Monday

May 25, 2015

May 25, 2015

**math**

The life span of a DVD player produced by one major company is known to be normally distributed with a mean of 6.2 years. If 4.01% of these DVD players have a life span of more than 8 years, what is the standard deviation of the DVD player’s life span?
*Wednesday, April 15, 2015 at 2:54pm*

**math**

Test scores on a university admissions test are normally distributed, with a mean of 500 and a standard deviation of 100. a. What is the probability that a randomly selected applicant scores between 425 and 575? b. What is the probability that a randomly selected applicant ...
*Wednesday, April 15, 2015 at 2:53pm*

**math**

What is the probability that a randomly selected applicant scores between 425 and 575? a. What is the probability that a randomly selected applicant scores between 425 and 575? b. What is the probability that a randomly selected applicant scores 625 or more?
*Wednesday, April 15, 2015 at 2:50pm*

**even moar math**

You own 5 pairs of jeans and want to take 2 of them with you on vacation. In how many ways can you choose 2 pairs of jeans? - 10 ways - 15 ways - 4 ways - 20 ways **
*Wednesday, April 15, 2015 at 2:50pm*

**More math**

Simplify 9C4. - 126 *** - 15,120 - 5 - 3,024
*Wednesday, April 15, 2015 at 2:17pm*

**Math**

Simplify 6P2. - 30 - 15 *** - 12 - 720
*Wednesday, April 15, 2015 at 2:16pm*

**Simple math.**

Simplify 5! -5 -15 * -120 -125
*Wednesday, April 15, 2015 at 2:15pm*

**Math**

If a man runs for an hour and a half at 8 miles an hour due south; and then he continues south on a bus traveling at 55 miles an hour, for 24 minutes. How far did he travel?
*Wednesday, April 15, 2015 at 12:39pm*

**Math**

Without graphing, tell whether the line containing (6.-3) and (0,-8) is horizontal, vertical or neither. I believe it horizontal
*Wednesday, April 15, 2015 at 11:24am*

**math **

1. Name a pair of complementary angles. (1 point) angle sign1 and angle sign4 angle sign1 and angle sign2 .. angle sign3 and angle sign4 angle sign1 and angle sign6 2. If mangle sign1 = 37°, what is the measure of angle sign4? (1 point) 53° 43° 37° .. 27° 3...
*Wednesday, April 15, 2015 at 11:17am*

**Math**

can positive and negative X axis or positive and negative y axis have different scales? I mean that is it possible for positive and negative sides of a particular axis(X or Y) to have different scales if numbers to be plotted on one side large and small on the opposite side?...
*Wednesday, April 15, 2015 at 11:15am*

**math**

The value of the independent variable in a function is always __?__ the value of the independent variable A greater than B dependent on C equal to D less than
*Wednesday, April 15, 2015 at 10:52am*

**math**

Renee is a sales associate at a store. She earns $80 a week plus a 15% commission on her sales. Last week, she sold $200 worth of items. What is the total amount Renee earned for the week? How much did she earn from commission?
*Wednesday, April 15, 2015 at 10:51am*

**math**

Task is to construct two brick columns of the dimensions shown on which an iron gate will eventually be hung. Because the bricks measure 8" long by 3 1/2" wide by 2 1/2" high, you decide to build each column by laying the bottom row of bricks as shown.
*Wednesday, April 15, 2015 at 10:45am*

**6th Grade Math**

Hi, can someone please give me a few examples of how people use functions in the real world and explain them too? Thank You :)
*Wednesday, April 15, 2015 at 10:11am*

**math**

bruno is measuring water for an experiment. he fills a 2 litre container and a half liter container. how much water does bruno use altogether? give your answer in millilitres.
*Wednesday, April 15, 2015 at 10:09am*

**Math**

Determine which ordered pair is a solution of y=x2 -2. (-2,6) (5,21) (-1,-1) (-5,24)
*Wednesday, April 15, 2015 at 8:40am*

