Tutors Answer Your Questions about Miscellaneous Word Problems (FREE)
Question 586250: Each song on a personal music player requires approximately 4 megabytes(MB)(4x10^6 bytes) of memory. If you purchase a personal music player with 80 gogabytes(GB)(6x10^10 bytes) of memory, aproximatley , how many song can you store on this player? Help, I have no clue how to set this up?! Thank you any help you can give!!
Click here to see answer by stanbon(75887)  |
Question 586549: You go to the doctor and he gives you 14 milligrams of radioactive dye. After 20 minutes, 4.25 milligrams of dye remain in your system. To leave the doctor's office, you must pass through a radiation detector without sounding the alarm. If the detector will sound the alarm if more than 2 milligrams of the dye are in your system, how long will your visit to the doctor take, assuming you were given the dye as soon as you arrived? Give your answer to the nearest minute.
Click here to see answer by stanbon(75887) |
Question 586574: (1)The half-life of Palladium-100 is 4 days. After 20 days a sample of Palladium-100 has been reduced to a mass of 2 mg. What was the initial mass (in mg) of the sample?
What is the mass 4 weeks after the start?
(2)A wooden artifact from an ancient tomb contains 50 percent of the carbon-14 that is present in living trees. How long ago was the artifact made? (The half-life of carbon-14 is 5730 years.)
Your answer is how many years.
(3)At the beginning of an experiment, a scientist has 196 grams of radioactive goo. After 270 minutes, her sample has decayed to 3.0625 grams.
What is the half-life of the goo in minutes?
Find a formula for G(t), the amount of goo remaining at time t. G(t) =
How many grams of goo will remain after 38 minutes?
(4)The decibel level of a sound is given by dB = 10log(\frac{E}{E_0}), where E_0 = 10^{-12} \: \frac{\text{watts}}{m^2} and E is the intensity of the sound.
(a) Find the intensity of a 120-decibel sound.
E = watts per square meter.
(b) How many times more intense is the sound from (a) than a 60-decibel sound?
A sound at 120 decibels is times more intense than a sound at 60 decibels.
Click here to see answer by solver91311(24713)  |
Question 586751: Give an example of a quadratic equation that satisfies each given condition:
1.) Has two equal real-number solutions.
2.) Has two distinct real-number solutions.
3.) Has non-real-number solutions.
Once again, help greatly appreciated. Thanks! :)
Click here to see answer by ad_alta(240)  |
Question 586729: Good day once again!
Word Problem:
It takes 3 more hours for Nadine to finish a computer project than for her friend Sandra to do the same. Working together, they can finish the project in 2hours. How long will it take Nandine to do the project alone.
Click here to see answer by scott8148(6628)  |
Question 587427: You have a bag of marbles. There are twice as many blue marbles as red marbles. There are 4 less green marbles than red marbles. If there are 28 marbles in the bag, how many of each marble is in the bag. Use the 5 step solution, please.
Click here to see answer by stanbon(75887) |
Question 587446: On Monday, Mr. Toad bought 10 gourmet flies and 4 gourmet worms for $34. On Tuesday he bought 6 gourmet flies and 12 gourmet worms for $30. Find the price of a gourmet fly and the price of a gourmet worm. Use the 5 step solution with 2 variables, please
Click here to see answer by stanbon(75887) |
Question 587424: For most flying creatures, the length of the wing varies inversely as the number of wingbeats per second. A dragonfly has a winglength of 1.6 inches and a wingspeed of 45 times per second. If a bee has a wingspeed of 200 beats per second, what is the length of a bee's wing?
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 588102: A sample of cupcakes contains 124 pink ones with 3 white ones. How many white ones can you expect in a sample of 1270 total cupcakes?
Please show all steps
I get a decimal and believe it is incorrect, thank you for the assistance
Click here to see answer by stanbon(75887) |
Question 588576: The resistance of a wire varies directly with its length and inversely with the square of its diameter. If 100 feet of wire with diameter 0.01 inch has a resistance of 90 ohms, what is the resistance of 68 feet of the same type of wire if its diameter is 0.02 inch?
Click here to see answer by Theo(13342)  |
Question 588867: A photograph is 8in by 10in.
A. Write an equation to find the amount x that should be added to the current length and width to double the area of the photograph.
B. Solve the equation.
C. What will the new dimensions be?
Thank you soo much if you answer this.
Click here to see answer by jim_thompson5910(35256) |
Question 588735: The ABC Car Rental Company uses the function f(x)=26 for any daily use of a car up to and including 250 miles. For driving more than 250 miles per day, it uses the function g(x)=26+0.1(x-250) to determine the charges, where x is the number of miles driven. How much would the company charge for a daily driving of 110 miles?
