Monday

January 23, 2017
Total # Posts: 81

**Chemistry**

An isotope, X, of a particular element has an atomic number of 15 and a mass number of 31. Which of the following statements are true? I. X is an isotope of phosphorus. II. X has 16 neutrons per atom. III. X has an atomic mass of 30.973

*January 22, 2017*

**Math**

fill in the symbols including brackets to make this statement correct 8 2 4 3 = 42

*October 18, 2016*

**Math**

How must unit cubes be stacked when used to measure volume?

*April 12, 2016*

**physics**

A 600 kg car is moving on a level road at 30 m/s. How large of a braking force is needed to stop it in a distance of 75m?

*December 8, 2014*

**physics**

What is the gravitational acceleration on a planet where a 2.0 kg mass has a weight of 16 N on the planet`s surface?

*December 7, 2014*

**math**

what is 5t+12f-t-3f=

*November 4, 2014*

**optimization**

A farmer wants to make 9 identical rectangular enclosures as shown in the diagram below. If he has 720 feet of fencing materials, what should the dimensions of each enclosure be if the total area is to be maximized?

*March 8, 2014*

**physics**

A 91 kg student eats a 200 Calorie doughnut. To “burn it off”, he decides to climb the steps of a tall building. (1 food Calorie = 10^3 Calories.) How high would he have to climb to expend an equivalent amount of work? The acceleration of gravity is 9.8 m/s2

*January 15, 2014*

**physics**

The pressure in each of your car tires is 2.10 105 Pa. The mass of your car is 1660 kg. Assuming that each of your tires bears one-quarter of the total load, what is the contact area of each tire with the road?

*October 28, 2013*

**consumer math**

Number four is actually D

*September 17, 2013*

**math**

if 7x=4y, and y/z=7/5 , then x/z=

*September 14, 2013*

**Physics**

I am new at physics and having a very hard time. Could you please help. Thank you. Show that the water pressure at the bottom of the 50-m-high water tower in Figure 5.3 is 490,000 N/m2, or is approximately 500 kPa.

*August 10, 2013*

**Calculus**

Rewrite the expression ^2ãã(64x^2)in the form of nx^r Where n=? Where r=?

*May 24, 2013*

**Chemistry**

Solve an equilibrium problem (using an ICE table) to calculate the of each of the following solutions. .16M CH3NH3Cl

*March 30, 2013*

**accounting**

Salt River Copmany is evaluating a capital expenditure propsal that has the following predicted cash flows: Intial investment $(43,270) Operation Year 1 20,000 Year 2 30,000 Year 3 10,000 Salvage 0 a. Using a discount rate of 14 percent, determine the net present value of the ...

*September 21, 2012*

**accounting**

Salt River Copmany is evaluating a capital expenditure propsal that has the following predicted cash flows: Intial investment $(43,270) Operation Year 1 20,000 Year 2 30,000 Year 3 10,000 Salvage 0 a. Using a discount rate of 14 percent, determine the net present value of the ...

*September 21, 2012*

**health**

me 5th haha

*August 11, 2012*

**Geometry**

In Euclidean geometry, the sum of the measures of the interior anglesof a pentagon is 540o. Predict how the sum of the measures of the interior angles of a pentagon would be different in spherical geometry.

*June 22, 2012*

**math**

If a trend line had the equationy=x+9 what y value would you expect bto obtain when x is 20

*March 6, 2012*

**math**

Thanks bob!!!

*March 6, 2012*

**trig**

tan theta= square root of 3 / 3 if o degrees is less than or equal to theta less than o equal to 360

*February 6, 2012*

**math**

3 adult tickets

*January 31, 2012*

**probability**

normally distributed with a mean of 40 minutes and a standard deviation of 5 minutes. What is the probability that it will take more than 40 minutes? Answer

*January 24, 2012*

**Physics**

A "rocket car" is launched along a long straight track at = 0 . It moves with constant acceleration = 1.7 . At = 2.2 , a second car is launched with constant acceleration = 8.7 .

*October 19, 2011*

**maths/physics**

13.8

*August 17, 2011*

**Algebra 1**

Can you show the steps and explain how to solve 8-(x-2)

*April 4, 2011*

**English**

okay.. can you answers more question about it.

*February 6, 2011*

**English**

well i do understand the essay. its just that i am not able to write an evaluation on it. i need help with it. i mean if you had to write it, how will you write an evaluation on it. and we have to use third person in it

*February 6, 2011*

**English**

well we are supposed to make analytical judgments and defend them and give the essay's significance also here are some questions we have to also look at while evaluating it • What are your reactions to the work? What in the work are you responding to? • How sound...

*February 6, 2011*

**English**

Can anybody help in evaluating this essay. i have to write an evaluation on it its by Wole Soyinka called Every Dictator's Nightmare With the blood-soaked banner of religious fanaticism billowing across the skies as one prominent legacy of this millennium, Martin Luther&#...

