Tutors Answer Your Questions about Miscellaneous Word Problems (FREE)
Question 1106910: A skydiver jumps from an altitude of 4000 m. Her height above the ground in metres after t seconds is given by the function h = -5t + 4000. She free falls until she is 875 m above the ground, then pulls her chute. How many seconds is her free fall? (Solve algebraically, not by graphing please)
Click here to see answer by addingup(3677)   |
Question 1106910: A skydiver jumps from an altitude of 4000 m. Her height above the ground in metres after t seconds is given by the function h = -5t + 4000. She free falls until she is 875 m above the ground, then pulls her chute. How many seconds is her free fall? (Solve algebraically, not by graphing please)
Click here to see answer by ikleyn(52747)  |
Question 1106924: Hi
betty Joanna and David shared a sum of money. Bettys share was half of the total amount received by Joanna and David. Joanna s share was 1/5 of the sum of money. If Betty received 80 dollars more than Joanna, what was the original sum of money.
Thanks
Click here to see answer by greenestamps(13195)  |
Question 1106634: Henry is tracking sales for his car dealership. In February, Henry sold 40% more cars than he did in January. In March, Henry sold 30% less cars than he did in January. If Henry sold 100 cars in January, how many cars did he sell in all three months?
Click here to see answer by Boreal(15235)  |
Question 1106955: Hi
Andrew Lionel and caroline shared a sum of money. Andrew's share was 0.25 of the total amount received by Lionel and caroline. Lionel s share was 1/3 of the sum of money. If andrew received 60 dollars less than Lionel, how much did Lionel receive.
thanks
Click here to see answer by greenestamps(13195) |
Question 1106955: Hi
Andrew Lionel and caroline shared a sum of money. Andrew's share was 0.25 of the total amount received by Lionel and caroline. Lionel s share was 1/3 of the sum of money. If andrew received 60 dollars less than Lionel, how much did Lionel receive.
thanks
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 1106970: An amount of distilled water is added to 2 quarts of 25% pure disinfectant to produce a 20% mixture. Determine amt. of water added.
Let x = amt. added.
25% means pure means 25% of any amt. would be pure.
25% of 2 quarts = .5 qts.
.25(2) + x = .20(.25 + x)
Not sure. Non-homework.
Click here to see answer by josgarithmetic(39613) |
Question 1106970: An amount of distilled water is added to 2 quarts of 25% pure disinfectant to produce a 20% mixture. Determine amt. of water added.
Let x = amt. added.
25% means pure means 25% of any amt. would be pure.
25% of 2 quarts = .5 qts.
.25(2) + x = .20(.25 + x)
Not sure. Non-homework.
Click here to see answer by josmiceli(19441)  |
Question 1107038: Hi
a train 128 meters long travelled through a tunnel at an average speed of 18m per sec. The whole train took 2min 36sec to pass through the tunnel. A car entered the same tunnel 1min later than the train. Both the train and the car reached their destination which was 2km awayfrom the tunnel at the same time.
How long was the tunnel
what was the average speed of the car in meters per second.
thanks
Click here to see answer by ikleyn(52747) |
Question 1107138: Jenna’s parents give her a gift of $15,000 to put in a college savings account for her son. She is deciding between two different plans: One pays 3.5% interest compounded daily, and the other pays 2.5% interest compounded quarterly. Which plan should she choose if she wants to maximize the amount in the account in 14 years?
Click here to see answer by Theo(13342)  |
Question 1107144: A 185 kg horizontal beam is supported at each end. A 320 kg piano rests a fifth of the way from one end.
What is the vertical force on the support closest to the piano?
_____N
What is the vertical force on the support furthest from the piano?
_____N
Click here to see answer by rothauserc(4718)  |
Question 1107143: A 185 kg horizontal beam is supported at each end. A 320 kg piano rests a fifth of the way from one end.
What is the vertical force on the support closest to the piano?
_____N
What is the vertical force on the support furthest from the piano?
_____N
Click here to see answer by Fombitz(32388)  |
Question 1107142: A 66 kg adult sits at one end of a 8.0 m long board. His 25 kg child sits on the other end.
(a) Where should the pivot be placed so that the board is balanced, ignoring the board's mass?
