Monday

December 5, 2016
Number of results: 61,740

**physics**

Use the fact that the speed of light in a vacuum is about 3.00 108 m/s to determine how many kilometers a pulse from a laser beam travels in exactly 4.9 hour(s)

*August 23, 2011 by Anonymous*

**MATH**

Kevin earns $15 per hour for working 8 hours. Then he earns $18 per hour for working overtime for 4 hours during a day. What is the average amount that Kevin earns per hour during a day?

*November 21, 2015 by lexi*

**Math**

Makena drives 3 hours at an average speed of 45 miles per hours. Then she drives 5 hours at an average speed of 55 miles per hour. what is her average speed for the whole trip?

*December 5, 2015 by Harish*

**math**

Cheryl is training for a long bicycle ride. Jim will drive Cheryl back and her bicycle 60 miles from town, drop them off, and then drive back to town. Cheryl then will ride her bicycle back to town. On the way back to town, Jim will travel at 50 miles per hour and Cheryl will ...

*February 1, 2012 by Melanie*

**Algebra**

A boat can travel upstream 14 miles in same it can travel downstream 8 miles. the boat is traveling 13 miles per hour. what is the current

*June 1, 2008 by Kim*

**physics**

abe left his house at 10:14 and goes north 14.0 kilometers to school then and south 70.6 kilometers to the candy store,arriving at 10:57.what are his displacement,total distance,average velocity?

*September 25, 2011 by sana*

**pre-calc**

Alice walks on a straight line at four miles per hour. Two hours after she begins walking, Bob runs after her at a rate of six miles per hour. How fast (in miles per hour) is Bob gaining on Alice?

*October 10, 2016 by Math*

**pre-calc**

Alice walks on a straight line at four miles per hour. Two hours after she begins walking, Bob runs after her at a rate of six miles per hour. How fast (in miles per hour) is Bob gaining on Alice?

*October 10, 2016 by Math*

**Pre-calc**

Alice walks on a straight line at four miles per hour. Two hours after she begins walking, Bob runs after her at a rate of six miles per hour. How fast (in miles per hour) is Bob gaining on Alice?

*October 11, 2016 by Math*

**Algebra 1 (Reiny)**

How am I supposed to solve and graph this? "Linda works at a pharmacy for $15 an hour. She also babysits for $10 an hour. Linda needs to earn at least $90 per week, but she does not want to work more than 20 hours per week. Show and describe the number of hours Linda could ...

*January 16, 2014 by Anonymous*

**math .**

Rufus works an average of 46 hours each week. He gets paid $5.70 per hour and time-and-a-half for all hours over 40 hours. What is his annual income?

*January 4, 2010 by sabina*

**physics**

The Earth has a radius of about 6.38 ´ 103 kilometers at the equator and rotates 360° every 24 hours. The angular displacement of a person standing at the equator for 8.0 hours is:

*April 7, 2013 by carmen*

**math**

Many of the immigrants settled on farm land and they had to drive to town for supplies. One farmer drives to town at 36 miles per hour and returns at 48 miles per hour. If his total driving time is 3 ½ hours, how far is his farm from town?

*November 21, 2011 by tiffany mccormick*

**math**

Many of the immigrants settled on farm land and they had to drive to town for supplies. One farmer drives to town at 36 miles per hour and returns at 48 miles per hour. If his total driving time is 3 ½ hours, how far is his farm from town?

*November 21, 2011 by tiffany mccormick*

**algebra 1**

juan drives to work. Because of traffic conditions, he averages 22 miles per hour. He returns home averaging about 32 miles per hour. the toatle time traveled is 2 and 1/4 hours.define a variable for the time Juan takes to drive to travel to work write an expression for the ...

*March 26, 2008 by nathan*

**MATH**

1. A factory manufactures two products, each requiring the use of three machines. The first machine can be used at most 60 hours; the second machine at most 30 hours; and the third machine at most 80 hours. The first product requires 2 hours on machine 1, 1 hour on machine 2, ...

*May 12, 2014 by ANGELLA*

**Math/algebra**

Sandy drives the first 3 hours of her trip at 65 miles per hour. The last hour of the trip she drives 62 miles per hour. How far did Sandy drive on her trip?

