Wednesday

July 1, 2015

July 1, 2015

Total # Posts: 82,630

**Calculus**

During a certain epidemic, the number of people that are infected at any time increases at rate proportional to the number of people that are infected at that time. 1,000 people are infected when the epidemic is first discovered, and 1,200 are infected 7 days later. Write and ...
*April 9, 2015*

**Division**

Maria cut a pizza into 8 equal slices she put a slice of pizza on 3 plates what is the measure of the angle for the angle for the slices that are left?
*April 9, 2015*

**Calculus**

The number of people that hear a rumor follows logistic growth. In a school of 1500 students, 5 students start a rumor. After 2 hours, 120 students have heard about the rumor. Recall: dy/dx=ky(1-Y/L) and y=L/(1+be^(-kt)) I found the logistic growth equation to be 1500/(1+299e...
*April 9, 2015*

**Calculus**

Can you explain why it's simplified to e^-2ydy=2xdx. I dont understand why it's e^negative 2y
*April 9, 2015*

**Calculus**

Find the particular solution (solved for y) for the differential equation dy/dx=2x/e^(2y) satisfying y(0)=1.
*April 9, 2015*

**chemistry**

how many grams of CaCI would be required to produce a 8.5M (molar) solution with a volume of 2.0L
*April 9, 2015*

**chemistry**

how many grams of CaCI would be required to produce a 85M (molar) solution with a volume of 2.0L
*April 9, 2015*

**Math**

The capacity of a 1 cm cube is 1 mL. How many 1 cm ice cubes would you need to melt to fill a 1.5 L jar?
*April 9, 2015*

**Trigonometry**

2sin^2(x )+38 cos(x) + 2.6=0
*April 9, 2015*

**CALCULUS **

Consider the function f(x)=9x3−4x5. Let F(x) be the antiderivative of f(x) with F(1)=0. Then F(4) =
*April 9, 2015*

**Calc**

Evaluate the indefinite integral (3/x^6)-4√(x^2)
*April 9, 2015*

**math /fraction**

a container of fruit punch contains one half apple juice, one third pineapple juice and one sixth orange juice. If the container contains 12 cups how many cups are pineapple juice?
*April 8, 2015*

**Geometry help**

If a regular triangle has a perimeter of 30sqrt3 what is its apothem?
*April 8, 2015*

**Chemistry **

Calculate the molar solubility of Mg(OH)2 in the following solvents: (i) 8.60×10−2M MgCl2 (ii) 3.70×10−2M KOH(aq) Please help!!!
*April 8, 2015*

**arrays and an expanded algorithm**

29×47
*April 8, 2015*

**Chemistry**

What is the value of Ksp?
*April 8, 2015*

**Chemistry**

Calculate the molar solubility of Mg(OH)2 in the following solvents: (i) Pure Water (ii) 8.60×10−2M MgCl2 (iii) 3.70×10−2M KOH(aq) How should i solve this problem?
*April 8, 2015*

**Science**

When you make a pedigree and it says Theos wife Mary is a purebred right-handed person what does purebred mean
*April 8, 2015*

**Chemistry**

@DrBob222 .......Thanks. It worked.
*April 8, 2015*

**Chemistry**

Using the Henderson-Hasselbalch equation, should i write this: pH= -log ka + log(0.168/0.106) PH= -log(5.6*10^-10) + log(0.168/0.106) PH=9.45
*April 8, 2015*

**Chemistry**

For a solution that is 0.168M NH3 and 0.106M NH4Cl calculate the following. [OH-] [NH4+] [Cl-] [H30+]
*April 8, 2015*

**need HELP PHYSICS!!**

a) Calculate the P.E. a pile driver has if it is raised 4.5 meters by a mechanical winch. If the 510 kilogram pile driver is allowed to fall freely, what would its velocity be at ground level. b) A 4.2 kg mortar shell is fired out of a mortar with a velocity of 120 m/s. What ...
*April 8, 2015*

**Physics**

F=m*g F/g=m 100/9.8=10.2 kg
*April 8, 2015*

**Math**

Why not?
*April 8, 2015*

**Math**

can prisms that have the same height and same base perimeter have different volumes?
*April 8, 2015*

**Math**

Assuming it's linear. Dy/dx -> (13-9)/(2-1)=4=k. 9=4*1+m -> m=5 y=4x+5
*April 8, 2015*

**LA plz help ms.sue**

@ms.sue thnx!
*April 8, 2015*

**LA plz help ms.sue**

thanks u ur awesome
*April 8, 2015*

**LA plz help ms.sue**

2.Which excerpt from the play best supports the answer to the reason Anne spends time with Peter? A I’m sorry Mother. I’m going to Peter’s room. I’m not going to let Petronella Van Daan spoil our friendship. B I mean, every time I go into Peter’s room...
*April 8, 2015*

**exponential equations**

A colony of Streptococcus bacteria has a current population of 450 organisms. This particular strain has a doubling time, d , of 25 minutes. Calculate the future population after 2.5 hours.
*April 8, 2015*

**exponential equations**

Listeria has a current population of 400 organisms. After 72 minutes the population increased to 6400 organisms. Calculate the doubling time, d, of the bacteria.
*April 8, 2015*