Click here to see answer by KMST(5328)  |
Question 589026: The mass of a radioactive element at time x is given by the equation below, where c is the original mass and h is the half-life of the element. How old is a mummy that has lost 55% of its carbon-14 (its half-life is 5730 years)? (Round your answer to the nearest year.)
Formula given M(x)= c(.5^x/h)
Please help me solve this problem please.
Click here to see answer by ankor@dixie-net.com(22740) |
Question 588892: Please show work because the answer I am coming up with is not correct.Please help me.
The terminal is 30ft down the 10-ft driveway and on the other side. A contractor charges $3/ft alongside the driveway and $4/ft for underneath the driveway.
a. What will it cost if the contractor runs the pipe entirely under the driveway along the diagonal of the 30-ft by 10ft rectangle.
b. What will it cost if the contractor runs the pipe 30ft alongside the driveway and the 10ft straight across?
c. The contractor claims that he can doo the job for $120 by going alongside the driveway for some distance and then going under the drive diagonally to the terminal.Find x, the distance along side the driveway.
d. Write the cost as a function fo x and sketch the graph of the function.
e. Use the minimum feature of a graphing calcutor to find the appropriate value for x that will minimize the cost.
f. What is the minimum cost (to the nearest cent)of which the job can be done.
Click here to see answer by KMST(5328) |
Question 589726: One pipe fills a storage pool in 12 hours. A second pipe fills the same pool in 3 hours. When a third pipe is added and all three are used to fill the pool, it takes only 2 hours. Find how long it takes the third pipe to do the job.
I have trouble setting it up, but I know how to do it, please help!
Click here to see answer by ankor@dixie-net.com(22740) |
Question 590097: i have a word problem that i need assisstance with, i am in an algebra level course.the word problem is below.
Two mechanics worked on a car. The first mechanic worked for 20 hours, and the second mechanic worked for 15 hours. Together they charged a total of $3950 . What was the rate charged per hour by each mechanic if the sum of the two rates was 225 per hour?
Click here to see answer by stanbon(75887) |
Question 590730: A movie rental co has 2 plans. One charges $7 per month and $1 per movie rented. The other one charges $20 per moth and $.50 per movie. Bill has the first plan and Deanna has the second plan. Last month they both paid the exact same amount and rented the exact same number of movies. Exactly how much did they each pay ?
Click here to see answer by richwmiller(17219)  |
Question 590731: There are three different flavors of juice in a cooler.There is the same number of bottles of apple juice as grapefruit juice. There are four more bottles of orange juice than the other kinds combined. How many bottles of orange juice are there in the cooler?
Click here to see answer by Theo(13342) |
Question 590776: A radioactive substance has a decay rate of 1.8% per year. What is its half life? Give your answer correct to 2 decimal places.
The radioactive element carbon-14 has a half-life of 5750 years. The percentage of carbon-14 present in the remains of plants and animals can be used to determine age. How old is a skeleton that has lost 44% of its carbon-14?
Click here to see answer by ankor@dixie-net.com(22740) |
Question 590976: Terrell is thinking of 2 numbers. The sum of the numbers is 9. One of the numbers is 3 less than twice the other number. Which of the numbers below is the greater number?
The choices are: 6, 5, 4, 3 or 2
Click here to see answer by ad_alta(240) |
Question 591111: In the army kitchen there are four pots for every three pans for every 21 glasses. All together there are 476 of these items. How many pans are there?
a=pots; b=pans; c=glasses; So, 4a + 3b + 21c = 476
Now what?
Click here to see answer by Alan3354(69443)  |
Question 591317: Romeo bought a mixture of $0.25 , $0.50 and $0.75 valentines. The number of $0.25 valentines are three more then twice the number of $0.50 valentines. The number of $0.75 valentines was one less than the number of $0.50 ones. If he spent $5.25 all together how many of each kind did he buy? I need to solve this using letting x represent one number and y represent another.
Click here to see answer by richwmiller(17219) |
Question 591450: Enrollment at a particular online university is 11,600. There are
seven times as many students who work full time as there are students
who are not. HOW MANY STUDENTS WORK FULL TIME AND HOW MANY DO NOT.
Click here to see answer by rfer(16322) |
Question 592133: A golf ball is hit upward with a velocity of 66 feet per second (45 mph), its height h in feet above the ground after t seconds can be modeled by .
a. Determine when the ball strikes the ground.
b. When is the height of the ball 50 feet?
Click here to see answer by stanbon(75887) |
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