Saturday

October 22, 2016
Total # Posts: 1,913

**Science**

suppose a skydiver (mass = 75 kg) is falling toward the earth. when the skydiver is 100 m above the earth he is moving at 60 m/s. at this point calculate the skydiver's

*October 22, 2016*

**math**

A model car travels horizontally after being released. The car travels a distaance d metres in a time of t seconds. d is directly proportional to t. The car travels 20 metres in a time of 2 seconds. A.Calculate the distance the car travels in 3 seconds.

*October 22, 2016*

**system development**

how to write a pseudocode for a system that allows user to create an account with features such as username, password, email, first name, surname, postal address

*October 2, 2016*

**physic**

The brakes on a car permit it to decelerate at the rate of 0.80 m/s2. How much distance is required to stop this car when it is traveling at 60.0 km/hr?

*September 25, 2016*

**Physics**

An airplane, traveling 142.5 km/hr at the moment it touches the runway, runs off the end of the runway still traveling at 36.7 km/hr. If the plane’s rate of deceleration was -1.6 m/s2, how long and how far did the plane travel along the runway?

*September 25, 2016*

**Physics**

A deer runs into the road 1.24 km in front of a car. The driver, traveling at 70.5 km/hr, sees the deer and slams on the brakes which decelerates the car at a rate of 3.2 x 10-1 m/s2. Will the driver hit the deer?

*September 25, 2016*

**math**

mike reads thrice as fast as judy.the ratio of the number of words judy can read per minute to the number of words paul can read per minute is 5:2 if paul can read 140 words per minute,how many words per minute can mike read

*September 13, 2016*

**math**

John saved 8/5 of what Mary saved. Idf Mar saved P 390 lessthan what John saved, how much did both of them saved?

*September 13, 2016*

**math**

Martin had red toy cars and blue cars in a box. the ratio of the blue toy cars to the red toy cars is 5:2. When Martin put 15 more blue toy cars in the box, the ratio of the blue toy cars to the red toy cars became 4:1. How many red toy cars and blue toy cars are now in the box?

*September 13, 2016*

**Math**

81,000! Thank you so much.

*August 13, 2016*

**Math **

The scale drawing of a soccer field mis 1 inch= 10 yards. The drawing of a soccer field is 12 inches by 7.5 inches. Find the dimensions of the actual soccer field in square feet.

*August 13, 2016*

**algebra**

michelle inherited 5/8 of his father's estate. He sold 2/5 of his share. What part of the entire estate did he sell?

*August 3, 2016*

**Math**

how to solve this po? 4(4x)^2 + 2(4x) + 5 I hope you can answer this for me. and thank you very much. :)

*July 29, 2016*

**Spanish**

?Crees que en el futureo___viajar a otros planetas? !Claro que si!

*July 18, 2016*

**Reserach Statistics in CRJU**

A data set has n=10 pairs of X and Y values. This data has SSx=10, SSy= 20 and SP=10. Compute the Pearson correlation and explain r=sp/√ssx ssy = 10/√10*20= 10/√200 Simplify 200 under radical= 200 as 10^2⋅2. √(〖10〗^2 )×2= 10/...

*June 30, 2016*

**math**

Hey are you able to email me I have a question for you please

*June 28, 2016*

**Questions **

Manny is there a way we can speak thur email I have a question about your post.

*June 20, 2016*

**Child **

Which one of the following activities is not directly connected with providing a safe and healthy environment?

*June 16, 2016*

**Algebra**

nicole is a jewellery designer. she handcrafts all the jewellery she sells online. with every successful sale, she would make a profit of $30; however, if she makes a mistake during the process, she will lose $10. Nicole is starting work on her next batch of 20 jewellery. ...

*June 15, 2016*

**Math**

If a missile is launched from a station 300 metres above sea level with an initial velocity of 500 m/s what is the height of the missile after 4 seconds

*June 12, 2016*

**english**

EDIT: You can't use non creative , but you can say uncreative

*May 26, 2016*

**english**

Yes, but it's better to use "unimaginative" instead of just adding "non" in front of a word to make it an antonym of the original word.

*May 26, 2016*

**Math**

A cross-section of a sphere, which is 6 units from the center of the sphere, has a circumference of 8π units. Find the surface area of the sphere.

*May 26, 2016*

**Math**

Find the number of vertices in a polyhedron if it contains 20 triangular faces and 12 pentagonal faces. a. 30 b. 32 c. 60 d. 120 * Also please show me how you got your answer, thanks

*May 26, 2016*

**Math**

The surface area of a right cone is 55π cm squared. Find the radius if the slant height is 6cm.

