 ...
*August 26, 2013 by latasha*

**statistics**

the scheduled commuting time on Long Island Rail Road from Glen Cove to New York is 65 minutes. Suppose that the actual commuting time is uniformly distributed between 64 and 74 minutes. What is the probability that the commuting time will be a) less than 70 minutes B) between...
*January 11, 2011 by ann*

**5th grade Math**

One tap can fill a barrel in 3 minutes and another can fill it in 6 minutes. Both taps are turned on together for 1 minute. What fravction of the barrel will be filled in 1 minute?
*April 26, 2009 by Serena*

**algebra**

media service charges $20 for a phone and $30/month for its economy plan. The equation C =30t + 20 decribes the total cost, C of operating a media service phone for t months. The total cost for two months of srvice is $_______.? If a customer has oly 90 avilable, how many ...
*July 6, 2010 by Jim*

**math**

Diane plans to drive 30 miles to her interview. If she averages 25 miles per hour, how long will it take her to get there? Answers: (A) 50 minutes (B) 55 minutes (C) 1 hour and 12 minutes (D) 1 hour and 20 minutes
*May 7, 2014 by Lakota*

**math**

two phone companies offer discount rates to students. the first company wants $9.95 per month plus $.10 per minute for long distance calls. The second company wants $12.95 per month plus $.08 per minute for long distance calls. What is the equation?
*September 21, 2014 by susie*

**algebra 1**

*I have asked countless people to help me with this story problem and nobody seems to know how to do it! Please help! Natalie performs a chemistry experiment where she records the temperature of an ongoing reaction. The solution is 93.5 C after 3 minutes; 90 C after 5 ...
*May 2, 2013 by Brittany*

**math**

Andrew worked from 9:45 am to 3:40 pm on Saturday.how long did he work on Saturday? A)5 hours 50 minutes B)5 hours 55 minutes C)6 hours 5 minutes D)6 hours 55 minutes i got 6 hours 35 minutes what did i do wrong
*March 25, 2010 by george*

**Math**

An airplane has a speed of 400 km/h with no wind. The airplane flies 2140 km with the wind. The airplane can only fly 1860 km against the wind in the same time. If w equals the speed of the wind, which equation would be used to find w? a) 2140/(w+400) = 1860/(w-400) b. 2140/(...
*January 10, 2012 by Jayson*

**Math**

do you borrow his bike for a total of 41 minutes.before lunch,he vote for one minute less than five times the number of minutes he rolled after lunch. how many minutes did you fire ride before lunch
*November 12, 2014 by Greg *

**Algebra**

A cellular offers a contract for which the cost C, in dollars, of t minutes of telephoning is given by C=0.25 (t-600) + 41.95, where it is assumed that t 600 minutes. What times will keep costs between $79.95 and $117.20?
*April 3, 2010 by Michael*

**algebra**

Two phone companies offer discount rates to students. The first company wants $9.95 per month plus $.10 per minute for long distance calls. The second company wants $12.95 per month plus $.08 per minute for long distance calls.
*January 21, 2014 by mu*

**Algebra**

You are choosing between two long distance telephone plans. One plan has a monthly fee of $15 with a charge of $.05 per minute. The other plans has a monthly fee of $5 with a charge of $.07 per minute. For how many minutes of long-distance calls with the cost for the two plans...
*February 2, 2012 by lolo*

**math**

The first of two films lasted 9 minutes less than twice as long as the second. The combined length of the two films plus a 5-minute break between them was 260 minutes. How lon was the film I dont know how to set it up the words confuse me Help?
*October 26, 2012 by Yonatan*

**Mathematics**

Anna burned 15 calories per minute running for x minutes and 10 calories per minute hiking for y minutes. She spent a total of 60 minutes running and hiking and burned 700 calories. The system of equations shown below can be used to determine how much time Anna spent on each ...
*September 24, 2013 by Joy*

**Algebra**

Leila purchased a prepaid phone card for . Long distance calls cost cents a minute using this card. Leila used her card only once to make a long distance call. If the remaining credit on her card is , how many minutes did her call last?
*July 8, 2013 by Ron*

**algrebra**

Christine purchased a prepaid phone card for . Long distance calls cost cents a minute using this card. Christine used her card only once to make a long distance call. If the remaining credit on her card is , how many minutes did her call last?
*May 12, 2014 by terri*

**Statistics**

If we know that the length of time it takes a college student to find a parking spot in the library parking lot follows a normal distribution with a mean of 3.5 minutes and a standard deviation of 1 minute, find the point in the distribution in which 75.8% of the college ...
*March 19, 2010 by Pacifico*

**stats**

An automobile repair shop has determined that the average service time on an automobile is 2 hours with a standard deviation of 32 minutes. A random sample of 64 out of 400 services is selected. What is the probability that this sample will have a mean service time greater ...
*November 11, 2009 by sandy*

