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July 31, 2014

July 31, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Math-Help**

A rock is tossed straight up into the air. The height h (in feet) t seconds after it is tossed is given by the function: h(t)=-16t^2+100.4t+5.1 (a) Make a table of values for 0 to 10 seconds. (b) Graph the function. (c) What is the initial height of the rock? (d) When did the ...
*Monday, April 28, 2014 at 8:05pm*

**Math**

Please help.I need to find two- hundredth digit in the decimal representation of each of the following fractions 5/6 4/11 1/13 Thanks.
*Monday, April 28, 2014 at 8:04pm*

**math**

write and solve an equation to find the missing dimension of the rectangular prism. Volume= 1km cubic L=3/4 km W=2/3 km H= ?
*Monday, April 28, 2014 at 7:59pm*

**Math **

A calendar that has one page per day is 7 inches long, 7 inches wide, and 2 inches high. What is the volume of one page of the calendar? Round your answer to the nearest thousandth.
*Monday, April 28, 2014 at 7:38pm*

**Math**

What happens to the volume of a rectangular prism length, the width, and the height by 2?
*Monday, April 28, 2014 at 7:32pm*

**math**

A cube with side length 4 centimeters is 25% full of sand.What is the volume of the sand?
*Monday, April 28, 2014 at 7:31pm*

**Math**

A filling cabinet is 35 centimeters by 70 centimeters by 115 centimeters. The bottom drawer is 30% of the volume of the filling cabinet. What is the volume of the bottom drawer?
*Monday, April 28, 2014 at 7:29pm*

**Math**

A cell phone company charges a monthly fee of $17.95 and $0.03 per minute Write an equation that represents the cost (c) for using the cell phone for minutes (m) Use your equation from part a to find the cost for using the phone for 150 minutes
*Monday, April 28, 2014 at 7:18pm*

**math**

it cost $.15 to make copies at the library and a new printer cost $200 each copy is $.02 how many copies does it take to the cost at the library and from a new printer become equal
*Monday, April 28, 2014 at 7:14pm*

**Math**

Mary has a container of sugar in the shape of a cylinder the container has a diameter of 10 inches and a height of 6 inches if the container is full how much will the sugar weigh if the average weight of the sugar is 0.2 ounces per cubic inch round to the nearest tenth
*Monday, April 28, 2014 at 7:14pm*

**math**

How do I find the number of millimeters long a beak is?
*Monday, April 28, 2014 at 6:53pm*

**Math**

A ball is thrown downward from the top of a 100-foot building with an initial velocity of 14 feet per second. The height of the ball h after t seconds is given by the equation h=-16t^2-14t+100. How long after the ball is thrown will it strike the ground?
*Monday, April 28, 2014 at 6:15pm*

**math**

At a supermarket, pineapple juice sells at $1per unit (16ounces). Greg wants to buy eighteen 40- ounce cans of pineapple juice from the supermarket. How much does he have to pay altogether?
*Monday, April 28, 2014 at 5:47pm*

**Math**

Will bought a package of 24 juice bottles for $7.44. Which equation relates the cost, c, of a package of juice bottles to the number of bottles, b, in the package? A. C= 0.31b B. C= 3.10b C. C= 3.23b D. C= 7.44b Also, please show how you solved!!!
*Monday, April 28, 2014 at 5:41pm*

**math**

Dwayne answered 80% of the questions on a quiz correctly. If he answered 40 questions correctly, what was the total number of questions on Dwayne’s quiz?
*Monday, April 28, 2014 at 5:34pm*

**Math**

1. Sqrt 14r * 2 sqrt 4r Is this 4r sqrt 14? 2. (sqrt 64 y^10 h^5)/(sqrt 16 y^12 h^3) Is this (sqrt 4h^2)/(y^2)
*Monday, April 28, 2014 at 5:29pm*

**Math**

Simplify sqrt 250 j^4 o^5 Everything is under the radical.
*Monday, April 28, 2014 at 5:05pm*

**math**

Having a hard time with equal and groups.. 13 into 6 groups and what is left over..
*Monday, April 28, 2014 at 4:42pm*

**Math-Clarification**

Identify any real and extraneous solutions for the equations below. Sqrt p = -1 So, would this have no real or extraneous solutions?
*Monday, April 28, 2014 at 4:30pm*

