Friday

September 30, 2016
Total # Posts: 1,597

**Physics**

A particle moves in a straight line so that its position (x cm) from a fixed point O at time (t seconds) is given by x= t^3-6t^2-15t-5 Find the average speed of the particle in the first 7 seconds

*September 8, 2012*

**calc**

got it, thanks!

*September 4, 2012*

**calc**

Suppose that f(x) = 1/x. Find a simplified expression for f(x)-f(a)/x-a

*September 4, 2012*

**precalc review/calc**

Thanks! So because the smallest and biggest numbers +/- 3 and the middle number 0 result in the smallest and largest y values, 1 and 8 respectively, the range is therefore [1, 8]. That makes sense. :D

*September 3, 2012*

**precalc review/calc **

For the curve y=2^[sqrt(9-x2)], find the range of the function. I think the range is [0,8] but I don't know why. Could you show me how to get to that answer? Thanks.

*September 3, 2012*

**Chemistry**

A piece of metal weighing 20.32 grams is added to a flask with a volume of 24.5 cm3. It is found that 18.52 grams of water must be added to the metal to fill the flask. What is the density of the metal?

*September 3, 2012*

**process control**

Average power (btu/s) needed for a process that heats water at 40 lbm/min from 20F to 150F. Can you just tell me generally how to solve a problem like this. The numbers do not really matter, I just need to practice problems. Thanks.

*August 26, 2012*

**Communication**

Any. :) I need a theory that supports how and why Twitter is being used as a prime source for real time news. I thought of comparing it with the newspaper and facebook.

*August 26, 2012*

**Communication**

Hello! I need help with my research regarding-- Twitter being used as a prime source for real time news. Can anyone suggest a communication theory I can use for this study? I was thinking about using the agenda-setting theory, but I need another theory aside from that. :)

*August 26, 2012*

**Physics **

A fire hose can project water at a rate of 6.00x10^2 litres per minute to a height of 40.0m. Find: a) the velocity with which the water leaves the tube b) the kinetic energy of the water as it leaves the hose c) the kinetic energy of the water at 40.0m.

*August 26, 2012*

**geometry**

In Geometry how do I calculate the precion of 14 meters?

*August 21, 2012*

**algebra1**

tripling the greater of two consecutive even integers gives the same result as subtracting 10 from the lesser even integer.what are the integers?

*August 20, 2012*

**calculus**

suppose you invest some money in an account at 6% compounded monthly, after four years you have $8000, how much interest did you earn

*July 20, 2012*

**geometry**

A woman who is 6-ft tall casts a 4.5-foot shadow at the same time that a building casts a 75-foot shadow. What is the height of the building in feet?

*July 19, 2012*

**math**

Issa IS driving to the airport to catch a flight to Miami, and Her arrival depends on traffic. If the traffic is light, then she can drive 60 mph and arrive at the airport 1 hour early. If traffic is heavy, she can drive 35 mph and arrive at the airport on time. The equation ...

*July 18, 2012*

**marketing**

Using the broad definition of a product, identify and explain what products are being offered by a shop that specializes in bicycles; by a travel agent; by a supermarket; and, by a new car dealer

*July 15, 2012*

**marketing**

How might you use different types of research (focus groups, observation, survey, and experiment) to forecast market reaction to a new kind of disposable baby diaper?

*July 15, 2012*

**Math**

Issa is driving to the airport to catch a flight to Miami, and her arrival depends on traffic. If the traffic is light, then she can drive 60 mph and arrive at the airport 1 hour early. If traffic is heavy, she can drive 35 mph and arrive at the airport on time. The equation ...

*July 10, 2012*

**Science**

science is the mixture ilearneed the science on the time she give my on fast day me is go for the killer and gave my juck on wag friends like the opportunity go as the preaper good life and good shade

*July 6, 2012*

**Science**

science is the mixture ilearneed the science on the time she give my on fast day me is go for the killer and gave my juck on wag friends like the opportunity go as the preaper good life and good shade

*July 6, 2012*

**Math**

Of households in the United States, 18 million, or 16%, have three or more vehicles, as stated in USA Today (June 12, 2002), quoting the Census Bureau as the source. (a) If two U.S. households are randomly selected, find the probability that both will have three or more ...

