Wednesday

September 2, 2015
Total # Posts: 481

**science**

light trsavels at 3*10 m/s. an astrounaut shines a flash light in space. 4 hours later a martian sees a light from the astrounaut. how far away is mars from the astrounaut?
*April 17, 2013*

**Math**

Do you know how to remove parentheses?
*April 16, 2013*

**Math help Geometery**

I think rbowh left 360 degrees off the end of the sentence in the last comment.
*April 16, 2013*

**Chemistry**

What is the theoretical mass of the products in the double displacement reaction: CaCl2 (aq) + Na2CO3 (aq) → 2NaCl (aq) +CaCO3 (aq)
*April 5, 2013*

**math**

A building lot in a city is shaped as a 30° -60° -90° triangle. The side opposite the 30° angle measures 41 feet. a. Find the length of the side of the lot opposite the 60° angle. b.Find the length of the hypotenuse of the triangular lot. c. Find the sine, ...
*March 8, 2013*

**Chemistry Help!**

If 100 grams of KClO3 are heated to form KCl and O2 according to the equation KClO3 ¨ KCl + O2 (Hint: You need to balance the equation) a. How many moles of KClO3 reacted? b. How many moles of KCl are formed? c. How many grams of KCl are formed? d. how many moles of ...
*February 12, 2013*

**Physics**

What is the magnitude of the force a +29 charge exerts on a +3.3 charge 48 away?
*January 26, 2013*

**Statistics **

The amount of soda a dispensing machine pours into a 12 ounce can of soda follows a normal distribution with a standard deviation of 0.12 ounces. Every can that has more than 12.30 ounces of soda poured into it causes a spill and the can needs to go through a special cleaning ...
*December 7, 2012*

**Math**

5/6 is the greatest i helped you please help me
*November 26, 2012*

**math**

If franco is ordering lunch with a drink,sandwich,and a salad.He has the choice of 3 drinks,2 sandwichs,4 salads how many possible lunches are there? Tamara has 4 times as many pages to read for her book report as maria.Tamara has 20 pages left to read.How many pages does ...
*November 26, 2012*

**math 3rd grade**

Well see 4x7 doubled is well 28+28=56 so 4x7 doubled is equal to 8x7 hope this helps
*November 26, 2012*

**Math**

Well the florida one is b
*November 26, 2012*

**ENGLISH **

Identify the regular or irregular verb:John has become or has became a rather good actor. I choose ( has become)
*November 17, 2012*

**Math**

Sandy works at a clothing store. She makes $9 per hour plus earns 10% commission on her sales. She worked 78 hours over the last two weeks and had a total of $2,340 in sales before taxes. Which of the following is closest to how much she will earn in hourly wages and ...
*November 15, 2012*

**Physical Science**

Compute the wavelength in air of ultrasound with a frequency of 50 kHz if the speed of sound is 344 m/s.
*November 8, 2012*

**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.
*November 4, 2012*

**Physics**

A boy wishes to throw a rock into the river below the cliff where he is standing. The cliff is 50 M high and he can throw with a horizontal velocity of 30 m/s. how long does it take for the rock to reach the water? How far, in the horizontal direction, does the rock land?
*October 30, 2012*

**Trigonometry**

If the shadow of a building increases by 10 meters when the angle of elevation of the sun rays decreases from 70o to 60o, what is the height of the building?
*October 26, 2012*

**Trigonometry**

Karla is riding vertically in a hot air balloon, directly over a point P on the ground. Karla spots a parked car on the ground at an angle of depression of 30o. The balloon rises 50 meters. Now the angle of depression to the car is 35°. How far is the car from point P?
*October 26, 2012*

**Science**

According to what I know, m/s is the unit for linear speed or the velocity.
*October 25, 2012*

**calculus**

Two cars start from the same point at the same time. One travels north at 25 mph, and the other travels east at 60 mph. How fast is the distance between them increasing at the end of 1 hr? Find D after 1 Hr, solve D^2=25^2+ 60^2
*October 23, 2012*

**chemistry**

if 16.o ml HCL is needed to neutralize from a 2.25g sample of organic material, calculate the mass percentage of N in the sample
*October 13, 2012*

**science**

what is the control in the following experiment - which brand of popcorn has the least amount of un-popped kernels after 3 minutes?
*October 5, 2012*