*February 6, 2011*

**English**

okay but can you help me with how am i suppose evaluate this essay. I mean i understand what the author is saying but i cant seem to write it.. any help with the evaluating it

*February 6, 2011*

**English**

I have to evaluate this essay.Can someone help me with this. how to evaluate this. some points on evaluating it. The essay is "Every dictator's Nightmare" by Wole Soyinka. thanks With the blood-soaked banner of religious fanaticism billowing across the skies as ...

*February 6, 2011*

**physics**

Three masses are arranged on a flat surface as shown. Two of the masses are as follows: m2 = 16.3 kg and m3 = 66.5 kg. A horizontal force of 519 N applied to m2 accelerates the masses across the floor, which has a coefficient of friction of μ = 0.312, at 1.77 m/s2. What ...

*December 5, 2010*

**physics**

A river flows due east at 1.91m/s.A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 10.3m/s due north relative to the water. A.What is the velocity of the boat relative to shore? How far downstream has the boat moved by the ...

*October 4, 2010*

**chemistry**

Given the reaction: C3H8(g) + 5O2(g) ¨ 3CO2(g) + 4H2O(g) What is the total volume of H2O(g) formed when 8.00 liters of C3H8(g) is completely oxidized?

*July 14, 2010*

**chemistry**

Given the balanced equation: C2H4 + 3O2 ¨ 2CO2 + 2H2O How many liters of CO2 are produced when 15 liters of O2 are consumed?

*July 13, 2010*

**chemistry**

In the reaction Fe2O3 + 3CO ¨ 2Fe + 3CO2 How much CO is used to produce 112 grams of iron?

*July 13, 2010*

**college**

In the reaction Fe2O3 + 3CO ¨ 2Fe + 3CO2 How much CO is used to produce 112 grams of iron?

*July 12, 2010*

**Science**

D. _____ has wavelengths between 0.7 and 0.4 millionths of a meter. D1. What you see as different colors are electromagnetic waves of different ______. D2. Red ligh has the _____ wavelengths (lowest frequency); blue light has the _____ wavelengths (highest frequency). E. ...

*January 1, 2010*

**Science**

Thanks!

*January 1, 2010*

**Science**

My little brother needs help on this worksheet. And I have no clue. 1. For waves that travel with the same speed, wavelengths increases as frequency ______. 2. Radiant energy decreases as _________ increases. B1b. The radio waves from the ________ antenna can cause electrons ...

*January 1, 2010*

**9th grade algebra**

i keep getting -2/3 but when i plug it back to the original equation it wont work out right for me

*December 9, 2009*

**9th grade algebra**

what is the answer to: 6(6g-2)+8(1-5g)=2g

*December 9, 2009*

**maths**

youd be facing east know matter what direction you turned

*December 9, 2009*

**maths!**

the fractions don't add to 100%

*December 9, 2009*

**Maths**

what is the answer to this problem 6(6g-2)+8(1-5g)=2g

*November 30, 2009*

**5th grade science**

how do animals depend on each other

*January 27, 2009*

**social studies**

What type of government does Japan have? Also I need the govt. types for Iran before 1900 and after 1979. Thanks.

*August 21, 2008*

**social studies**

What kind of Government did venezuela have 1850-1935?

*August 21, 2008*

**geography/history**

who discovered the arctic circle

*May 24, 2008*

**math riddle ALGEBRA WITH PIZZAZZ**

epic failure. cheaters like me...

*April 6, 2008*

**math**

the sum of the digits of a two digit number is 9. if the digits are reversed, the new number if 63 grater than the original number. what is the original number?

*March 5, 2008*

**algebra 1b**

Solve each system using substitution. check your solution. a = 2/3b -3 a = 2b - 18 c = 3d -27 4d + 10c = 120

*January 24, 2008*

**Algerbra 1B**

Solve Each Sysem Using Substitution. Check ach solution. a = 2/5b -3 a = 2b - 18 c = 3d - 27 4d + 10c = 120 Thanks, hope someone helps

*January 24, 2008*

**Algerbra 1B**

Solve Each Sysem Using Substitution. Check ach solution. a = 2/5b -3 a = 2b - 18 c = 3d - 27 4d + 10c = 120 Thanks, hope someone helps

*January 24, 2008*

**algebra**

y=1/2x+1, and y=-3x+8 thanks

*January 23, 2008*

**algebra**

can some one help me with 2 problems thanks. y=1/2x+1,y=-3x+8, and y=1/2x+2, y=-x+5. show the work maybe i can figure it out some how.

*January 23, 2008*

**Algerbra**

At a large nursery, a border for a rectangular garden is being built. Designers want the border's length to be 5 ft greater than its width. A maximum of 180 ft of fencing is available for the border. Write and solve an inequality that describes possible widths of the ...