**math**

find the length of an arc of a circle of radius 5.6 cm which subtends an angle of 60 degrees at the centre of the circle.(take pie as 22 divided by 7.)
*Wednesday, April 15, 2015 at 7:56am*

**math**

suppose a hat containing 100 balls consists of 20blue ball,30yellow balls,30red balls and 20green balls.a sample of 5 balls is drawn from the hat one by one without replacement.what is the probability that there will be 2blue balls in the sample
*Wednesday, April 15, 2015 at 7:06am*

**math**

Given the equation - 3x +2y =4. Write another linear equation that will form a linear system with exactly one solution? I usually try to answer b4 i ask question But this time i'm really stuck. plz help ?
*Wednesday, April 15, 2015 at 1:56am*

**math**

Assume the brakes of an automobile produce a constant deceleration of k ft/sec^2. Determine what k must be to bring an automobile traveling 60 mph to a rest in a distance of 100 ft from the point where breaks are applied? With the same k, how far would a car traveling 30mph ...
*Wednesday, April 15, 2015 at 1:34am*

**Math**

Each day Julia's math Teacher gives class a warm up qs. It's true/false 20% of the times and multiple choice 80% . Julia gets 70% on true false correct and 90% on multiple choice correct. Julia answered today's question correctly. What's the probability that it...
*Wednesday, April 15, 2015 at 12:55am*

**math **

Elin estimates her probability of passing French 0.6, passing chemistry is 0.8, (a)determine the probability that elin will pass French but fail chemistry (b) pass chemistry but fail French (c) pass both classes (d)fail both classes
*Wednesday, April 15, 2015 at 12:23am*

**algebra**

I need some help with this math problem: Let n be the number of oil refineries at t years since 2005. A reasonable model of oil refineries is n= -2.23t + 210.53. What is the slope of this model? What does it mean in this situation?
*Wednesday, April 15, 2015 at 12:19am*

**math**

A rectangular pool measures 20ft by 30ft. It is bordered by a tiled walkway that is 7 ft wide. What is the area of the walkway?
*Tuesday, April 14, 2015 at 11:47pm*

**math**

Jeff is replacing the tile on his floor. he pans to use square tiles that are 11 inches on a side. the floor is 8 feet long and 6 feet wide. cabinet in the middle of the floor that will not need tile. this space is 2 feet wide and 3 feet long. estimate how many title will be used
*Tuesday, April 14, 2015 at 11:45pm*

**math **

Consider the equation y^2-12y=c, where c is a real constant. Assuming this equation has two distinct solutions y_1 and y_2, in terms of c, determine y_1y_2. i tried 12 and 0 they were both wrong,i have no idea what else to try
*Tuesday, April 14, 2015 at 11:34pm*

**Math**

How would you fine the relative extrema of f(x)=x+8^-x ? I know the first step is to find the derivative, which when I did I got f'(x)=1+[(-1)(ln(8))(8^-x)] Did I find the derivative correctly? And if I did, how do I find the zeroes of that??
*Tuesday, April 14, 2015 at 10:39pm*

**math**

three triangles inscribed in a square. All tangents. What is the radius?
*Tuesday, April 14, 2015 at 10:17pm*

**Math**

6.A rectangle has a coordinate at (3,5),(3,8) and (9,5).Plot the points to determine the coordinate of the fourth point. a)(-3,5) b)(9,8) c)(8,9) d)(-9,8)*** 9.What is the length of the line segment between M(2,-9) and N(2,-14)? a)5 units*** b)6 units c)15 units d)23 units
*Tuesday, April 14, 2015 at 10:04pm*

** math**

Jerry is packing cylindrical cans with diameter 6 in. and height 10 in. tightly into a box that measures 3 ft by 2 ft by 1 ft. All rows must contain the same number of cans. The cans can touch each other. He then fills all the empty space in the box with packing foam. How many...
*Tuesday, April 14, 2015 at 9:38pm*

**6th grade math**

Chris has made the following grades on five math test. 90,74,86,75,94 What score must Chris earn on the next math test to have a test average of exactly 85?
*Tuesday, April 14, 2015 at 9:17pm*