**Math**

you take the principal multiplied by the rate by the time. That equals the interest and then you add it to the principal that is the future total
*October 5, 2012*

**math**

I agree and I only agree because all of you agree
*September 24, 2012*

**Math**

The perimeter of a rectangular deck is 175 feet. The length of the deck, L, is 6 feet longer than 2 times the width, W. Which system of equations can be solved to determine the length and width, in feet, of the deck? What is the correct formula and why? a) 2L+2W=175 L=2-6W b) ...
*September 20, 2012*

**6th grade science**

Thanks!
*September 16, 2012*

**6th grade science**

Is latitude the up and down lines on a map?Or the side to side lines? Thanks
*September 16, 2012*

**6th grade science**

thanks
*September 16, 2012*

**6th grade science**

What is porosity and permeability? Thanks
*September 16, 2012*

**6th grade science**

thanks
*September 16, 2012*

**6th grade science **

What is a A topographic map used for? thanks
*September 16, 2012*

**6th grade science**

never mind my big brother helped me but thanks anyway
*September 16, 2012*

**6th grade math**

THANKS!
*September 11, 2012*

**6th grade math**

f + (–15) = –32
*September 11, 2012*

**math**

thanks
*September 11, 2012*

**math**

Subtract. –84 – 55 the answer is -29 right?
*September 11, 2012*

**history**

Who was the Danish immigrant who photographed immigrant life to make people aware of the problems immigrants faced in the United States?
*September 10, 2012*

**HISTORY **

Which series of events is in the correct chronological order? Plessy v. Ferguson, ratification of the 14th Amendment, end of Reconstruction ratification of the 14th Amendment, end of Reconstruction, Plessy v. Ferguson ratification of the 14th Amendment, Plessy v. Ferguson, end...
*September 10, 2012*

**Science**

weather . com it's like this because you can't post internet addresses without a url
*September 10, 2012*

**history**

Lee Yick took his case to the Supreme Court and lost because, under the 14th Amendment, only U.S. citizens had the rights of due process and equal protection of the laws true or false
*September 10, 2012*

**History Christopher Columbus**

Well every body thinks it was Christopher Columbus,but actually it was people who walked over a huge land bridge during the ice age.Some people also think that they canoed over to America.
*September 10, 2012*

**math**

thanks
*September 10, 2012*

**math**

I'm in sixth grade What is the value of |–46| ?
*September 10, 2012*

**math**

What value of f makes the equation true? f – 18.4 = 11.8
*September 10, 2012*

**math**

Which equation could be used to find the perimeter of an isosceles triangle, with two sides 13 cm long, a base 10 cm long and a height of 12 cm? A. P = (10 × 12) ÷ 2 B. P = 2 × 13 + 10 C. P = 13 + 10 + 12 D. P = 2 × 10 + 13
*September 10, 2012*

**algebra**

How do you Simplify
*September 6, 2012*

**3rd math**

okay Math genius! Help me out here. I am a number greater than 99 and less than 1,000. Two of my digits that aren't next to each other are the same. My tens digit could not be greater and it is 1 more than my hundreds digit. What number am I?
*September 6, 2012*

**math**

the distance between new york city and boston is 189.9 miles as the bird flies.how far is it in kilometers?
*September 5, 2012*

**math**

joe drank 4 liters of water on monday and 4 deciliters of water on tuesday.how much more water did he drank on monday than on tuesday
*September 5, 2012*

**Math**

Write a 7 digit numeral with 6 in the ones place, 3 in the thousandths place, 1 in the thousands place, 2 in the tenths place, and 0's in a ll the other places?
*September 5, 2012*

**social studies**

whatevent led the United States protest German actions in 1915
*July 26, 2012*

**math**

v(t)= Ce^(k(square root(t)) Suppose that the dealer, who is 25 years old, decides to sell the card at time , sometime in the next 40 years: 0< or equal to t < or equal to 40. At that time , he’ll invest the money he gets for the sale of the card in a bank account ...
*May 23, 2012*

**chemistry**

Washing soda, a compound used to prepare hard water for washing laundry, is a hydrate, which means that a certain number of water molecules are included in the solid structure. Its formula can be written as Na2CO3·x H2O, where x is the number of moles of H2O per mole of...
*May 15, 2012*