*October 23, 2007*

**algebra**

write an inequality. graph it. the freezer temperature is to be kept between 15 farenhight and 25 farenheight, inclusive. thanks

*October 23, 2007*

**algebra**

write an inequality. graph the solution. a hamster weighs less than 10 ounces. thanks

*October 23, 2007*

**algebra**

Solve each inequality. Graph the solution 5 - x ¡Ý 9 or 3x - 4 > 8

*October 23, 2007*

**algebra**

solve each inequality. Graph the solution. 4 < 3x - 5 ¡Ü 7 5 - x ¡Ý 9 or 3x - 4 > 8

*October 23, 2007*

**math**

write an inequality that represents each situation. Graph the solution 4x + 6 ¡Ý 34.

*October 23, 2007*

**math**

Write an inequality that represents each situation. graph the solution. Help appreaciated Thanks. 4x + 6 ¡Ý 34.

*October 23, 2007*

**math**

write an inequality that represnts this sentence, graph the solution. A hamster weighs less than 10 ounces. thanks

*October 23, 2007*

**Science**

What would be the definition of the word science through a 7th graders eyes?

*September 4, 2007*

**algerbra 1**

Define a variable and write an algebraic expression for each phrase. the diffrence of 8 and a number the product of 2 and a number

*August 23, 2007*

**science**

FeS+HC1--->FeC1(2)+H(2)S. what is the balanced equation thanks. Wouldnt you need a coefficent of two in front of HCl? the balanced equation would result like this: FeS+2HCl-->FeCl2+H2S therefore, each side is equal Fe- 1 S- 1 H- 2 Cl-2

*May 9, 2007*

**Physics**

d) 58 you said find the angle that is double sin25 (not sin50) so 2 x sin 25 gets you .84523 find what angle that is using inverse sin sin^-1 (.84523) = 57.697

*May 8, 2007*

**math**

cards numbered 0 through 9 are in a bag. what is the probability you pull a card with a number greater than 7? i think it is 2/9. thanks. 0 through 9 There are 10 cards.

*April 18, 2007*

**math**

you flip a coin twice. what is the probility you get no heads? thanks. i think it is 1/4.is this right. 2/4 2/4 sooorrrrrrrrrrrrrrrrrrrrrrrrry but you are wrong i think well can you help me on my questions' yes, 1/4 is correct.

*April 17, 2007*

**math**

of a set of 10 cards, 3 have red circles, 4 have yellow triangles, and 3 have green diamonds. you choose one card at random and then replace it. then you choose a second card. what is the probability that both cards have yellow triangles? Find the probability of obtaining the ...

*April 16, 2007*

**math**

a bag contains 33 green marbles and 25 blue marbles. you select a marble at random from the bag. find the theoretical probability of selecting a blue marble. thanks Pr(blue)= number blue/total marbles

*April 13, 2007*

**experimental probability**

you spin a spinner 50 times. it lands on red 8 times, yellow 12 times, green 20 times, and blue 10 times. based on the results, what is the experimental probility of its landing on green or yellow? thanks I will be happy to critique your work on this. i have a different ...

*April 13, 2007*

**math**

you roll a number cube. what are the odds in favor of rolling a 1 or a 5?thanks. There are 6 sides of a cube. You want one of 2 numbers to show up. So it's 2/6 chance....or 1/3 Matt I assume that you are talking about a die (Singular for "dice"), it has a total ...

*April 13, 2007*

**combinations help**

a menu has a list of seven appetizers. your party will choose three. which of the following represents the number of possible choices? 7/3!, 7c3,or 7!-3!. 7 appetizers, choose 3. Clearly the answer is 7 choose 3.

*April 11, 2007*

**math**

in volleyball, you can volley, set, or spike.how many ways can your team make two plays? use tree diagram. thanks Draw three "branches" for the first play, then three branches from each of them for the second "play" for a total of nine. However, two ...

*April 10, 2007*

**counting outcomes**

in volleyball, you can volley, set, or spike. how many ways can your team make two plays? use tree diagram. thanks. a tree diagram would show 9 possible outcomes how to you do and count outcomes

*April 9, 2007*

**permutations in math**

suppose 15 countries compete in an olympic event. gold, and silver,and bronze medals are awarded. how many different arrangements of winners are there if no country wins more than one medal in this event? show the work. thanks. 15 countries can get the gold 14 countries can ...

*April 9, 2007*

**Calculus, AntiDerivatives**

The car is travelling 43ft/sec and decelerating at 5ft/s so we can assume it takes 43/5 seconds to stop. The car is slowing down constantly so the average speed of the car can be determined by 43/2 and then multiplying by the time it takes to stop the car we can find how many ...

*November 23, 2006*

**math**

how can you figure out how to do a fractal triangle. how do you figure out how write the expression? Since this is not my area of expertise, I searched Google under the key words "fractal triangle" to get these possible sources: http://serendip.brynmawr.edu/...

*August 30, 2006*

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