*May 23, 2016*

**Math**

how many electrones of each element are produced in this reaction? PbS +H2O -----PbSO4+H2O

*May 19, 2016*

**math **

this exponential equation has different base,but same exponent. 4^× -9(2^×)=-20 i know the 4 is just 2squared, but i am just a little confounded when taking it into practice ,plz help

*May 18, 2016*

**Chemistry**

How can I do an acrostic poem for the word REDOX?

*May 2, 2016*

**Algebra**

A campground consist of 10 square campsites arranged in a line along the beach the distance from the edge of the campsite to the water is 4 yards the area of the campground including the beach Is 1050 yd.² what's the width of one campsite

*April 19, 2016*

**math**

Suppose you have an extremely unfair coin: the probability of a head is 1/5, and the probability of a tail is 4/5. If you toss the coin 40 times, how many heads do you expect to see? A. 8 B. 6 C. 5 D. 4

*April 12, 2016*

**statistics**

Data has been collected from a representative of a well-defined population to answer the question: "How much money does the average senior male at Normal Community High School have in his pockets at the end of the school day on Friday?" The next step in the study is ...

*March 28, 2016*

**chemestry**

Calculate the number of moles of NH3 that can be formed from the complete reaction of 0.30 moles of N2 according to the equation N2 + 3H2 → 2NH3

*March 24, 2016*

**Physics 101**

A storage tank of negligible mass and 30m high is filled with gasoline. What is the force that acts on a square access hatch at the bottom of the tank that measures 0.5m x 0.5m

*March 21, 2016*

**Language Art's HELP ASAP!**

xD I WAS JUST READING THE COMMENTS XD LOL

*March 14, 2016*

**Grade 8 Art**

Thanx Anonymous.

*February 24, 2016*

**math**

what is P(78.3 < x bar < 85.1)?

*February 20, 2016*

**chemistry**

I need help in the formula to calculate these types of problems 125ml of 0.43M of HCl + 17ml of 1.8M HCl Calculate the concentrations of solutions resulting from the mixture

*February 5, 2016*

**The Oregon Country Unit 2 Lesson 4**

GG perfect scores

*February 4, 2016*

**Chemistry**

A Se-75 source is producing 310 rem at a distance of 3.0 m. What is the distance needed to decrease the intensity of exposure to below 25 rem, the level at which no effects would be detectable.

*February 1, 2016*

**algebra**

what is the value of j in the equation square root of j plus the square root of j plus equals 3 the square root of j plus 10?

*January 24, 2016*

**Chemistry 105**

How do I write 23 grams+ 0.022 grams into a significant figure?

*January 20, 2016*

**Math**

Would it be true if you doubled it?

*January 10, 2016*

**Math**

A recipe calls for 3/4 cup flour and 2/3 cup butter. Does the recipe require more flour or butter? Is this still true if the recipe is doubled? Explain how you determined your answer.

*January 10, 2016*

**Math**

Tom has green and red tomatoes in a bag a 4 to 3 ratio 5 green tomatoes and 5 red tomatoes were removed making the ratio become 3 to 2 how many red tomatoes were originally in the bag Please show me how to work the problem

*January 5, 2016*

**math**

write a problem about going to the laundromat that has a hidden question. a single load of laundry costs $2 and a double load costs $4.explain how you solved your problem.

*December 16, 2015*

**Language arts**

OHHH MY LORD which one of yall is right

*December 1, 2015*

**Chem 1211**

Calculate the wavelength (in nm) of a photon needed to eject an electron with a kinetic energy of 3.93 eV from a metal surface with a work function of Φ = 0.60 eV. {h = 4.136×10-15 ev·s, c = 2.998×1017 nm/s}

*November 29, 2015*

**science - matter**

at what temperature will 45g of solid dissolve

*November 23, 2015*

**math**

Their are 12 crayons - 1 =9

*November 19, 2015*

**Language Arts**

What is the main theme of the story the bachelor tells in "The Story-Teller"? Good children win many medals Parks are beautiful places Too much goodness can be bad *** Good people do something bad eventually

*November 18, 2015*

**Language Arts**

In "The Story-Teller," what can you infer about the bachelor from the answers he gives when the children interrupt his story with questions? He is impatient He does not understand what others say He does not know what children like He has a good imagination ***

*November 18, 2015*

**Math**

A pole that is 3.2m tall casts a shadow that is 1.4m long. At the same time, a nearby tower casts a shadow that is 39.5m long. How tall is the tower? Round your answer to the nearest meter.