*November 16, 2016 by Lauren *

**MATH 112**

two planes leave an airport at the same time. Their speeds are 320 miles per hour and 380 miles per hour. If the angle between their courses is 112 degrees, how far apart are they after two hours? (The hint is using the law of cosines)

*November 20, 2012 by diego sanchez*

**statistics**

A survey was conducted to measure the number of hours per week adults spend on home computers. In the survey, the number of hours was normally distributed, with a mean of 8 hours and a standard deviation of 1 hour. A survey participant is randomly selected. Find the ...

*November 7, 2011 by lindsay*

**Algebra**

1. What is the slope of the line that passes through the points (-2, 5) and (1, 4)? A. -3 B. -2 C. -1/3 D. 1/3 2. A line has a slope -5/3. Through which two points could this line pass? A. (12, 13) and (17, 10) B. (16, 15) and (13, 10) C. (0, 7) and (3, 10) D. (11, 13) and (8...

*November 29, 2015 by Danielle*

**Algebra!!**

1. What is the slope of the line that passes through the points (-2, 5) and (1, 4)? A. -3 B. -2 C. -1/3 D. 1/3 2. A line has a slope -5/3. Through which two points could this line pass? A. (12, 13) and (17, 10) B. (16, 15) and (13, 10) C. (0, 7) and (3, 10) D. (11, 13) and (8...

*November 30, 2015 by Danielle*

**Algebra**

1. What is the slope of the line that passes through the points (-2, 5) and (1, 4)? A. -3 B. -2 C. -1/3 *** D. 1/3 2. A line has a slope -5/3. Through which two points could this line pass? A. (12, 13) and (17, 10) B. (16, 15) and (13, 10) *** C. (0, 7) and (3, 10) D. (11, 13...

*December 3, 2015 by Help! :)*

**Math**

What is 9 kilometers per hour converted into feet per minute? A. about 1.77 feet per minute B. about 45.7 feet per minute C. about 492 feet per minute D. about 29,520 feet per minute

*January 30, 2013 by sara m. baker*

**physics**

Heather and Matthew walk eastward with a speed of 0.76 meters per second east. If it takes them 50 minutes to walk to the store, how far have they walked? Answer in kilometers

*September 30, 2013 by Christian *

**math**

A bus travel an interstate highway at an average speed of 85 km/hours. how far does it takes to travel in 20 mins?

*January 25, 2016 by Anonymous*

**MATH PLEASE im begging HELP!!!!!**

What is 900 feet per day converted into yards per hour? A. 12.5 yards per hour B. 37.5 yards per hour C. 112.5 yards per hour D. 7200 yards per hour

*January 30, 2013 by Wild*

**maths**

Two cyclists start biking from a trail's start 3 hours apart. The second cyclist travels at 10 miles per hour and starts 3 hours after the first cyclist who is traveling at 6 miles per hour. How much time will pass before the second cyclist catches up with the first from the ...

*February 20, 2010 by thommini*

**Trigonmetry**

If an airplane is traveling at 750 mph bearing of S 65 W for 3 hours how far will the plane travel? And what bearing should they travel home?

*April 28, 2011 by Mack*

**consumer math**

Rufus works an average of 46 hours each week. He gets paid $5.70 per hour and time-and-a-half for all hours over 40 hours. What is his annual income?

*February 5, 2010 by AR*

**help math!!!**

A boat travels down the river in 2.3 hours. The return trip up river takes 3.7 hours. A one way trip down or up river is a distance of 26 miles. If the boat is traveling at maximum speed, what is the boats speed measured in waters with no current? You need to use systems to ...

*December 13, 2012 by erin*

**help math**

A boat travels down the river in 3.0 hours. The return trip up river takes 3.6 hours. A one way trip down or up river is a distance of 23 miles. If the boat is traveling at maximum speed, what is the boats speed measured in waters with no current? You need to use systems to ...

*December 17, 2012 by erin*

**math help!!**

A boat travels down the river in 2.9 hours. The return trip up river takes 3.6 hours. A one way trip down or up river is a distance of 30 miles. If the boat is traveling at maximum speed, what is the boats speed measured in waters with no current? You need to use systems to ...