**Math 3rd grade**

Lee wants to cut this piece of canvas into two rectangles that are 3 x 2 and 3 x 5. He wants the sum of the areas of the two small rectangles to be the same as the area of the large rectangle. Can he do this? explain.
*Monday, April 28, 2014 at 4:11pm*

**Math**

find the elapsed time start time-3:30 pm end time-7:00 pm please help !!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!...
*Monday, April 28, 2014 at 3:43pm*

**Math**

Simplify (3 sqrt 8 + 4 sqrt 9)^2.
*Monday, April 28, 2014 at 3:05pm*

**math**

2x+8=3x+2 Can you please help me solve this one problem please
*Monday, April 28, 2014 at 3:02pm*

**math**

5x-2(x+4)=3(2x+1) How can I solve this problem please help me
*Monday, April 28, 2014 at 3:00pm*

**Math**

Identify any real and extraneous solutions for the equations below. Sqrt p = -1
*Monday, April 28, 2014 at 2:06pm*

**Math**

6. Which is the best measure of central tendency for the type of data below-the mean, the median, or the mode? Explain. Hours of sleep each night A. Median; there will be outliers B. Range; there are no outliers C. Mode; the data are non-numeric D. Mean; the outliers are ...
*Monday, April 28, 2014 at 1:57pm*

**math**

Evidence of an increased risk of lung cancer associated with cigarette smoking was sought by Doll and Hill. In one study, 649 lung cancer cases were matched by age, and gender to 649 controls; 647 of the cases and 622 of the control had a history of smoking cigarettes. a. Name...
*Monday, April 28, 2014 at 1:39pm*

**Math**

How many ways can seven children sit on a bench? How many of these arrangements are the two oldest always together?
*Monday, April 28, 2014 at 1:16pm*

**math**

The length of a rectangle is 3b + 2 and the width is 9b + 6. What is the ratio of its length to its width?
*Monday, April 28, 2014 at 1:06pm*

**math**

the length of a rectangle is 3 times its breadth.its perimeter is 64cm.find its length?
*Monday, April 28, 2014 at 12:33pm*

**Math 1314**

A pond is enclosed by a wooden deck that is 3 feet wide. The fence surrounding the deck is 100 feet long. If the pond is rectangular and the length of the pond is to be three times its width, what are its dimensions?
*Monday, April 28, 2014 at 11:50am*

**math**

25+6
*Monday, April 28, 2014 at 11:11am*

**Math**

A 12 cm by 12 cm ice cube tray is in the shape of a cuboid with twelve hemispheres inset. The depth of each hemispheres is 1 cm. a) If all the hemispheres were filled with water, calculate the total volume of water that the ice cube tray could hold. It is now desired to paint ...
*Monday, April 28, 2014 at 11:01am*

**math question**

If jack has a 63% as his grade.If he takes a test worth 9% and got 10/10 what would his grade be then?
*Monday, April 28, 2014 at 9:39am*

**Math**

Ryan left the science museum and drove south. Gabriella left three hours later driving 42 km/h faster in an effort to catch up to him. After two hours Gabriella finally caught up. Find Ryan's average speed
*Monday, April 28, 2014 at 9:11am*

**math **

A 12 cm by 12 cm ice cube tray is in the shape of a cuboid with twelve hemispheres inset. The depth of each hemispheres is 1 cm. a) If all the hemispheres were filled with water, calculate the total volume of water that the ice cube tray could hold. It is now desired to paint ...
*Monday, April 28, 2014 at 8:16am*

**math**

1.FIND the bank discount and proceeds on the following loans i) RM4000 FOR 3 MONTHS at 10 1/2 percent ii) RM4215 FROM 10 june to 5 august of the same year at 10 percent
*Monday, April 28, 2014 at 7:21am*

**Math**

A swimming pool is in the shape of a cuboid with dimensions 50 metres long by 25 metros wide by 2.5 metres deep. If the pool is completely filled with water, calculate a) the volume of water in the pool b) the longest straight distance a swimmer could swim in the pool c0 the ...
*Monday, April 28, 2014 at 3:33am*

**math**

A 12 cm by 12 cm ice cube tray is in the shape of a cuboid with twelve hemispheres inset. The depth of each hemispheres is 1 cm. a) If all the hemispheres were filled with water, calculate the total volume of water that the ice cube tray could hold. It is now desired to paint ...
*Monday, April 28, 2014 at 3:28am*