**6th grade math**

While battling a forest fire , Samuel was only able to get three hours of sleep during the first day. What was the percent of the day was Sam awake F. 87.5% G. 37.5% H. 90% J. 10%
*Tuesday, April 14, 2015 at 9:13pm*

**math**

20 percent of what number is 18
*Tuesday, April 14, 2015 at 8:44pm*

**math**

If we say that rare events are those events that happen with a probability of less than .05, then how many observations of men taller than 71 inches tall would you have to observe when randomly sampling before concluding that you had a rare sample? mean = 69, SD = 4
*Tuesday, April 14, 2015 at 8:22pm*

**Math**

The population of a small Midwestern town is 4500 The population is decreasing at a rate of 1.5% per year. Write an exponential decay function to model this situation. Then find the number of people in the town after 25 years.
*Tuesday, April 14, 2015 at 8:00pm*

**math**

Given these probabilities: pr(rain) = .2 pr(snow)=.1 pr(cloudy)=.5 and pr(sun)=.2 pr(crash|rain or snow) = .2 pr(crash|cloudy or sun) = .05 what is the probability of a car crash?
*Tuesday, April 14, 2015 at 7:59pm*

**math**

Numbers that are palindromes read the same forward and backward. For example, 30203 is a five digit palindrome. If a single number is chosen randomly from the set of all three-digit numbers, find the probability that it will be palindromic. Answer 1/10??
*Tuesday, April 14, 2015 at 7:56pm*

**math**

Determine the number of odd, nonrepeating three digits numbers that can be written using digits from the set {1, 2, 3, 4}.
*Tuesday, April 14, 2015 at 7:52pm*

**MATH**

whats the answer to this? write an equation fr an arithmetic sequence with a 1st term of 8 and 4th term of -7. im stuck.
*Tuesday, April 14, 2015 at 7:43pm*

**Math**

Is 12% greater than or less than 100%?Explain.
*Tuesday, April 14, 2015 at 7:39pm*

**Math**

Farmer John (not the bacon guy) raises ducks and cows. He has 54 animals which all together have 122 feet. How many of each type of animals does Farmer John have?
*Tuesday, April 14, 2015 at 7:26pm*

**math**

Marteen wants to paint 2/3 of her room today.She wants to paint 1/4 of that before lunch.How much of her room will she paint before lunch today? A.1/12 B.1/6 C.5/12 D.11/12
*Tuesday, April 14, 2015 at 6:31pm*

**Math**

Write a compount interest function to model each situation. Then find the balance after the given number of years $27,000 invested at a rate of 3.75% compounded quarterly; 3 years
*Tuesday, April 14, 2015 at 5:47pm*

**Math**

What percent is 3/8? a. 21 b. 38 c. 55 d. 68
*Tuesday, April 14, 2015 at 5:33pm*

**MATH WORD PROBLEM HELP PLEASE**

A water tank is in the shape of a right circular cylinder with a height of 20 feet and a volume of 320pi cubic feet. What is the diameter, in feet, of the water tank?
*Tuesday, April 14, 2015 at 5:32pm*

**math**

find the first 3 term s of an arithmetic sequence in which the 21 term is -54 and the fifteenth term is -170
*Tuesday, April 14, 2015 at 5:25pm*

**Math**

Neil needs to cut 3 long boards into 9 smaller boards. The first is 10 ft, the second is 16 ft, and third is 18 ft. The table lists the smaller boards Neil needs. Use a drawing to show how he can divide the 3 boards so there is no waste.
*Tuesday, April 14, 2015 at 5:06pm*

**Math**

Some number multiplied by -6 is 36. Multiply this number by 8. Divide the answer by 2. What is the final number?
*Tuesday, April 14, 2015 at 5:04pm*

**Math**

Some number added to -12 is 45. Add this number to 30. Multiply the answer by 3. What is the final number?
*Tuesday, April 14, 2015 at 4:49pm*