**chemistry**

Washing soda, a compound used to prepare hard water for washing laundry, is a hydrate, which means that a certain number of water molecules are included in the solid structure. Its formula can be written as Na2CO3·x H2O, where x is the number of moles of H2O per mole of...
*May 15, 2012*

**Chemistry**

What is the oxidation state of: O2 HSO4- Na2HPO4 CrCl3
*May 3, 2012*

**English**

And you might want to fix the spelling error "They key" to "The key" (:
*May 1, 2012*

**English**

That sounds pretty good. It seems as though you might have copied some of that off Wiki... I'm not accusing you of anything so dont get offended. but that sounds good!
*May 1, 2012*

**Chemistry**

Write the IUPAC name for straight-chain hydrocarbon with this formula: CH3CH2CH2CH2CH2CH2CH3 Write the IUPAC name for any branched-chain hydrocarbon with this formula:C9h20
*April 29, 2012*

**chemistry **

how much 10M HNO3 must be added to 1L of a buffer that is .010M acetic acid and .10M sodium acetate to reduce the pH to 5. pKa=4.75
*April 18, 2012*

**chemistry**

To what volume must 481 mL of 12 M Ca(OH)2 solution be diluted to make a 2 M Ca(OH)2 solution? a)1.352L b)2.886L c)2.10833L d)none of the above
*April 4, 2012*

**Crime scene chemistry**

What would happen to the denisty of a plastic sample if an excessive number of air bubbles were allowed to accumulate on the plastic surface when placed into the solution?
*March 28, 2012*

**Spelling**

The homework question that I just posted at 7:03pm is for a kindengarden.
*March 21, 2012*

**Spelling**

The teacher didn't define, this is for a kindengarden class.
*March 21, 2012*

**Spelling**

The homework assignment is first the child has four spelling words to write five times and memorize and then the homework assignmen says make three clusters of words using fl for example fly.
*March 21, 2012*

**Spelling**

I'm sorry I typed the question wrong. The question is: Make three cluster words using f l
*March 21, 2012*

**Spelling**

What does it mean when the homework says: Make three F L cluster words example fly?
*March 21, 2012*

**Algebra **

composit function 2 f(x)-4g(x) if f(x)= x2+4x-1 and g(x)= 2x-4
*March 2, 2012*

**physics**

a car is traveling 20.0 m/s when the driver sees a child standing in the road. he takes 0.80 seconds to react, then steps on the brakes and slows at -7.0 m/s squared. how far does the car go before it stops?
*February 27, 2012*

**Bus Finance**

You want to purchase a home. cost $165,000. you have $40,000 downpayment. you want to finance rest at 3.5% for 15 years. how much will monthly mortgage be? How much in total will you pay over the 15 years even counting the downpayment? I came up with payment of $893.6 for ...
*February 6, 2012*

**Bus Finance**

so I was supposed to divide not multiply for my initial amount and then if I had used those correctly with the NOM% and EFF I should have come up with it correctly? I will try it again. I could swear in my notes he said we had to multiply. Thanks Again
*February 3, 2012*

**Bus Finance**

I have inherited $40,000. I want to save it for 5 years to make down payment on new home. I get info from two diff banks. Bank A - 5.78% APR with semi annual compounding. Bank B - 5.75% APR with daily compounding. Which bank would you use to maximize your return? For Bank A - ...
*February 3, 2012*

**Bus Finance**

to continue. it asks how much in total you will pay over the 15 years based on mortgage and down payment. I used the (893.60*12)(15)+40,000=200848.00. It then asks what portion of that is interest. I used the 200848.00FV 125000PV 180N with the I/YR=3.17%.
*February 3, 2012*

**Bus Finance**

You want to purchase a home. cost $165,000. you have $40,000 downpayment. you want to finance rest at 3.5% for 15 years. how much will monthly mortgage be? How much in total will you pay over the 15 years even counting the downpayment? I came up with payment of $893.6 for ...
*February 3, 2012*

**Business Finance**

you are saving for your child's college.. there are 15 years before they will be in college. you have saved 0 so far. Your goal is $98,000. assume annual in rate is 8%. how much must you save at the end of each year in equal amounts to reach your goal? I know that with the...
*February 3, 2012*

