# Posts by DELL

Total # Posts: 80

**science**

Mary and Tom park their cars in an empty parking lot with n >_ 2 consecutive parking spaces (i.e, spaces in a row, where only one car fits in each space). Mary and Tom pick parking spaces at random. (All pairs of parking spaces are equally likely.) What is the probability ...

*February 6, 2014*

**math**

A radio station's signal has a radius of 100 miles. If you drive at a constant speed of 40 miles an hour, nonstop, directly across the diameter of the signal, how long can you listen to the station before the signal fades?

*June 5, 2013*

**Physic**

The built-in composite bar BC of length L=2 m is composed of two materials with equal cross sectional area A = 100 mm2. The first material has elastic modulus E=1 GPa. The second material is twice as stiff, with a modulus of 2E or 2 GPa. The bar is subjected to an unknown ...

*May 9, 2013*

**Physic**

Now, obtain N(x) and plot it. In the Command Window below, enter expressions for N1 and N2 where N1 =N (x1) N2 =N (x2)

*May 9, 2013*

**MATH**

1. How would you prepare 950mlof 0.4M Nacl? 2.

*April 23, 2013*

**math**

refer to a seven piece tangram: a. if the original square made by the seven tangram pieces has an edge length of 2, what are the edge lengths of the small square piece? b.the parallelogram is what percent of the original square made by the seven tangram peieces? c. if the ...

*November 16, 2012*

**math**

each day, Jason walks to his office at a constant rate. one third of the way he passes a bank and three-fourths of the way to work he passes a store. at the bank his watch reads 6:52 am and at the store it reads 7:02 am. at what time was jason halfway to his offic?

*November 16, 2012*

**math**

in a box of cookies one sixth of the cookies are broken. There are 28 more whole cookies than broken cookies. How many cookies are in the box?

*November 16, 2012*

**math**

The ratio of the number of male students to the number of female students in a school is 3:8. How many students are there if there are 48 females?

*November 16, 2012*

**math**

Describe the use of the 10X10 grid to solve the following problem.Your telephone bill was $80 after a %25 increase. What was your bill before the increase?

*November 16, 2012*

**math**

Two cars leave the same point at noon. One car travels North and the other car travels East. Suppose the North bound car is travling 40mph and after two hours, the two cars are 100 miles apart. How fast is the other car going?

*November 2, 2012*

**math**

Mr Hash bought some plates at a yard sale. After arriving home he found that 2/3 of the plates were chipped, 1/2 were cracked, 1/4 were both chipped and cracked only 2 plates were w/o chips or cracks. How many plates did he buy in all?

*November 2, 2012*

**math**

thanks

*November 2, 2012*

**math**

$23.62 ?

*November 2, 2012*

**math**

an end-of-season sale for winter clothes advertise 30% to 45% off the original piece. What was the highest original price of a jersey that is now on sale for $12.99. Give your answer as a decimal rounded to the hundredths place.

*November 2, 2012*

**math**

if the $180 you spend on room and board represents 3/5 of your monthly income, what is your monthly income?

*November 2, 2012*

**Math**

A whole brick is balanced with 3/4 pound and 3/4 brick. What is the weight of the whole brick ? Use a visual solution process

*October 29, 2012*

**Math**

If there are 6 elements in ( A u B ) and 1 element in ( A n B ) answer the following A. What is the maximum number of elements possible for A? B. what is the least possible number of elements in B? C. If A has 'n' elements how many elements are in B?

*October 29, 2012*

**math**

If there are 6 elements in (A U B) and 1 Element in (A N B) answer the following: A. What is the maximum number of elements possible for A? B. What is the least possible number of elements in B? c. if A has "n" elements, how many elements are in B?

*October 26, 2012*

**math**

A whole brick is balanced with 3/4 pound and 3/4 brick. what is the weight of the whole brick?

*October 26, 2012*

**math**

1. five friends are standing in a lone of 7th graders to pick up their class schedules. Laura is the 20th person behind Rayma. Rayma is the 50th person ahead of Deanna. Deanna is the 10th person behind Charlotte. Shelly is the 30th person ahead of Laura. Charlotte is the 50th ...

*September 30, 2012*

**math**

What is the value of the following expression... 2-4+6-8+10-12+14-16+...-100

*September 30, 2012*

**math**

prove 5 divided by 17 equals 3 2/5 is correct?

*September 5, 2012*

**math**

if a student writes -3 4/5 equals -11/5 what mistake did they make?

*September 5, 2012*

**math**

make 24/9 a decimal

*September 4, 2012*

**math**

make 0.237 a fraction

*September 4, 2012*

**math**

make 2783/1000 a decimal

*September 4, 2012*

**math**

how can you help a student understand that decimal numbers are fractions?

*September 4, 2012*

**math**

show why 7.32(times)0.8 has the same number of digits behind the decimal in the answer as it has in the problem.