**math**

Neil needs to cut 3 long boards into 9 smaller boards. The first is 10 ft, the second is 16 ft, and the third is 18 ft. The table lists the smaller boards Neil needs. Use a drawing to show how he can divide the 3 boards so there is no waste. Length of board Number needed 4 ft ...
*Tuesday, April 14, 2015 at 4:45pm*

**Math**

Suppose the speedometer of your car reads 90 km/ hr. If you are driving in the united states where the maximum speed is posted as 50 mi/ hr By how much are you exceeding the speed limit.
*Tuesday, April 14, 2015 at 3:49pm*

**Math**

Can someone do out the calculations for me on 7 yds , 1 ft,- 3 yds, 2 ft,= what in ft . Thanks
*Tuesday, April 14, 2015 at 3:44pm*

**math analysis**

Two airplanes leave an airport at the same time. one travels in the direction of 38 degrees at 140mph and the other travels in the direction of 350 degrees at 180mph. After two hours, how far apart are they? Thanks
*Tuesday, April 14, 2015 at 3:07pm*

**Math**

The figure below represents a garden in which a flower bed ( inner rectangle) is to be installed. The garden ( excluding the flower bed) is to be sodded. The outer is 9' ft width and 15' ft long and the inner is 3'ft wide and 7'ft long. A) Find the area of the ...
*Tuesday, April 14, 2015 at 3:06pm*

**math**

You order sixteen burritos to go from a Mexican restaurant: seven with hot peppers and nine without. However, the restaurant forgot to label them. If you pick four burritos at random, find the probability that at least two of the burritos you pick have hot peppers.
*Tuesday, April 14, 2015 at 2:27pm*

**Math**

1. Simplify 6p2 a. 30*** b. 15 c. 12 d. 720 a. is my answer. is this correct?
*Tuesday, April 14, 2015 at 2:12pm*

**math**

Which number is not equal to one of the following expressions? 0.6038 x 1000 603.8 -: 10 60.38 -: 100 0.6038 603.8 60.38 6.038
*Tuesday, April 14, 2015 at 2:03pm*

**Math **

You order sixteen burritos to go from a Mexican restaurant: seven with hot peppers and nine without. However, the restaurant forgot to label them. If you pick four burritos at random, find the probability that at least two of the burritos you pick have hot peppers. i can ...
*Tuesday, April 14, 2015 at 1:17pm*

**Math**

6.A rectangle has a coordinate at (3,5),(3,8) and (9,5).Plot the points to determine the coordinate of the fourth point. a)(-3,5) b)(9,8) c)(8,9) d)(-9,8)*** 9.What is the length of the line segment between M(2,-9) and N(2,-14)? a)5 units*** b)6 units c)15 units d)23 units
*Tuesday, April 14, 2015 at 1:11pm*

**Math**

Triangle S(-6,10)T(-9,3)U(-3,3) is translated right 2 units and 3 units down. What are the coordinates of the vertices of the image? s'(-9,12), t'(-12,5), u'(-6,5) s'(-4,7), t'(-7,0), u'(-1,0) s'(-8,13), t'(-11,6), u'(-5,6) s'(-4,10), t...
*Tuesday, April 14, 2015 at 12:00pm*

**math**

You own 6 pairs of jeans and want to take 2 pairs on vacation with you. How many different ways can you take two pairs of jeans? 10 12*** 15 20
*Tuesday, April 14, 2015 at 10:39am*

**6th Grade Math Help & FAST!!!**

I only have 2 questions. 1 is multiple choice and one I have to type so please help. 1. Which set of output values correctly completes the function table? This is the function table: y= 2x - 4. Input (x) 6, 2, -4. Output (y) those three slots all have question marks. A. 8, 2...
*Tuesday, April 14, 2015 at 10:12am*

**math**

Methylpresnisolone (Solumedrol) is a glucocorticoid ordered for end-stage respiratory disease. You need to administer 125 mg IVP. It is available as 75 mg/mL. How many mL will you administer? Round to the nearest 10th mL. Write the NUMBER ONLY in the blank, not mL. I got 1.7 ml
*Tuesday, April 14, 2015 at 10:07am*