**Chemistry**

A B & C are correct D.Should say: 2F---Fsub2. Exothermic. One bond is formed F-F 0-155= -155kJ/mol.
*January 22, 2012*

**Physics (my last problem)**

A 3.4 kg ogject to the right at 3.5 m/s hits a stationary object of mass 2.7 kg. After the collision the 2.7 kg object moves to the right at 1.8 m/s. A) What is the final verlocity of the 3.4 kg object? B) What is the total kinetic energy og the objects before the collision? C...
*December 19, 2011*

**Physics -.-**

thank you soooooo much(:
*December 19, 2011*

**Physics -.-**

A projectile is shot horizontally at 220 m/s from the top of a 620 m high cliff. A) How long till the projectile hits the ground? B) How far from the base of the cliff does the projectile land? I am gonna be honest. I have no idea how to do any of my Physics homework. ): I ...
*December 19, 2011*

**AP US History**

How did the McKinley Tariff Act hurt the farmers?
*December 16, 2011*

**more physics ):**

A tennis player places a 51 kg ball machine on a frictionless surface, as shown below. The machine fires a 0.067 kg tennis ball horizontally with a velocity of 33.4 m/s toward the north. What is the final velocity of the machine? Can you please EXPLAIN how to get the answer?!
*December 15, 2011*

**physics )':**

A 66.5 kg ice skater moving to the right with a velocity of 2.80 m/s throws a 0.16 kg snowball to the right with a velocity of 20.4 m/s relative to the ground. (a) What is the velocity of the ice skater after throwing the snowball? Disregard the friction between the skates and...
*December 15, 2011*

**trig (pre-cal class)**

Suppose è is an acute angle of a right triangle. For this function, find the values of the remaining five trigonometric functions of è. Round to four decimal places. sin è = 0.1 cos è = tan è = cot è = csc è = sec è =
*December 15, 2011*

**Geometry**

If m<DBC=10x and m<ACb=4x^2, find m<ACB. The quadrilateral ABCD is a rectangle. B ------------- C | | | | | | | | A -------------|D There are diagonal bisectors inside the rectangle but I could not draw them in. The diagonals are DB and CA and the point in the middle ...
*December 11, 2011*

**8th grade math**

Okay, so you have two variables, let's call them x and y. x will be the weight of the water when the tank is full, and y will be the weight of the tank. So you can get two equations from the question: .4x+y=80 (1) x+y=140 (2) and now you can do elimination by subtracting (...
*December 7, 2011*

**chemistry**

8.38% thank you very much
*December 4, 2011*

**chemistry**

What is the mass pecent of an aqueous sodium hydroxide in which the mole fraction of NaOH is 0.162? The density of the solution is 1.3311 g/ mL
*December 4, 2011*

**statistics**

what is the sample mean for extrinsic value by gender
*November 22, 2011*

**Geometry**

the measure of each exterior angle is 45. how many sides does the polygon have?
*November 20, 2011*

**math**

What is the principle of powers? Describe in your own words. When solving a radical equation, how do we use the principle of powers to eliminate radicals? Demonstrate with an example.
*November 17, 2011*

**Math**

solve: 4x^2 + 14x = 0 help me solve
*November 17, 2011*

**Math**

Can you show us how to find the discriminant of the quadratic x^2 + 2x -2 =0
*November 17, 2011*

**math **

create the equation: x=2 and x=5
*November 15, 2011*

**Math**

Make an equation that has solutions x= 9 and x = -2/3
*November 14, 2011*

**math**

Multiply ã7(ã10-ã6)
*November 13, 2011*

**Math**

Add simplify by collecting like radical terms if possible 3ã45+4ã180
*November 13, 2011*

**math**

so I would have abd answer of 4root symbol625^3
*November 13, 2011*

**math**

write an equivalent expression using radical notation 625 3/4 Help
*November 13, 2011*

**math**

add simplify by collecting like radical terms if possible assuming that all expressions under radicals represent nonnegative numbers ã2a+5ã8a^3 i have the answer as (1+10a)squareroot symbol 2a is this correct?
*November 12, 2011*

**math**

Subtract simplify by collecting like terms if possible 9 3ã4-3 3ã4 Would the answer be 6 3ã4
*November 12, 2011*