*November 14, 2015*

**Health**

My answer is Reproductive Gland

*November 13, 2015*

**Health**

When you wake up and a large pimple greets you when you look into the mirror, this endocrine gland is to blame Thymus Gland Reproductive Gland Thyroid Gland Pancreas

*November 13, 2015*

**Health**

During puberty, you may find yourself on a roller coaster, one minute you feel like crying and the next minute you are on top of the world. This could signify that you’re suffering from a hormonal imbalance. *** hormonal surge. hormonal shortage. hormonal discrepancy

*November 13, 2015*

**Calculus**

Squares with sides of length x are cut out of each corner of a rectangular piece of cardboard measuring 3 ft by 4 ft. The resulting piece of cardboard is then folded into a box without a lid. Find the volume of the largest box that can be formed in this way. b) Suppose that in...

*November 5, 2015*

**Physics**

A mass m = 85 kg slides on a frictionless track that has a drop, followed by a loop-the-loop with radius R = 19.2 m and finally a flat straight section at the same height as the center of the loop (19.2 m off the ground). Since the mass would not make it around the loop if ...

*October 31, 2015*

**BioChem**

Given stocks of 1M lactic Acid (pka 3.86) at pH 3.5, 2 M NaOH, 2M HCl and water; how would you prepare 4 Liters of 0.05M lactic acid at pH 3.25. I know you use the Hendersen-Hasselbeck eqn, just not sure how to start. Please help.

*October 29, 2015*

**Math**

Golds gym charges $150 to sign up and $10 per month. Fitness express charges not initial fee but charges $25 per month. When will the cost be the same? Show work please!!

*October 27, 2015*

**ap chem**

if 3.2 kcal of heat is added to 1kg of ice at 0 celcius, how much ice is produced and how much ice is left?

*October 21, 2015*

**Intermediate Algebra for College**

Imagine that you are looking to rent a car that costs $15 a day, and you will be charged an additional 25 cents for every mile you drive it during the day. The following formula can be used to calculate the cost for driving the car for a day: C = 0.25m + 15 If you were to ...

*October 15, 2015*

**math**

Find the absolute maximum and the absolute minimum value, if any of: f(x)= (-1x^2/8)+4x+3 on the interval (0,9)

*October 12, 2015*

**Math**

Find the absolute maximum and the absolute minimum value, if any of: f(x)= -1x^2/8+4x+3 on the interval (0,9)

*October 12, 2015*

**Calculus**

The altitude attained by a model rocket t seconds into flight is given by the equation: -t^3+3t^2+20t-3 where t is greater than or equal to 0 seconds. find the maximum altitude attained by the rocket. first I found the derivative of the original equation and set it to 0. which...

*October 12, 2015*

**chemistry**

A ground state hydrogen atom absorbs a photon of light having a wavelength of 93.73 nm. It then gives off a photon having a wavelength of 1094 nm. What is the final state of the hydrogen atom?

*October 11, 2015*

**Stats**

About 10% of the population of a large country is math phobic. If two people are randomly selected what is the probability both are math phobic? And hat is the probability that at least one is math phobic? Any way to do this on stat crunch?

*October 11, 2015*

**Math**

Monica Collects quarters, dimes, nickels and pennies. This afternoon she took $ 1.00 from her collection. She counted the coins and found that she had twice as many nickels as dimes. What coins could Monica have?

*October 1, 2015*

**Social Studies**

Idk jelp

*October 1, 2015*

**Social Studies **

Name three factors factors that combine to make the eastern usa a industrial region

*October 1, 2015*

**Math**

Survey the population or use a sample,you want to know the type of computer, if any, that each student in your class has at home?

*September 28, 2015*

**math**

35/65 in simplest form

*September 25, 2015*

**Physics **

If the rate of continental drift were to abruptly slow from 1.0 cm/y to 0.5 cm/y over the time interval of a year, what would be the average acceleration?

*September 15, 2015*

**math**

how can you find what each mark represents on a number line?

*September 13, 2015*

**fundamentals of math**

there are 40 bikes inspected. If 15 need new tires and 26 need gear repairs. -what is the greatest number of bikes that could have needed both repairs? -The least number that could have needed both? -Greatest number that could have needed neither repair?

*September 5, 2015*

**Art**

The society that a rises from a concern regarded as excellent in art .

*August 31, 2015*

**Physical Chemistry**

If 5.00 mL of 3% H2O2 is decomposed, how many mL of gas will be produced at 1.01 bar and 25C?