**math**

2x^2=64/x^2-4-x-4/x=8
*Tuesday, April 14, 2015 at 9:58am*

**Math**

Perform the calculations 6 ft, 5 in,-2 ft, 7 in = what in ft, and inches Thanks
*Tuesday, April 14, 2015 at 9:46am*

**Math**

Perform the following calculations 7 yds , 1ft -3 yds, 2 ft= what in ft Thanks
*Tuesday, April 14, 2015 at 9:44am*

**math**

Connections Academy what is 3! simplified as a 2 b 5 c 3 d 6*** simplify 10p4 a 210 b 360 c 5,040*** d 151,200 simplify 15c3 a 182 b 455*** c 2,730 d 910 my answers 1-d 2-c 3-b
*Tuesday, April 14, 2015 at 8:51am*

**Math**

Find the cost of shingles for the gable roof roof below if one bundle covers approximately 33ft2 and costs $29.95.The top is both ways is 12.7 meters and down is 7.5 meters . Thanks
*Tuesday, April 14, 2015 at 8:44am*

**math**

A5-digit number has 7 in its place The digit in once place is 5 less than its digits at tens place The hundreds place digit is 4 times the digit at once place The digit at thousands place is the same as at hundreds place sum of all the digits is 33 write the number in standard...
*Tuesday, April 14, 2015 at 8:32am*

**math**

why shud math be included in alll the streams
*Tuesday, April 14, 2015 at 4:25am*

**math**

who found a subject called math
*Tuesday, April 14, 2015 at 4:24am*

**Math**

1.Which pair of points forms a vertical line segment? a)(-3,5) and (5,-3) b)(4,-2) and (4,3)*** c)(-8,1) and (5,1) d)(2,3) and (-2,5) 2.What is the length of the line segment between A(-10,8) and B(-10,-3)? a)18 units*** b)5 units c)11 units d)12 units
*Tuesday, April 14, 2015 at 12:32am*

**Math**

1.If the coordinates of a point have opposite signs, which quadrants could the point be in? a)Quadrants I and II b)Quadrants I and III*** c)Quadrants II and IV d)Quadrants II and III 2.Which ordered pair would be plotted by starting from the origin and moving 1.25 units right ...
*Tuesday, April 14, 2015 at 12:04am*

**Math**

Find the cost of shingles for the gable roof below if one bundle covers approximately 33 ft to the power of two and costs $29.95. Length on top is 12.7 meters and down is 7.5 meters. Thanks
*Monday, April 13, 2015 at 11:45pm*

**Math**

Create two different situations: one in which you use combinations and one in which you use permutations. Include specific details and an explanation about what makes each situation either a combination or permutation. Can you give me some sites to look at? Thank you
*Monday, April 13, 2015 at 11:22pm*

**Math**

The voltage in an electrical circuit is multiplied by itself each time it is reduced. The voltage is 27/125 of a volt and it has been reduced three times. Write the voltage in exponential form.___________________________________ What was the original voltage in the ...
*Monday, April 13, 2015 at 10:49pm*

**math 8th grade**

Face cards are removed from a standard deck of cards and the rest are set aside. two cards are drawn at random from the face cards. once a card is selected, it is not replaced. Find each possibility. P(jack and then king)? P(two black cards) answer 1/2 ?
*Monday, April 13, 2015 at 10:08pm*

**Math**

A 1965 U.S. half dollar contains 2/5 ounce of silver. How many ounces of silver do 100 of those coins contain?
*Monday, April 13, 2015 at 10:01pm*

**Math**

Suppose the speedometer of your car reads 90km/hr. If you are driving in the United States where the maximum speed is posted as 50 mi/hr by how much are you exceeding the speed limit.
*Monday, April 13, 2015 at 9:57pm*

**Math**

A flagpole is 5.4 meters high . Express this height in feet and inches.
*Monday, April 13, 2015 at 9:54pm*

**Math**

A store sells boxes of chocolates wrapped with a bow . If the bow is made from a 15 inch length of ribbon: A) how much ribbon remains from a roll which is 10 yards long after 20 boxes have been wrapped? B) How many more boxes can be wrapped in this way? Thanks
*Monday, April 13, 2015 at 9:51pm*