*July 4, 2012*

**Statistics/Math**

U.S. Interstate 64 runs between Portsmouth, VA, at I-264 on the eastern end to St. Louis, MO, at I-270 on the western end. While passing through six states and five more major cities, I-64 intersects nine more interstate highways. The number of miles in each state is as ...

*July 4, 2012*

**Statistics**

Thank you, I answered this one already. :)

*July 4, 2012*

**Statistics**

How would you interpret the findings of a correlation study that reported a linear correlation coefficient of +0.3?

*July 4, 2012*

**chemistry**

the book rounds the answer to 4.2 so either is fine. how do i go from here to solve for the amount of time? if you could please show a step by step process id really appreciate it!

*June 18, 2012*

**chemistry**

i get 4.207 g Cu

*June 18, 2012*

**chemistry**

suppose 250 mL of a .433 M solution of CuCl2 is electrolyzed. how long will a current of 75A have to run in order to reduce the concentration of Cu2+ to .167M? What mass of Cu will be deposited on the cathode during this time?

*June 18, 2012*

**Chemistry**

Ammonia, NH3, is a stronger ligand than Cl- but weaker than CN-. Complete the balanced equations for the reactions that are predicted to occur. CoCl6^3- (aq) + CN- (aq) ---> Co(NH3)6^3+ (aq) + Cl- (aq) ---> Co(CN)6^3- (aq) + NH3 (aq) --->

*June 13, 2012*

**Math**

Please round the number 43,678.426785 to the nearest ten thousand

*June 12, 2012*

**U.S. GOVERNMENT**

1.False 2.False 3.True 4.True

*June 8, 2012*

**math**

4. Gregory teaches martial arts. He charges a one-time processing fee of $5.00 and the cost of the classes is shown below. Let x represent the number of classes and y represent the cost of classes. Based on this information, what will it cost to take 10 classes? Cost of ...

*June 7, 2012*

**U.S. GOVERNMENT**

1. True 2. True 3. False 4. True

*June 5, 2012*

**Math**

What is the length of a segment whose endpoints are (5, -8) and (9,2). Please explain to me what the formula or rules for working this problem.

*June 5, 2012*

**Math**

Simplify x^2 - 9x + 18/ x^2 - 6x + 9 for all values of x for which the expression is defined. A. x-3/x-6 B. x-6/x-3 C. x-1/x+9 D. x+9/x-1 Please explain how you work this problem in detail. Thanks.

*June 4, 2012*

**math**

Marna wants to find the values of x for which the funciton below will have a value of 10. f(x) = x^2 + x - 20. Which of the following shows the correct factorization of this funciton for f(x) = 10. A. (x + 5) (x + 4) = 10 B. (x - 5) (x - 4) = 10 C. (x + 6) (x - 5) = 0 D. (x + ...

*June 4, 2012*

**Math**

Vanessa has 17 quarters, 8 dimes, 15 pennies, and 14 nickels in a piggy bank. Which of the following measures of central tendency will change if she spends 4 quarters to get a soft drink? Mean, median, mod, or none will change? Why?

*June 3, 2012*

**Alg I**

One type of decorative ribbon regularly costs $3.59 per yard. When the ribbon is on sale, it cost $2.19 per yard. Which is the closest to the difference in the cost per inch for the ribbon when it on sale compared to its regular price? A. 1.9 cents per inch B. 3.8 cents per ...