**Math**

Mrs. Smith surprised her 30 students with cookies. She gave them a choice of chocolate chip, peanut butter and sugar cookies. 5 students had only a chocolate chip cookie, 3 had only a peanut butter cookie, and 2 had only a sugar cookie. 5 students had a chocolate chip cookie ...
*Sunday, April 27, 2014 at 11:37pm*

**Math**

bills' trail mix has 6 cups of walnuts and 10 cups of cranberries. using the same recipe, how many cups of walnuts go with 15 cups of cranberries
*Sunday, April 27, 2014 at 11:28pm*

**math (2)**

Find the area of the shaded region y= 2x/(x^2+4) from x= -2 and x= 2 Note: People have been telling me that the two lines do not intersect but they do there has to be an answer. please help me. Thanks
*Sunday, April 27, 2014 at 10:36pm*

**Math emergency I have 10 minutes to submit it.**

A supplier of portable hair dryers will make x hundred units of hair dryers available in the market when the unit price is p = sqrt(81 + 1.6x) dollars. Determine the producers' surplus if the market price is set at $11/unit. (Round your answer to two decimal places.)
*Sunday, April 27, 2014 at 9:55pm*

**Math emergency I have 10 minutes to submit it.**

The demand function for a certain brand of CD is given by p = −0.01x^2 − 0.1x + 14 where p is the wholesale unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. Determine the consumers' surplus if the market price is ...
*Sunday, April 27, 2014 at 9:55pm*

**Math emergency I have 10 minutes to submit it.**

Find the area of the shaded region. y= x-2 y= sqrt(x)
*Sunday, April 27, 2014 at 9:54pm*

**Math emergency I have 10 minutes to submit it.**

Find the area of the shaded region. y= 0 y= x^4-2x^3
*Sunday, April 27, 2014 at 9:53pm*

**Math 120**

Drop a stone in a well, the sound is heard 17 seconds later. How deep is the well in feet
*Sunday, April 27, 2014 at 9:39pm*

**Math HELP HELP**

what about this one On a voyage to Atlantis, Ariel from The Little Mermaid decided to pick up shells so that she could make necklaces for her mermaid friends. She picked up 30 green shells, 35 blue shells, and 30 yellow shells. 17 of the green shells had some blue in them. 15 ...
*Sunday, April 27, 2014 at 9:25pm*

**math/ratio**

apples,oranges and pears are packed into a basket in the ratio 3:5:1. there are 12 more oranges and pears than apples.how many fruits are there altogether?
*Sunday, April 27, 2014 at 9:13pm*

**MATH**

JOSH CAN JOG 1 AND 1 THIRD MILES IN A QUARTER OF AN HOUR. WHAT IS HIS AVERAGE SPEED IN MILES PER HOUR
*Sunday, April 27, 2014 at 9:05pm*

**Math**

Three green balls and two yellow balls are placed in a hat. Two balls are randomly drawn without replacement. Let X be the number of green balls drawn. i)X=1
*Sunday, April 27, 2014 at 7:34pm*

**math**

At 3:00 PM a man 146 cm tall casts a shadow 136 cm long. At the same time, a tall building nearby casts a shadow 177 m long. How tall is the building?
*Sunday, April 27, 2014 at 6:58pm*

**math, geometry**

The bases of trapezoid ABCD are \overline{AB} and \overline{CD}. Let P be the intersection of diagonals \overline{AC} and \overline{BD}. If the areas of triangles ABP and CDP are 8 and 18, respectively, then find the area of trapezoid ABCD.
*Sunday, April 27, 2014 at 6:41pm*

**Math**

Nene buys a bowling ball that weighs 10 pounds 13 ounces at a sporting goods store.What is the total weight of the bowling ball in ounces?
*Sunday, April 27, 2014 at 6:34pm*

**math**

Formerly 1/6 of a pie cost 20 cents.Now the price of 1/8 of a pie is 30 cents.The per cent increase is a. 10% b. 20% c. 33 1/3% d. 50% e. 100% My answer is d, anybody can tell me right or wrong, if wrong tell me the answer 1/6 cost 20 cent 1/8 cost 30 cent 20/100=0.2 20-30 ...
*Sunday, April 27, 2014 at 6:15pm*

**Math**

What is the Schlafli Notation?
*Sunday, April 27, 2014 at 6:07pm*

**Math- urgent**

Harry buys American cheese at the deli. He buys 1/4 pound at the cost of x dollars per pound. If he pays $12.25 for 2.5 pounds of cheese, what is the cost per pound? Please show your work.
*Sunday, April 27, 2014 at 5:22pm*