**math**

How do i find the 12th term of the sequence 36,18,9.... using a formula
*Monday, April 13, 2015 at 9:44pm*

**Math**

The coordinates of a point p(a,2a) of line of point m(2a,3) and n(4,3). Find the value of a
*Monday, April 13, 2015 at 9:30pm*

**Math**

If 3 bricks weigh 9 pounds, 5 bricks weigh 15 pounds, and 8 bricks weigh 24 pounds, write an equation for the function and explain your variable choices. How do I do this?
*Monday, April 13, 2015 at 9:26pm*

**5th grade math**

Applying concept :calculate As of July 2004, the population of the United States was 293,027,571.if more than half of these people live within 80 kilometers of an ocean, about how many people live within that distance? Show your work.
*Monday, April 13, 2015 at 9:25pm*

**Math**

Lions spend about 5/6 of their days sleeping. How many hours a day does a lion sleep?
*Monday, April 13, 2015 at 9:00pm*

**math**

my math homework tells me to find the area of a circle using it's circumference. the circumference given was. can someone explain to me how to find the area?
*Monday, April 13, 2015 at 8:49pm*

**MATH**

I need help on number 3.the question is. According to information from NASA the space Shuttles external fuel tank has a capacity of about 500,000 gallons of fuel.Write three numbers that could represent the space Shuttles actual fuel capcity.
*Monday, April 13, 2015 at 8:27pm*

**Math**

Cho is driving a car. He gets to his destination, which is 72 miles away, in 1 hour and 30 minutes. a. The equation d=rt can be used to model Cho's drive, where d us the distance traveled, r is the speed of the car and, and t is the amount of time spent traveling. ...
*Monday, April 13, 2015 at 8:24pm*

**math**

a designer creates a drawing of a triangular sign on centimeter grid paper for a new business. the drawing has sides measuring 6 cm, 8 cm, and 10 cm, and angles measuring 37°, 53°, and 90°. to create the actual sign shown, the drawing must be dilated using a scale ...
*Monday, April 13, 2015 at 8:23pm*

**Math**

Rayshawn must run at least 15 miles per week. Write an inequality that represents the number of miles that Rayshawn must run. Would it be M < 15. _
*Monday, April 13, 2015 at 8:09pm*

**Math**

A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then a second marble is drawn. A) What is the probability of selecting a purple marble and then a white marble? B) What is the probability of selecting ...
*Monday, April 13, 2015 at 7:56pm*

**Math**

Patrice cuts a piece of board 4 feet long from a board that is x feet long. Find an expression that describes the length in feet of the original after the cut. a. 4 + x b. 4x c. 4 - x d. x - 4 I pick d, is that the correct answer?
*Monday, April 13, 2015 at 7:50pm*

**MATH**

WHAT IS GREEN AND MAKES HOLES?
*Monday, April 13, 2015 at 7:49pm*

**Math 1**

Ellen is making rectangular bookmarks. Each bookmark has an area of 16 square inches, and the length is 6 inches more than the width. Find the length and width of her bookmarks.
*Monday, April 13, 2015 at 7:45pm*

**Simple math**

Two standard number cubes are thrown. Given that one of the cubes shows a five, what is the probability that the sum of the numbers that come up on the two cubes is five?
*Monday, April 13, 2015 at 7:21pm*

**math**

Q. The rectangular-shaped doctor's office has an area of 120 square feet and a perimeter of 44 feet. What are the dimensions of this office space? - A. Do I add just add 120 by 44??
*Monday, April 13, 2015 at 7:09pm*

**Math**

Which fraction would fit between the 1/7 and 1/4? A. 1 over 5 B. 2 over 7 C. 1 over 3 D. 1 over 8
*Monday, April 13, 2015 at 6:46pm*

**math**

the diagram shows the length of the borders of the fence the length of the fence is 62 meters what is the unknown Length
*Monday, April 13, 2015 at 6:09pm*