*September 4, 2012*

**math**

show why 4.25/0.7 is the same as 42.5/7

*September 4, 2012*

**math**

nevermind i got the answer (:

*September 4, 2012*

**math**

Write the following number in all three forms of expanded notation: -273.32

*September 4, 2012*

**math**

a baseball team has already played 37 games and won 21 games. The season has a total of 63 games. How many more games do they have to win to keepthe same winning percentage? (answer should be a whole number)

*August 27, 2012*

**math**

Bari has 180 Mardi Gras beads. 2/3 of the beads are green. 40% of the remaning beads are gold and the rest are purple. What fraction of the beads are gold? how many purple beads does she have?

*August 24, 2012*

**math**

Bennett put 4/7 of his paycheck in his checking account, kept 1/2 of the remainder in cash and put the rest in his savings account. What was bennett's salary?

*August 24, 2012*

**math**

Mary bought some peppers and apples at the farmer's market. 2/3 of the peppers and 3/4 of the apples were red. the number of red peppers and red apples were the same. if mary bought 27 peppers how many apples did dhe buy?

*August 22, 2012*

**math**

Bennett put 4/7 of his paycheck in his checking account, kept 1/2 of the remainder in cash and put the rest in his savings account. What was bennett's salary?

*August 22, 2012*

**math**

Bari has 180 Mardi Gras beads. 2/3 of the beads are green. 40% of the remaning beads are gold and the rest are purple. What fraction of the beads are gold? how many purple beads does she have?

*August 22, 2012*

**math**

Meggie has 2,784 stickers. 1/4 of them have glitter, 3/8 of them are felt and the rest are plain. How many of the stickers are felt? what fraction of the stickers are plain?

*August 22, 2012*

**math**

Stephen has 90 fish. He sold 1/2 of them and gave 1/3 of them to Cody. What faction of the fish was left? How many fish did he give Cody?

*August 22, 2012*

**Math**

Ticket sales for a recent weekend concert totaled $30000. If 300 more tickets were sold Saturday than in Firday and each ticket cost $25 how many tickets were sold on Saturday ?

*August 21, 2012*

**Math**

Ryan saved $55 more than Jim. Chris saved 6 times as much as Jim. Donna saved half as much as Chris. If the children saved $3245 altogether how much did each child save?

*August 21, 2012*

**math**

in a certain week, a salesman sold a used truck and seven 4-wheelers. the truck was sold for $12,000. If the truck cost 5 times as much as each 4-wheeler, what were his total sales for that week?

*August 20, 2012*

**math**

in the answer what does the "S" represent, i having a hard time understanding how you came up with the snswer

*August 20, 2012*

**math**

carrie, Sam and ester have a total of $570. Carrie has $80 more than sam and ester has 5 times as much as sam. How much does each of them have?

*August 20, 2012*

**math**

Terry, Dan and heidi have a total of $850. Dan has $120 more than Terry and Heidi has $190 more than Dan. How much money does heidi have?

*August 20, 2012*

**physics**

To protect her new two-wheeler, Iroda Bike buys a length of chain. She finds that its linear density is 0.61 lb/ft. If she wants to keep its weight below 1.8 lb, what length of chain is she allowed?

*May 28, 2012*

**NEED HELP...how do i draw a visual for this ques?**

A son and his father take a daily walk up a hill. It is 1.5 km to the top of the hill. As the father gets older he can only walk half the speed of his son. So they start together but the father trails his son. The father reaches the halfway point when the son is at the top. ...

*December 6, 2011*

**NEED HELP drawing a visual for this question**

Marnie collects red, blue and purple buttons. At the beginning of the year she has 360 buttons in a box. The ratio of red buttons to blue buttons is 4:3 and there are twice as many red buttons as purple buttons. a.What is the ratio of blue buttons to purple buttons at the ...

*December 6, 2011*

**Math...HELP i dont understand this problem!**

Given 1/3 Y÷1/2 X=4 Discuss its meaning. Create a shape for X and for Y that will make this true. Draw and label the shapes, then illustrate how the quotient was obtained. Your drawing must be neat and accurate. Can individual pieces of a traditional tangram be used to...

*December 5, 2011*

**math**

Given 1/3 Y÷1/2 X=4 Discuss its meaning. Create a shape for X and for Y that will make this true. Draw and label the shapes, then illustrate how the quotient was obtained. Your drawing must be neat and accurate. Can individual pieces of a traditional tangram be used to ...

*December 1, 2011*

**math**

Given 1/3 Y÷1/2 X=4 Discuss its meaning. Create a shape for X and for Y that will make this true. Draw and label the shapes, then illustrate how the quotient was obtained. Your drawing must be neat and accurate. Can individual pieces of a traditional tangram be used to ...

*December 1, 2011*

**logic**

thanks

*December 1, 2011*

**logic**

A son and his father take a daily walk up a hill. It is 1.5 km to the top of the hill. As the father gets older he can only walk half the speed of his son. So they start together but the father trails his son. The father reaches the halfway point when the son is at the top. ...