**Math- urgent**

Z/2-6=4 What does z equal? Please show your work.
*Sunday, April 27, 2014 at 5:18pm*

**math**

The oil burner in a certain house is used to heat the house and to heat the hot water.During the seven cold months when the house is heated, an average of 200 gallons of oil a month is used.In the remaining five months, when the house is not heated, a total of 200 gallons of ...
*Sunday, April 27, 2014 at 5:13pm*

**math**

A pond 100 feet in diameter is surrounded by a circular grass walk which is 2 feet wide .The number of square feet of grass on the walk is a. 4 pi b. 20 pi c. 196 pi d. 204pi e. 270 pi please answer and explain
*Sunday, April 27, 2014 at 4:22pm*

**math**

is 100 over 1000 10%?
*Sunday, April 27, 2014 at 4:13pm*

**math**

Use this rule to find the number of feet of lumber in a log:"Take 4 inches off the diameter of the log, multiply the remainder ( in inches ) by one half ot itself, then by the length of the log in feet, and divide the product by 8." According to this rule, the number...
*Sunday, April 27, 2014 at 3:34pm*

**math**

write an equivalent expression to the expression below.(17*93) (17*97)
*Sunday, April 27, 2014 at 3:25pm*

**math**

If the area of a circle is twice the area of a triangle whose base is 4 pi and whose altitude is 4, the radius of the circle equals a. square root 32 b. 2 c. 4 d. 8 e. 32 please answer and explain
*Sunday, April 27, 2014 at 2:50pm*

**math**

AOD is a diameter of circle O. The coordinates of points A and D are (-11,-5)and (-3,-5)Find the area of circle O. a. 9 pi b. 16 pi c. 25 pi d. 64 pi e. 116 pi please answer and explain
*Sunday, April 27, 2014 at 2:47pm*

**math**

The number of diagonals, d, in a polygon of n sides is given by the formula d=n^2-3n/2. If a polygon has 90 diagonals, how many sides has it? a. 8 b. 10 c. 12 d. 15 e. 20 please answer and explain
*Sunday, April 27, 2014 at 2:44pm*

**math**

A stick 35 inches long is to be cut so that one piece is 1/4 as long as the other. How many inches long must the shorter piece be? a. 5 b. 7 c. 10 d. 12 e. 15 please answer and explain
*Sunday, April 27, 2014 at 2:03pm*

**math**

Martin rides to Cambridge 30 miles away from home at the average rate of 10 miles per hour.He returns on a better road that is 50% longer where he can increase his rate by 100%.How much time does he save by taking the better road on his return trip? a. 2 1/4 minutes b. 15 ...
*Sunday, April 27, 2014 at 1:58pm*

**math**

At the end of spring training a football coach discharged 1/5 of his squad and asked the remaining 32 boysw to report on Labor Day. The number of boys on the squad at the end of spring training was a. 40 b. 80 c. 100 d. 120 e. 160 please answer and explain
*Sunday, April 27, 2014 at 1:54pm*

**math**

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -9x2 + 2x + 4.
*Sunday, April 27, 2014 at 1:23pm*

**Math**

a random sample of 28 patients across the country had an average cost of 5250 with a standard deviation of 629.at a= 0.025 can it be concluded that the mean is less than 5400
*Sunday, April 27, 2014 at 12:54pm*

**Math**

How many different ways can you write a^(m/n)?
*Sunday, April 27, 2014 at 12:52pm*

**Math**

Write the inequality and solve: The product of a number and 7 is less than 28
*Sunday, April 27, 2014 at 12:49pm*

**Math**

Evaluate -3 *x^2+2*y^2 for x=-1 and y=4
*Sunday, April 27, 2014 at 12:39pm*

**Math**

Solve: 5/6x -3=12
*Sunday, April 27, 2014 at 11:15am*

**Math**

A model plane flies 18ft per 2 seconds. What is the plane's speed in miles per hour? Round to the nearest tenths.
*Sunday, April 27, 2014 at 10:43am*

**Math - Trigonomety**

A plane is flying at a height of 1000 feet. A passenger on the plane sees a tree and realizes the angle of depression to the top of the tree is 15 degrees and the angle of depression to the bottom of the tree is 25 degrees. How tall is the tree?
*Sunday, April 27, 2014 at 9:32am*

**math**

Steve earned scores of 96 and 87 on his first two exams. What will his average grade be if he gets a 72 on his third exam?
*Sunday, April 27, 2014 at 7:22am*