*June 3, 2012*

**Alg I**

Please explain how to solve: Laura can pressure wash her driveway at an average rate of 15 square feet per minute. Which is closest to this rate in square yards per second? A. 0.35 B. 0.24 C. 0.03 D. 0.01

*June 3, 2012*

**Finance**

Firm A has $20,000 in assets entirely financed with equity. Firm B also has $20,000 in assets, financed by $10,000 in debt (with a 10 percent rate of interest) and $10,000 in equity. Both firms sell 30,000 units at a sale price of $4.00 per unit. The variable costs of ...

*May 29, 2012*

**medicinal chemistry**

the solubility product of PbSO4 at 298K is 1.6x10^-8 mol^2dm^-6. Calculate the solubility of PbSO4 in 0.10mol dm^-3 sulphuric acid.Thanks!

*May 28, 2012*

**medicinal chemistry**

the solubility product of PbSO4 at 298K is 1.6x10^-8 mol^2dm^-6. Calculate the solubility of PbSO4 in pure water

*May 28, 2012*

**3 grade math ms sue**

5/8

*May 23, 2012*

**writing**

i need synonyms, antonyms, and sentences that use the following words please: illusion consecutive horizon thank you so much!

*May 21, 2012*

**writing**

what are some antonyms and synonyms for the words: illusion (noun) horizon (noun) consecutive (adjective) debut (noun) gross (adjective) monastery (noun) thank you!

*May 21, 2012*

**Chemistry**

Arrange the ions: Cu^2+, Ni^2+, Mg^2+, & Zn^2+ in order of decreasing ability to be reduced... & in order of decreasing ability to be oxidized

*May 20, 2012*

**math**

what is the answer to did you hear about... on worksheet page 106

*May 15, 2012*

**Health**

Can you please check these sentences? Thank you, Writeaacher! 1) You must be respectful of your classmates and of your teachers. You should stand up when teachers (or your teachers?) enter the classroom. 2) You mustn't drink or eat during lessons but you can do it during ...

*May 15, 2012*

**Health**

Writeacher, could you please check if these statements on school rules (and the alternatives) in brackets are possible. Thank you 1) You must have your report card every time (correction: always with you) You must wear your tracksuit if you have PE. 2) You must park your ...

*May 15, 2012*

**math (2nd Try)**

You have 6 cups of sugar. It takes 1 cup of sugar to make 24 cookies. The function c(s) = 24s represents the number of cookies, c, that can be made with s cups of sugar. What domain and range are reasonable for the function? These are my options: domain: 1<s<6 Range: 24&...

*May 11, 2012*

**math**

A ball is kicked from ground level into the air. Its height y, in feet, after x seconds can be represented by the equation y = 40x -16x^2. What is the total elapsed time, in seconds, from the time the ball is kicked until it reaches grond level again? Is the answer - 25 s

*May 11, 2012*

**math**

An olympic swimmer is having his laps timed during practice. To be aware of his progress, the results are shown as order pairs (l, t) below: (1,19), (2,38), (3,57) (4,76). Which equation represents t, the time in seconds, as a function of l the number of laps that the swimmer ...

*May 10, 2012*

**Math**

You have 6 cups of sugar. It takes 1 cup of sugar to make 24 cookies. The function c(s) = 24s represents the number of cookies, c, that can be made with s cups of sugar. What domain and range are reasonable for the function? These are my options: domain: 1<s<6 Range: 24&...

*May 10, 2012*

**math**

Thank you so much for explaining it so well.

*May 10, 2012*

**math**

The out-of-pocket costs to an employee for dental insurance and dental expenses for one year are as follows: Premium, $4000; Deductible, $300; Co-payment, 17% (after the first $300 the employee has to pay). According to the plan outlined, total annual dental care costs, c, ...

*May 10, 2012*

**math**

The value of a $20,000 car decreases every year, t. The equation below models this situation. 20000(1 - 0.04t) = 13,000 After how many years will the car be worth $13,000? Round to the nearest tenth if necessary. I was instructed that the answer is t = 8.75. How do I set it up...