*February 22, 2013 by lilly*

**math problem**

a worker submits the following data on a timesheet: week 1: total hours: 42 (including 4 hrs sick leave, 6 hrs travel) Week 2: total hours: 46 hours (including 5 hours travel) what percentage of the recorded time did the worker spemnd traveling?

*May 18, 2009 by bev*

**chemistry**

An alien rocketship is traveling at a speed of 4,900,000 4{,}900{,}000 inches per hour. At this speed, how many miles will it travel in 1 minute? Round to the nearest thousandth.

*September 5, 2012 by britney*

**davidson high**

a consultant traveled 7 hours to attend a meeting. The return trip took only 6 hours because the speed was 10 miles per hour faster. What was the consultant's speed each way?

*September 25, 2007 by lisa*

**Algebra**

If a plane can travel 500 miles per hour with the wind 400 miles per hour against the wind, find the speed of the plane without a wind and the speed of the wind? What is the speed of the plane in still air?

*March 24, 2012 by rangel*

**algebra**

The cost, c(x) in dollars in per hour of running a certain fishing boat is modeled by the function c(x)= 0.9x^2 - 18.1x + 135.1, where x is the speed in km/hour/ At what approximate speed should the boat travel to achieve minimum cost?

*September 25, 2014 by Sarah*

**math**

A woman drove to work at an average speed of 40 miles per hour and returned along the same route at 30 miles per hour. If her total traveling time was 1 hour, what was the total number of miles in the round trip?

*March 19, 2008 by Lisa*

**algebra**

168 kilometers in 3.25 hours. how long to go 240 km?

*January 19, 2012 by christina olson *

**Trig**

Nathan and Julia are walking along lines that form a 38 degree angle. If Nathan walks at 3.6 miles per hour and Julia walks at 4.1 miles per hour, how far apart will they be after 2 hours?

*May 10, 2010 by MEGGG!!!*

**accounting**

Plumley Ad Agency contracted with a company to prepare an ad campaign. Plumley uses a job order costing system. Plumley estimates that the job will take 145 designer hours at $90 per hour and 85 staff hours at $45 per hour. Plumley uses two overhead rates in applying overhead ...

*December 10, 2011 by Anonymous*

**math**

mr.Thomas drove for two days.The first day he drove for 6 hours at an average speed of 55miles per hour. The next day he drove for 7 hours at an average speed of 63 miles per hour. How many miles did Mr.thomas drive during the two days?

*March 7, 2011 by Bluestarr*

**trigonometry**

A motor boat moves in the direction N32degreeW for 3hrs. at 18miles per hour. How far north and how far west does it travel?

*October 28, 2014 by Aki*

**physic**

Average Speed 1. In the 2008 Summer Olympics, Usain Bolt won the 100-m race in 9.69 s. What was his average speed? 2. Light from the sun reaches Earth in 8.3 min. The speed of light is 3.0108 m/s. How far is Earth from the sun? 3. In Major League Baseball, the distance between...

*November 3, 2011 by ray*

**computer science**

I need help with my Java homework! Write a program that calculates a customer's monthly bill. It should ask the user to enter the letter of the package the customer has purchased (A, B, or C) and the number of hours that were used. It should then display the charges. Modify ...

*February 15, 2010 by Matt*

**math**

After flying at an altitude of 9 kilometers, an airplane starts to descend when its ground distance from the landing field is 175 kilometers. To the nearest degree what is the angle of depression for this portion of the flight?

*May 28, 2014 by Anonymous*

**Math**

Tericho earns $8.80 per hour working at an ice cream shop. Janelle's earning at a drugstore follow the pattern in the table. Number of hours:3= $25.50, 7=$59.50, 12=$102 and 20=$170. Who makes more money per hour? By how much? . Thanks.

*March 25, 2016 by Griselda*

**Gramar**

a 4 hour tour averaged 3 miles per hour. if the average rate was 2.5 miles per hour for the first 3 hours what was the average rate for the last hour

*March 15, 2013 by Luisa*

**Math**

Last week Frank worked as a waiter for 6&1/4 hrs, earning $9.80 per hour. He also earned $14.50 per hour delivering packages for 7&1/2 hours. How much money did he earn last week?