*December 1, 2011*

**math**

Marnie collects red, blue and purple buttons. At the beginning of the year she has 360 buttons in a box. The ratio of red buttons to blue buttons is 4:3 and there are twice as many red buttons as purple buttons. a.What is the ratio of blue buttons to purple buttons at the ...

*December 1, 2011*

**logic**

Given 1/3 Y÷1/2 X=4 Discuss its meaning. Create a shape for X and for Y that will make this true. Draw and label the shapes, then illustrate how the quotient was obtained. Your drawing must be neat and accurate. Can individual pieces of a traditional tangram be used to...

*December 1, 2011*

**math**

Three men (Tom, peter, and jack)and three women (Eliza, Anne, and Karen) are spending a few months at a hillside. They are to stay in a row of nine cottages, each one living in his or her owm cottage. There are no others staying in the same row of hoses.In addition, A. Anne, ...

*November 30, 2011*

**math**

You teach 40 students. Blue is a favorite color of 22 studetns; 19 own cars; 13 like flowers; blue is the favorite color of 10 students who own cars; blue is the favorite color of 7 students who like flowers' 8 own cars and flowers; and blue is the favorite color of 5 ...

*November 29, 2011*

**math**

Fresh Grapes contain 80 percent water by weight and 20 percent juice, whereas dried grapes contain 15 percent water by weight with the rest juice. How many punds of dried grapes are needed to yield the same amount of juice as 34 pounds of fresh grapes?

*November 28, 2011*

**math**

Three men (Tom, peter, and jack)and three women (Eliza, Anne, and Karen) are spending a few months at a hillside. They are to stay in a row of nine cottages, each one living in his or her owm cottage. There are no others staying in the same row of hoses.In addition, A. Anne, ...

*November 28, 2011*

**math**

You teach 40 students. Blue is a favorite color of 22 studetns; 19 own cars; 13 like flowers; blue is the favorite color of 10 students who own cars; blue is the favorite color of 7 students who like flowers' 8 own cars and flowers; and blue is the favorite color of 5 ...

*November 28, 2011*

**venn**

how to draw a venn diagram for: C is a subset of A; B and C have no elements in common

*November 14, 2011*

**venn**

Thanks Dr. Russ. I had these items drawen just didn't know if it was correct or not.

*November 14, 2011*

**venn**

how to draw a venn diagram for: A is a subset of B; C is a subset of B; A and C have no elements in common

*November 14, 2011*

**math**

For each of the following, draw a Venn diagram. (a) A º B, C º B, A ¿ C = ∅ (b) A » C, B ¿ C = ∅.

*November 14, 2011*

**Math**

A famous detective was called in to solve a baffling murder mystery. He determined there was only one cause of death along with the following facts: a.Mr. Harold, the murdered man, was killed by a blow on the head with a brass candlestick. b.Either his wife, Mrs. Harold, or a ...

*November 14, 2011*

**logic**

A famous detective was called in to solve a baffling murder mystery. He determined there was only one cause of death along with the following facts: a.Mr. Harold, the murdered man, was killed by a blow on the head with a brass candlestick. b.Either his wife, Mrs. Harold, or a ...

*November 11, 2011*

**Logic**

Lalph Rauren was famous for discovering potential models as he walked the streets of New York. One day he spotted four girls who later became top models: Amy, Mary, Kay, and Beth. One was discovered walking through an apartment building, one in a coffee shop, one in a shopping...

*November 11, 2011*

**math**

Thanks Steve!

*November 11, 2011*

**math**

Four good friends, who love cats, have each named their cat after one of the other friends. Of the clues that follow, only one is true; the others are false. Which friend owns which cat? a.Candy’s cat is named either Dody or Alice. b.Betsy’s cat is named Alice. c....

*November 11, 2011*

**math**

thanks for your help.

*November 10, 2011*

**math**

A floor-finishing machine uses bars of wax. Once the bar is worn down to 1/2 its original size, it must be replaced with a new bar. Only full-size bars can be put in the machine. The pieces are melted and recycled to make full-size bars. If you buy 24 bars and recycle all the ...

*November 10, 2011*

**Math**

(A) such that: A (subset) B; C (subset) B; A and C have no elements in common (B) such that: C (subset) A; B and C have no elements in common

*November 10, 2011*

**math**

is the answer $23.62??

*October 24, 2011*

**math**

when I multipied both sides by 5 and divided both sides by 3 I didn't get a x=? for a answer

*October 24, 2011*

**math**

thanks

*October 24, 2011*

**Finance**

Nancy Bellow promised her son she would pay him $600 a quarterly for four years.If Nancy can invest her money in a 6% ordinary annuity, how much would she need to invest today

*July 25, 2011*

**spelling**

I need a sentence with its, not it's.

*September 29, 2010*

**statistics**

a study found that the average time it took a person to find a new job was 130 days. If a sample of 36 job seekers was surveyed, find the 95% confidence interval of the mean. Assume the standard deviation of the sample is 12 days.

*March 19, 2010*

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