____ m (measured from the adult)
(b) Find the pivot point if the board is uniform and has a mass of 15 kg.
_____m (measured from the adult)
Click here to see answer by stanbon(75887) |
Question 1107229: I want to have more than ninety dollars in my bank account, before I go shopping. I have a total of fifteen dollars, and I will babysit to earn seven dollars and fifty cents an hour. How many hours will I need to babysit, until I can go shopping?
Click here to see answer by addingup(3677) |
Question 1107242: The number of marbles tht Matthew has is between 15 and 60. If he puts them into bags of 7, there will be 4 marbles left. If he puts them into bags of 8, there will be 5 marbles extra. How many marbles does Matthew have?
Click here to see answer by KMST(5328)  |
Question 1107279: Hailey would like to make a 5 lb coffee mixture that is 60% Sumatra coffee bean blend. She has
several pounds of a mixture that is 20% Sumatra beans and another mixture blend with 80%
Sumatra beans . Let x represent the amount of the 20% blend and y represent the amount of the
80% blend to find out how many pounds of each mixture Hailey will need.
(a) What is the system that models this situation?
(b) What is the solution to the system: Show your work.
Click here to see answer by Boreal(15235) |
Question 1107279: Hailey would like to make a 5 lb coffee mixture that is 60% Sumatra coffee bean blend. She has
several pounds of a mixture that is 20% Sumatra beans and another mixture blend with 80%
Sumatra beans . Let x represent the amount of the 20% blend and y represent the amount of the
80% blend to find out how many pounds of each mixture Hailey will need.
(a) What is the system that models this situation?
(b) What is the solution to the system: Show your work.
Click here to see answer by josgarithmetic(39613) |
Question 1107314: Physics problem. I have no clue where to even begin with this. Thank you!
A tennis player standing 12.6 m from the net hits the ball at 3.15° above the horizontal. To clear the net, the ball must rise at least 0.340 m. If the ball just clears the net at the apex of its trajectory, how fast was the ball moving when it left the racket?
Click here to see answer by Alan3354(69443)  |
Question 1107328: The Site for Sore Eyes video store offers two rental plans. The first Plan cost $22.50 per year plus $2 per video rented the second plan offers a free membership for one year the cost $3.25 per video rented. For how many rented videos will the cost of the two plans be the same?
Click here to see answer by josgarithmetic(39613) |
Question 1107324: I am selling T-shirts and sweatshirts for our school. The T-shirts cost $10 and the sweatshirts cost $25. I’m starting out with $50 in my box for change and now have 1400 in my box. I know I have sold five more than four times as many T-shirts or sweatshirts. How many of each do I sell
Click here to see answer by addingup(3677) |
Question 1107549: horses age more rapidly than humans supposed that the horses age and human age very directly and supposed to a five-year-old horses equivalent to a 15 year old human find the equivalent human age for a horse who has lived 16 years
Click here to see answer by stanbon(75887) |
Question 1107589: solve: rex can paint a motel room in 3h and carl can do it in 6h. they work together for 1h. how long will it take rex to finish the job alone?
please help me. i've tried to get this and i can't understand.
thank you so much!
Click here to see answer by math_helper(2461)  |
Question 1107415: A new park open on Monday with 45 visitors the manager estimates that the number of visitors doubled everyday for the previous day during its opening week about how many visitors did the park receive on Friday
Click here to see answer by Boreal(15235) |
Question 1107638: Using new equipment, a worker finished 4 more parts in an hour than was planned and fulfilled his daily task not in 8 hours, but in 6 hours. How many parts did the worker have to finish during the day according to the schedule?
Click here to see answer by ikleyn(52747) |
Question 1107663: Hi
there were 610 watches and pens in a box. 1/5 of the watches and 1/3 of the pens were from Japan.
The rest korea. If a total of 150 watches and pens were from Japan,
how many watches in the box
how many pens from Korea.
Thanks
Click here to see answer by Theo(13342) |
Question 1107461: The Hillcrest Garden Club wants to double the area of its rectangular rose bed. Strips of the same width will be added to one end and one side to form a rectangle. If the bed is now 17.5m by 12.2m, what are the dimensions of the new bed?
Click here to see answer by Theo(13342) |
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