*May 31, 2012 by Miranda*

**Math**

Last week Frank worked as a waiter for 6&1/4 hrs, earning $9.80 per hour. He also earned $14.50 per hour delivering packages for 7&1/2 hours. How much money did he earn last week?

*May 31, 2012 by Sammyjoo*

**algebra**

A consultant traveled 7 hours to attend a meeting. The return trip took only 6 hours because the speed was 10 miles per hour faster. What was the consultant's speed each way? I am trying to use the formula d=r*t how can i get the speed with out the distance Let r be his speed ...

*March 30, 2007 by Ray*

**Ratios and Rates**

Please help me with the following problems: 3. Express each ratio as a fraction in simplest form. 3 cups to 8 cups A. 3/16 B. 3/4 C. 3/8 D. 8/3 For this one, I think it is C. Is this correct? 6. Express each ratio as a unit rate. Round to the nearest tenth, if necessary. 100 ...

*August 24, 2014 by Brady*

**Math**

Hi i'm having trouble with a question. it states During the Summer you take 2 part time jobs. The first job pays $5 per hour. The 2nd Job pays $8 per hour. You want to earn at least $150 a week and work 25 hours or less a week. Write a system of inequalities that model the ...

*March 27, 2013 by Alex*

**math**

This is an SAT prep question. A woman drove to work at an average speed of 40 miles per hour and returned along the same route at 30 miles per hour. If her total traveling time was 1 hour, what was the total number of miles in the round trip?

*October 26, 2008 by Stella*

**algebra**

A relay team is going to participate in a 150-mile bicycle race. One rider averages 12 miles per hour. The second averages 16 miles per hour. Write a function modeling their trip, where x = the hours ridden by the first bicyclist and y = the hours ridden by the second bicyclist.

*May 14, 2015 by garry*

**Math**

A cyclist is traveling at a speed of 14 miles per hour. How long did it take the cyclist to travel 112 miles?

*April 2, 2016 by Lily*

**statistics**

A random sample of 16 mid-sized cars tested for fuel consumption gave a mean of 26.4 kilometers per liter with a standard deviation of 2.3. (a) Assuming that the kilometers per liter given by all mid-sized cars have a normal distribution, find a 99% confidence interval for the...

*October 25, 2014 by Angee*

**math**

A random sample of 16 mid-sized cars tested for fuel consumption gave a mean of 26.4 kilometers per liter with a standard deviation of 2.3. (a) Assuming that the kilometers per liter given by all mid-sized cars have a normal distribution, find a 99% confidence interval for the...

*April 26, 2016 by Kapaki Katea*

**Math**

Shawn earns $3.50 per hour for the first 40 hours worked in a week and $20.25 per week, for hours over 40. If he earns $661.50 in one week, how many hours did he work?

*March 17, 2016 by Anonymous*

**science**

joey drives his car 7 kilometers north. he stops for lunch and then drives 5 kilometers south. what distance did he cover?

*January 27, 2014 by aly*

**BUSINESS MATH**

A worker is paid $9.80 per hour, with time and a half for any hours over 40 per week. If he works 44 hours in a week, what will be his gross pay amount

*November 7, 2013 by Anonymous*

**basic mathematics**

if a centimeter represents 25 kilometers on a map, what is the distance in kilometers between two points that are 4.5 centimeters apart on the map?

*April 10, 2013 by vanessa*

**Math**

How many hours does it take for the hour hand to travel as far as the minute hand travels in 40 minutes?

*April 21, 2013 by Liz Marie*

**Math**

How many hours does it take for the hour hand to travel as far as the minute hand travels in 40 minutes?

*April 21, 2013 by Liz Marie*

**Physics**

use the face that the speed of light in a vacuum is about 3.00 x10^8 m/s to determine how many kilometers a pulse from a laser beam travels in exactly eighteen hours

*September 8, 2011 by John*

**math**

A motorcycle leaves Colorado Springs traveling north at an average speed of 47 miles per hour. One hour later, a car leaves Colorado Springs traveling south at an average speed of 54 miles per hour. How long after the motor cycle leaves will it take until they are 552 miles ...

*May 31, 2011 by elaine*

**math**

You travel upstream for 3 hours. The return trip takes only 2.5 hours because you are traveling 2 mph faster. Determone the boats speed up river.