*May 7, 2012*

**Biology**

In pea plants the colour of the peas is genetically controlled. Each pea represents a separate fertilisation. Smooth texture (S) is dominant to wrinkly (s) and green (G) colour is dominant to yellow (g). Following a breeding experiment with pea plants, the following ratio of ...

*May 2, 2012*

**Chemistry**

equivalence point

*April 29, 2012*

**Chemistry**

This volume of base and its corresponding pH is known as the______

*April 29, 2012*

**Life Orientation**

Ways in which Air pollution impact on the community

*April 29, 2012*

**Health, Safety ,and Nutrition**

sorry I'm working in the dark with a keyboard thats broken, but thats no excuse thanks for the reminder. I think it is flexability.

*April 28, 2012*

**Health, Safety ,and Nutrition**

A childs ability to jumpfor distance is an example of Agility or Flexability

*April 28, 2012*

**Health, Safety ,and Nutrition**

thank you Ms. Sue

*April 28, 2012*

**Health, Safety ,and Nutrition**

Which is a suitable toy for a toddler ? A a riding toy or B a walker I think it is A.

*April 28, 2012*

**Saftey, and Nutrition**

oops

*April 28, 2012*

**Saftey, and Nutrition**

B physcal is correct

*April 28, 2012*

**Saftey, and Nutrition**

A child who struggles to climb into a chair is confronting what kind of hazzard? B physcal or D enviromental

*April 28, 2012*

**Health, Safety ,and Nutrition**

Well its either C or D but my guess is the ceramic because we cook with stainless steel

*April 28, 2012*

**Health, Safety ,and Nutrition**

im not sure i cant find it in the text

*April 28, 2012*

**Health, Safety ,and Nutrition**

I dont think its A because we use styrofoam daily at work......

*April 28, 2012*

**Health, Safety ,and Nutrition**

children should not be served drinks in containers made of A. styrofoam B. uninsulated paper C. treated ceramic D. stainless steal

*April 28, 2012*

**Health, Safety, and Nutrition**

It s not A

*April 28, 2012*

**Health, Safety, and Nutrition**

A child who hasnt learned prerequisite fundamentals needed for a combination of motor patterns is suffering from A anxiety B poor mscle control C proficiency barrier D nonacquisition barrier

*April 28, 2012*

**child developement**

Is a correct?

*April 28, 2012*

**child developement**

A child throws a ball with speed and accuracy when he throws a ball to his teacher but his throws are slower and less accurate when plays with a group of friends. This difference is explained by A. classical stage theory B. probility theory C. locomotion-x theory D, Piaget,s ...

*April 28, 2012*

**child development**

A child who hasnt learned the prequisite fundamentals needed for a combition of motor paterns is suffering from A. anxiety B. poor muscle control C. proficiency barrier D.nonacquisition barrier

*April 28, 2012*

**Physics**

thanks!!!

*April 28, 2012*

**Physics**

Several volcanoes have been observed erupting on the surface of one of Jupiter's closest moons. Suppose that material ejected from one of these volcanoes reaches a height of 4.96 km after being projected straight upward with an initial speed of 132 m/s. Given that the ...

*April 28, 2012*

**math**

There are two answers to chose from: A: 16.95 B: 79.05 Which is horizontal?

*April 26, 2012*

**math**

Landon is standing in a hole that is 6.7 ft deep. He throws a rock and it goes up into the air, out of the hole, and then lands on the ground above. the path of the rock can be modeled by the equation y= -0.005x^2 + 0.48x - 6.7, where x is the horizontal distance of the rock, ...

*April 26, 2012*

**math - Help**

The value of a $20,000 car decreases every year, t. The equation below model this situation. 20,000(1-0.04t) = 13,000 How many years will the car be worth $13,000? Round to the nearest tenth if necessary. I got 20,000(.96t)= 13,000, but I don't believe gives me the correct...