**math**

Bill can mow his mother's lawn in 45 minutes. His brother Jim can mow it in 65 minutes. How long will it take them to do it together, if each has his own lawnmower? (Record your answer in minutes rounded to one decimal place. For example, if the answer you find is 14.2835 ...
*September 9, 2015 by sam*

**calculus**

If 25000 people board a ship at a rate of 400 per hour for 10 hours a 37 minutes a day. How long will it take for them to all board the ship?
*January 31, 2012 by Anonymous*

**calculus**

If 25000 people board a ship at a rate of 400 per hour for 10 hours a 37 minutes a day. How long will it take for them to all board the ship?
*January 31, 2012 by Anonymous*

**calculus**

If 25000 people board a ship at a rate of 400 per hour for 10 hours a 37 minutes a day. How long will it take for them to all board the ship?
*January 31, 2012 by Anonymous*

**calculus**

If 25000 people board a ship at a rate of 400 per hour for 10 hours a 37 minutes a day. How long will it take for them to all board the ship?
*January 31, 2012 by Anonymous*

**math**

The temperature in a room is changing at a steady rate. If x is the number of minutes since noon, the temperature was -4 C when x = -3 minutes and the temperature was 6 C when x = -5 minutes. Find the rate of change in temperature in degrees per minute. The answer is -5. How...
*February 5, 2015 by HAAAAAAAAY*

**health**

4. What is the ideal length of time for a cool-down following an intense workout? A. 15 to 20 minutes B. 5 to 15 minutes C. 0 to 3 minutes D. 3 to 5 minutes i think its b?
*November 20, 2011 by Anonymous*

**ENGLISH!!**

After a few __________ hesitation, he agreed that __________ not worth the risk. minute's its' minutes' its minutes' it's minute's it's There is no such word as its', so the first pair is out. it's means "it is" or "it has" its is used when "it" owns/possesses the noun ...
*October 16, 2006 by Kourtney*

**pre algebra**

Two bank robbers flee at 60 mph. 26 minutes later, a police helicopter follows at 120mph. How long til they catch them? I figured 39 minutes. I takes the police 13 minutes to get to the 26 mile mark. Then the robbers move 13 miles forward. then the police take 6.5 minutes to ...
*December 15, 2014 by Phoebe*

**physics**

A woman pushes a refrigerator across the floor at a steady speed of 20cm/s . If she has to push with a horizontal force of 400 N to keep it moving , is the force of friction less than 400 N , 400 N, more than 400 N, why
*March 25, 2012 by Melissa*

**Stitistics**

An oil change company advertises that they can change the oil in your car in 15 minutes. Based on the data collected below, what is the probability that oil change will take more than 15 minutes? Using this example as a template, post a similar example from your experience. ...
*July 9, 2013 by Sandi*

**stat**

The average commute time via train from the Chicago O'Hare Airport to downtown is 60 minutes with a standard deviation of 15 minutes. Assume that the commute times are normally distributed. What proportion of commutes would be: longer than 80 minutes? less than 50 minutes? ...
*October 14, 2011 by des*

**Q Research**

2. The average commute time via train from the Chicago O'Hare Airport to downtown is 60 minutes with a standard deviation of 15 minutes. Assume that the commute times are normally distributed. What proportion of commutes would be: a. longer than 80 minutes? b. less than 50 ...
*December 9, 2012 by Maurice*

**exponential equations**

6. Staphylococcus bacteria has a doubling time, d ,of 18 minutes. Calculate how long, t, it will take for the population to increase, from an initial population of 400 organisms, to 6400 organisms.
*March 29, 2015 by Anonymous*

**algebra**

Mike can assemble a computer table in 40 minutes and I can do it in 60 minutes. If Mike works for 20 minutes before I join him, how long will it take us to finish?
*May 24, 2010 by TinaG*

**mathematics **

One hydrant can fill a truck in 12 minutes, another in 6 minutes . If they are both turned on together how long would the truck take to be filled? 12+6= 18\2= 9 minutes
*July 23, 2014 by Maggie *

**heart and lungs/cardiorespiratory fitness**

what is the ideal length of time for a cool-down following an intense workout a.0 to 3 minutes b.15 to 20 minutes c.3 to 5 minutes d.5 to 15 minutes my answer is d
*February 5, 2014 by susue*

**math**

What is the figure that gives the half-life of the isotope in minutes to 4 significant figures? Exponential regression on a set of data, which gives the amount of atoms of a radioactive isotope remaining after a time X minutes, produced the following output. ExpReg y = a*b^x a...
*May 18, 2007 by claudia*

**statistics**

A cell phone service provider has selected a random sample of 20 of its customers in an effort to estimate the mean number of minutes used per day. The results of the sample included a sample mean of 34.5 minutes and a sample standard deviation equal to 11.5 minutes. Based on ...
*February 22, 2015 by timothy kendricks*