*August 31, 2015*

**Determining whether expired air contains carbon dioxide**

1.Formulate a hypothesis for this investigation 2.State the aim of this investigation 3. a)Independent variable b)Dependent variable c)Controlled variable 4.State methods and the control

*August 23, 2015*

**physics**

A car travels at a constant speed of 30 mph for 20 miles, at a speed of 40 fps for the next 20 miles, and then travels the final 20 miles at 90 kph. what is the average speed of the entire trip?

*August 23, 2015*

**Math**

The supplement of an angle measures 11 times its complement. Then the measure of the angle is... A. 9 degrees B. 81 degrees C. 90 degrees D. 99 degrees E. 100 degrees

*August 3, 2015*

**Math**

Thanks

*August 3, 2015*

**Math**

jack and jerry can complete a job together in 4 hours. if jack require 6 hours to do the job alone, how many hours will it take jerry to do the job alone. A.12 B.10 C.8 D.6 E.4

*August 3, 2015*

**chemistry**

The formula for rust can be represented by Fe2O3. How many moles of Fe are present in 24.6 g of the compound? Please guide me through it thank you!

*July 28, 2015*

**AP Chemistry**

The formula for rust can be represented by Fe2O3. How many moles of Fe are present in 24.6 g of the compound?

*July 28, 2015*

**Math**

Thanks

*July 10, 2015*

**Math**

Ralph's age is currently 3 years more than twice joe's age. But 3 years ago, ralph was was 4 times as old as Joe was the . How old will joe be in 10 years?

*July 10, 2015*

**Organic Chemistry**

Dr. Bob, Thank you for the chart; its really helps. Just to make sure I am on the same page as you. I look up the bonds listed. F-I has the highest deltaHf (kj/mol). So that means that is takes more energy to break that bond; thus have the strong bond?

*June 22, 2015*

**Organic Chemistry**

1. Which of the following bonds is the strongest? a. F-F b. F-Cl c. F-Br d. F-I I think it's A because of the same atomic radius. Is that correct? Am I on the right track?

*June 22, 2015*

**geometry**

An artist wants to make alabaster pyramids using a block of alabaster with a volume of 576 cubic inches. She plans to make each pyramid with a square base area of 3 square inches and a height of 4 inches. At most, how many pyramids can the artist make from the block of ...

*June 19, 2015*

**Chemisrty**

Calculate the grams of substance from the moles of substance given.... 2 moles C6H10O5. Please help I am lost!

*June 17, 2015*

**Organic Chemistry**

Which isomer of 1-ethyl-3-methylcyclohexane is more stable, cis or trans? My teacher hasn't covered this material as of yet, but we have a test done tomorrow on it. What is a cis and trans? Not sure how to begin figuring this out. My text book isn't helpful. Thanks

*June 15, 2015*

**Organic Chemistry**

Thank you Dr.Bob. For some reason my textbook doesn't have any answers to the selected problems so I don't know if I on the right track. I really appreciate your help.

*June 14, 2015*

**Organic Chemistry**

What is the hybridization of all the atoms (other than hydrogen) in each of the following species? a) NH3 e) +NH4 i) H3O+ b) BH3 f) +CH3 j)H2C=O c) -CH3 g) HCN d)*CH3 h) C(CH3)4 There are a couple I don't know how to do. Please help? Did I do the other correctly? Thanks. a...

*June 14, 2015*

**Organic Chemistry**

Is eutectic point and eutectic mixture the same thing? If not what is the difference between the two? Thanks in advance.

*June 11, 2015*

**us gov**

what single word means the same thing as representative democracy

*June 10, 2015*

**Chemistry**

analyze and describe the different types of genetic mutations and their effects

*June 8, 2015*

**Math**

Q. Tim and Jorge hope they will be assigned to the same cabin at the summer camp. Each cabin has 8 beds in it. And Tim knows that he is saying in the green cabin not the red cabin. If there are 14 boys going to camp in addition to Tim and Jorge. What is the change that Tim and...

*May 28, 2015*

**Math**

Thanks!

*May 21, 2015*

**Math**

Thanks!

*May 21, 2015*

**Math**

Q. Neil found out that the Sunday paper that he delivers is about 1 pound and 12 ounces. He delivers 39 newspapers on Sunday's. How much do the 39 newspapers weigh? (Hint: 16 ounces = 1 pound) A. I tried adding 16 12 times but that didn't work after I found out it was ...

*May 21, 2015*

**Math**

4:31

*May 19, 2015*