*September 27, 2016 by T*

**Math**

A truck tire with a diameter of 36 in is rolling over level ground spinning at 11 rotations/second. If the speed limit is 55 miles per hour and the penalty is $20 per hour over the speed limit, should the driver be fined and if so, how much?

*August 26, 2012 by KC*

**Geology**

Could someone please help me with this question? How many cubic kilometers of water reside within groundwater? My answer: 1.46 trillion cubic kilometers. Is this correct? Thanks for your help.

*September 20, 2009 by B.B.*

**Math**

Two trains are both traveling at a constant speed toward each other on neighboring tracks. The trains are 252 miles apart when they start traveling. They pass each other 4 1/2 hours later. One of the trains is traveling 25 3/4 miles per hour. What is the speed of the other ...

*March 17, 2016 by Anonymous*

**trig**

Two Airplanes leave an airport at the same time on different runways. One flies on a bearing of N66degreesW at 325 miles per hour. The other airplane flies on a bearing öf S26degreesW at 300 miles per hour. How far apart will the airplanes be after 2 hours?

*January 6, 2014 by nina*

**Chemistry**

Light travels at a speed of 3.00 times 10^10 cm/s. What is the speed of light in kilometers/hour?

*February 21, 2014 by Kelsi*

**Math**

Kevin Brownstein is a truck driver. He ears $10.25 per hour. He worked 37 hours last week. What is his straight time pay?

*February 27, 2012 by Sakiera*

**Earth Science**

5. Most tornadoes carry wind speeds that range from A. 105 to 177 km per hour. B. 178 to 266 km per hour. C. 267 to 322 km per hour. D. 1 to 105 km per hour. A?

*February 13, 2015 by Sarah *

**math**

two mechanics worked on a car the first mechanic worked for 5 hours and the second mechanic worked for 15 hours together they charged a total of 1750 what was the rate charged per hour by each mechanic if the sum of the two rates was 160 per hour

*March 5, 2013 by mace*

**algebra**

two mechanics worked on a car the first mechanic worked for 15 hours and the second mechanic worked for 5 hours together they charged a total of 1525 what was the rate charged per hour by each mechanic if the sum of the two rates was 175 per hour

*November 3, 2015 by Scott*

**math**

Two mechanics worked on a car. The first mechanic worked for 5 hours, and the second mechanic worked for 15 hours. Together they charged a total of $2025 . What was the rate charged per hour by each mechanic if the sum of the two rates was $205 per hour

*July 11, 2016 by jazmine*

**Math**

John makes $9.25 per hour. He gets time and a half for overtime. (Overtime is more than 40 hours per week.) How much money would he make for working 45 hours?

*July 24, 2016 by Unknown *

**algebra 1**

jan goes 6 kilometers east from home. mell goes 8kilometers north. how many kilometers are there schools apart. use Pythagorean theorem

*April 30, 2014 by lal*

**algebra**

David walked 19 kilometers. The first part of the walk was at 5kph and the rest at 3kph. he would have covered 2 kilometers less if he had reversed the rates, that is, if he had walked at 3kph and at 5kph for the same times that he actually walked at 5kph and 3kph, ...

*December 7, 2008 by jackie*

**math**

Complete in Metric Conversions: A dozer is traveling at 5 miles per hour. How many seconds will it take to travel 160 feet?

*March 27, 2012 by Amy*

**8th grade math**

One of your friends is heading north for the Christmas holiday and the other friend is heading south. If when they start, they are 1029 miles apart and one car is traveling at 53 miles per hour, and the other 45 miles per hour, how many hours before the two cars pass each other?

*December 14, 2011 by stella*

**7th grade math Ms. Sue please**

13. A baseball bat and 8 baseballs cost $163.25. The bat costs $106.45. What is the cost c of one baseball? (1 point) 163.25 – 8c = 106.45; $33.71 8c + 106.45 = 163.25; $7.10 8c + 163.25 = 106.45; $7.10 8c – 106.45 = 163.25; $33.71 14. Mark weighs 74 pounds. Together, he ...