*April 23, 2012*

**math - Additional Info**

The value of a $20,000 car decreases every, t. The equation below model this situation. 20,000(1-0.04t) = 13,000 How many years will the car be worth $13,000? Round to the nearest tenth if necessary. I got 20,000(.96t)= 13,000, but I don't believe gives me the correct ...

*April 22, 2012*

**math**

You have 6 cups of sugar. It takes 1 cup of sugar to make 24 cookies. The function c(s) = 24s represents the number of cookies, c, that can be made with s cups of sugar. What domain and range is reasonable for the function?

*April 21, 2012*

**math**

I understand most of the explanation except the part below: n log .96 = log .65 n = -.187/-.0177 Could you please explain? Thanks

*April 21, 2012*

**math**

The value of a $20,000 car decreases every, t. The equation below model this situation. 20,000(1-0.04t) = 13,000 How many years will the car be worth $13,000? Round to the nearest tenth if necessary. I got 20,000(.96t)= 13,000, but I don't believe gives me the correct ...

*April 21, 2012*

**math**

You are planting a rectangular garden. It is 5 ft longer than 3 times its width. The area of the garden is 250 ft^2. Find the dimensions of the garden. I set it up like this: 3x +5 = 250 where x=8l.7. Is this correct so far, if so what do I do next? Thanks

*April 21, 2012*

**math**

The length of an open-top box is 4 cm longer than its width. The box was made from a 480-cm^2 rectangular sheet of material with 6cm by 6cm squares cut from each corner. The height of the box is 6cm. Find the dimensions of the box. Please show me in detail how to set this up ...

*April 21, 2012*

**Geometry**

What is the volume of a horizontal cylinder whose radius is 2.6 yd,and length is 8.4 yds to the nearest tenth of a cubic yard using 3.14?

*April 20, 2012*

**math**

Answer by factoring a quadratic equation. The length of an open-top box is 4 cm longer than its width. The box was made from a 480-cm^2 rectangular sheet of material with 6cm by 6cm squares cut from each corner. The height of the box is 6cm. Find the dimensions of the box. ...

*April 18, 2012*

**Math - 2nd try**

Please show me how to set up and solve: You have 6 cups of sugar. It takes 1 cup of sugar to make 24 cookies. The function c(s) = 24s represents the number of cookies, c, that can be made with s cups of sugar. What domain and range is reasonable for the function? math - ...

*April 18, 2012*

**math**

The value of a $20,000 car decreases every year, t. the equation below models this sitution: 20000(1 - 0.04t) = 13,000. Please explain how to work this problem.

*April 18, 2012*

**math**

What domain and range is reasonable for this function?

*April 18, 2012*

**Geometry**

How do I find the perimeter of the rectangle (l=10.6in and h=6.1 in

*April 16, 2012*

**Math**

Solve for x in the following proportion x/60= 9/5

*April 15, 2012*

**Math**

1/14 + 3/16 + 4/14

*April 14, 2012*

**Math**

If you are in a hot-air balloon at a height of 100 meters, you can expect to see ____ km. Round your answer to the nearest kilometer and enter only the number.

*April 13, 2012*

**math**

You have 6 cups of sugar. It takes 1 cup of sugar to make 24 cookies. The function c(s) = 24s represents the number of cookies, c, that can be made with s cups of sugar. What domain and range are reasonable for the function? (I know that you get 144 cookies from 6 cups of ...

*April 13, 2012*

**math**

What is the solution to the proportion shown below? (x+3)/4 = (x+2)/3

*April 12, 2012*

**math**

What is the solution to the proportion shown below? (x+3)/4 = (x+2)/3

*April 12, 2012*

**Math**

You have 6 cups of sugar. It takes 1 cup of sugar to make 24 cookies. The function c(s) = 24s represents the number of cookies, c, that can be made with s cups of sugar. What domain and range are reasonable for the function? (I know that you get 144 cookies from 6 cups of ...

*April 12, 2012*

**Math**

What is the solution to the proportion shown below? (x+3)/4 = (x+2)/3

*April 12, 2012*