**math ratio**

a:b=2:3,b:c=5:6 and c:d=3:8. FIND THE RATIO A:B:C:D.
*Sunday, April 27, 2014 at 5:44am*

**math**

train a moving at 30km/hr passes station at 08:00.A train B travelling the same way at 45km/hr passes this station at 08:30, at what time will train B overtake A please can someone explain to me
*Sunday, April 27, 2014 at 5:40am*

**Math**

A 12 cm by 12 cm ice cube tray is in the shape of a cuboid with twelve hemispheres inset. The depth of each hemispheres is 1 cm. a) If all the hemispheres were filled with water, calculate the total volume of water that the ice cube tray could hold. It is now desired to paint ...
*Sunday, April 27, 2014 at 3:58am*

**math**

determine the intervals for which the curve r(t)=4sin^3(t)i+7cos^3(t)j is smooth on [0,2π
*Sunday, April 27, 2014 at 3:57am*

**Math**

What is the interest due on $57,000 at 7 1/2% from June 2008 until today
*Sunday, April 27, 2014 at 3:24am*

**Math**

If I spend 2/3 of my allowance on CDs and 1/6 on DVDs how much did I save
*Sunday, April 27, 2014 at 2:13am*

**Math (6)**

Find the area of the following two curves. y= sqrt(x) y= x-2 Note: People have been telling me that the two lines do not intersect but they do there has to be an answer. please help me. Thanks
*Saturday, April 26, 2014 at 10:41pm*

**math (4)**

Sketch the graph (Do this on paper. Your teacher may ask you to turn in this graph.) and find the area of the region bounded below by the graph of the function and above by the x axis from x = 0 to x = 1. f(x) = -xe^(-x^2) Note: People have been telling me that the two lines ...
*Saturday, April 26, 2014 at 10:40pm*

**math (2)**

Find the area of the shaded region y= 2x/(x^2+4) from x= -1 and x= 1 Note: People have been telling me that the two lines do not intersect but they do there has to be an answer. please help me. Thanks
*Saturday, April 26, 2014 at 10:39pm*

**math**

What is 9.2-3567+(87+2-6736)
*Saturday, April 26, 2014 at 9:21pm*

**Math**

An exponential function with a base of 3 has been vertically stretched by a factor of 1.5 and reflected in the y-axis. Its asymptote is the line y=2. Its y-intercept is (0,3.5). Write an equation of the function and state its domain and range.
*Saturday, April 26, 2014 at 8:36pm*

**Math**

lets start over with this problem: n^2 - 9n + 9 how do you determine if this is a perfect square, and can you factor it?
*Saturday, April 26, 2014 at 5:50pm*

**MATH**

is the polynomial:: y^2-25x+25 a difference of squares, if so factor it. Thank you so much!!
*Saturday, April 26, 2014 at 5:15pm*

**Math**

Is: n^2-9n+9 a perfect square??
*Saturday, April 26, 2014 at 5:09pm*

**Math**

Simplify. 12n^2m^4 ________ 28n^4m^3 thank you!
*Saturday, April 26, 2014 at 4:53pm*

**Math**

F(x)=x^2-2x-3 plz help me slove this ? HELP ME I DO NOT UNDERSTAND THIS HELP ME PLZ
*Saturday, April 26, 2014 at 3:56pm*

**Math**

The public library has an aquarium in the shape of arectangle prism . The base is 6 feet by 2.5 feet and the height is 4 feet . How many square feet of glass were used to build the aquarium (the top of the aquarium is open).
*Saturday, April 26, 2014 at 3:04pm*

**Math **

I'm extemely lost at some point, how do you solve this equation by using the inverse of the coefficient matrix and by echelon method -x-8y=12 3x+24y=-36
*Saturday, April 26, 2014 at 2:39pm*

**Math**

Gina is adding a lace border to a circular pillow. The raduis of the pillow is approxmately 8 inches,and she needs to decide how much lace to buy. What length should she buy?
*Saturday, April 26, 2014 at 1:15pm*

**math**

F(x)=x^2-2x-3 plz help me slove this ?
*Saturday, April 26, 2014 at 11:28am*

**math**

If a movie starts at 12:10pm and is 2 hours 20 minutes long. What time will the movie end?
*Saturday, April 26, 2014 at 10:43am*

**math**

(-3)^5
*Saturday, April 26, 2014 at 10:33am*

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