*January 2, 2013 by Delilah*

**algebra**

A student runs 100 meters in 11 seconds. What is the speed of the student? speed = distance over time; 1 mile = 1609 meters 9.1 miles per hour 16 miles per hour 20.3 miles per hour 24 miles per hour pls help

*September 2, 2015 by oscar*

**Math**

Two mechanics worked on a car. The first mechanic worked for 10 hours and the second mechanic worked for 15 hours. Together they charged $2500. What was the rate charged per hour by each mechanic if the sum of the two rates was $195 per hour?

*October 1, 2016 by Nae*

**Python Programming**

Given a time in the 12 hour format with the suffix, either AM/PM, convert that into a 24 hour format. 12 hour format is hours:minutes:seconds followed by AM or PM, where the hours range is from 0 to 12, minutes range is from 0 to 59, second range is from 0 to 59. 24 hours ...

*September 1, 2016 by Rudra *

**Algebra**

An air plane can travel 560 miles per hour with the wind and 480 miles per hour against the wind. Determine the speed of the plane in still air and the speed of the wind.

*March 28, 2013 by Lora*

**math**

I need help to get started with writing the equation for the following problem: It takes a freight train 2 hours longer to travel 300 miles than it takes an express train to travel 280 miles. The rate of the express train is 20 miles per hour greater than the rate of the ...

*April 1, 2010 by fiona*

**math**

Two automobiles are 155 kilometers apart and traveling toward each other. One automobile is moving at 70 km/h and the other is moving at 32 km/h. In how many hours will they meet?

*October 10, 2014 by Ø£Ø³ÙŠÙ„*

**Algebra**

Al¡¦s Rentals charges $25.00 per hour to rent a sailboard and a wet suit. Wendy¡¦s Rentals charges $20.00 per hour plus $15.00 extra for a wet suit. Find the number of hours for which the total charges for both companies would be the same. ƒæ Let h represent the number ...

*November 15, 2014 by Taylor*

**physics **

Two trains 150 kilometer apart travel towards each other on parallel tracks, each moving at 25 kilometer per hour. A bird flies back and forth between the two trains at 50 kilometer per hour, until the train passes each other how far does the bird fly?

*September 26, 2016 by Justine *

**Algebra**

A car is traveling at an average speed of 54 miles per hours. How many minutes will it take the car to travel 117 miles

*May 8, 2014 by Anonymous*

**Consumer/Bus Math Sem 1 (Standard)**

Pat worked 43 hours and received $7.25 per hour for regular pay and time-and-a-half for all hours over 40 hours. What were her weekly earnings? $22.83 $322.63 $269.75

*December 18, 2012 by Erica*

**physic**

Block _____ Name ________________________________________ Date __________ Average Speed 1. In the 2008 Summer Olympics, Usain Bolt won the 100-m race in 9.69 s. What was his average speed? 2. Light from the sun reaches Earth in 8.3 min. The speed of light is 3.0108 m/s. How ...

*November 3, 2011 by Anonymous*

**math problem (please help)**

What are the dimensions of a rectangular tract of land if its perimeter is 70 kilometers and its area is 300 square kilometers? km (smaller value) akm (larger value)

*November 24, 2014 by angie*

**algebra1**

a tortoise can travel 10 cm per second. what is the tortoise's speed in feet per hour?

*September 8, 2015 by kathy*

**Chemistry**

(Help) (Problem) A radio wace travels 186,000 miles per second. How many kilometers will the wave travel in one microsecond? (1 mile= 1.61km) distance= timeinseconds/velocity change the given velocity in miles/hr to m/sec 186kmi/sec *1.6km/mi

*January 23, 2007 by Bryan*

**math**

You drove 2695 miles in 35 hours. (1) What is your average rate of change? (2) Suppose you can drive that distance at a legal 75 mile per hour rate. How long should it take you to complete the trip? (3) Suppose you are driving that distance at an illegal 86.8 miles per hour ...

*September 7, 2010 by melissa*

**alg**

1. (20 points) Police use the equation to estimate the speed (s) of a car, in miles per hour, based on the length (x), of its skid marks upon sudden braking on dry asphalt. a. Solve this equation for d. b. A motorist is involved in an accident. The skid marks are measured to ...

*July 23, 2011 by patricia*

**AlgebraII**

A train goes from boston to new york averaging 40 km per hour and returns averaging 60 km per hour. What is the average speed(it is not 50 km per hour) for the round trip?

*August 20, 2012 by Sarah*