**exponential equations**

A colony of Salmonella bacteria has a current population of 1000 organisms. If this particular strain has a doubling time, d, of 18 minutes, calculate the future population after 180 minutes.
*April 8, 2015*

**Art**

The correct answers are C B and D.
*April 8, 2015*

**Math**

Travis is making 5 lasagna using 12 cups of cheese. Which number represents the amount of cheese he will use per lasagna?
*April 8, 2015*

**plz help science**

@ anyone idk so plz help this kid
*April 8, 2015*

**mat**

You deposit $555.00 in an account earning 5.5% interest compounded money (principle plus interest) do you have in this account at the end of 55 months?
*April 8, 2015*

**mat**

you deposit $125.00 in an account earning 4.5% continuously compounded interest. How many onths does it take to double your money? That is, principle plus interest equals $250.
*April 8, 2015*

**mat**

You deposit $125.00 in an account earning 4.5% continuously compounded interest. How much money (principle plus interest) do you have in this account at the end of 38 months?
*April 8, 2015*

**mat**

You deposit $125.00 in an account earning 4.5% interest compounded monthly. How much money (principle plus interest) do you have in this account at the end of 38 months?
*April 8, 2015*

**Exponential Equations**

1024000?
*April 8, 2015*

**Exponential Equations**

A colony of Salmonella bacteria has a current population of 1000 organisms. If this particular strain has a doubling time, d, of 18 minutes, calculate the future population after 180 minutes. 1000er^18 1e+54
*April 8, 2015*

**Precal **

Can you explain how to complete the square? x^2 -y^2 - 2x +4y-6=0
*April 8, 2015*

**Math**

Hehe thank you soooooo much, you have just made my day literally :D Yay for you too!!! :)
*April 7, 2015*

**Math**

Yes 100% correct :) Please note this should be under art :) Please let me know if possible, out of the kindness in your heart, if your first art question was C. I am so sorry to keep disturbing you, i know you must be very busy
*April 7, 2015*

**Spanish**

By itself...it is a title.
*April 7, 2015*

**Spanish **

How would I say "Unhealthy cafeteria food" in spanish? Would it be "comida de la cafetería no saludable"?
*April 7, 2015*

**Art**

Yes Kanani it is. I will check your third question if you would like. ;) Just please remember to tell me if C was correct for the one about the drawing, it would mean so much to me :)
*April 7, 2015*

**English**

Which excerpt from the play best supports the answer to the reason Anne spend time with Peter in the third read of the diary of Anne Frank? A."I'm sorry Mother, I'm going to Peters room. I'm not going to let Petronella Van Dann spoil our friendship." B.&...
*April 7, 2015*

**English**

Sorry I meant infinitive. The answer is B I think.
*April 7, 2015*

**English**

Which sentence contains an infinite phrase? A. Anne passed the time by sharing her dreams. B. Anne wanted to live in Paris. C. Her favorite activity was riding a bike. D. Living in hiding, she did with little privacy. Is the answer A?
*April 7, 2015*

**Language Arts**

yes its c
*April 7, 2015*

**Language Arts**

Hi! It's me from your art question. According to the site Ms. Sue was so kind to provide, I believe it would be C. Hope this helps and please tell me if C was correct for the art post about the drawing :) Quickly snatching up the coat modifies she.
*April 7, 2015*

**Art**

Yes Ms. Sue, it seems to be :) I thought C in agreement with Kanani because green and red are complementary colors, and that soft blue contrasts with both the red and green. I do not believe contrast creates unity at all. What do you think ?
*April 7, 2015*

**Art**

Hi! I would definitely go with C, it makes the most sense, please let me know if I am wrong :)
*April 7, 2015*

**Language arts help**

I thought that the word had to end in ing or ed. That's why I choose C. Other than that I don't understand.
*April 7, 2015*

**Language arts help**

Is the answer B?
*April 7, 2015*

**Language arts help**

In the following sentence, what word does the participial phrase modify? Everyone in the annex heard her screaming loudly. A. Everyone B. annex C. heard D. her Is the answer C? Thank you on advance
*April 7, 2015*

**Math**

the Ruby Snow Company makes custom snowboards. the company's profit can be modelled with the relation y=6x^2+42x-60,where x is the number snowboards sold(in thousands) and y is the profit (in hundreds of thousands of dollars) How many snowboards does the company need to ...
*April 7, 2015*

**Math**

the Ruby Snow Company makes custom snowboards. the company's profit can be modelled with the relation y=6x^2+42x-60,where x is the number snowboards sold(in thousands) and y is the profit (in hundreds of thousands of dollars) How many snowboards does the company need to ...
*April 7, 2015*

**Math**

How do you find x in y=-5x^2+30.5x without using the formula x=-b+ root b^2-4ac.... They say to factor it. But it's not working for me. The answer is suppose to be x= About 0.7 and 5.4. But I can't get that answer
*April 7, 2015*

**Math**

Does a in y=ax^2+bx+c have to be positive?
*April 7, 2015*

**chemistry**

Find (triangle)H for N2H4 + CH4O > C2HO + N2 + 3H2 2NH3 > N2H4 + H2 22.5 kJ 2NH3 > N2 + 3H2 57.5 kJ CH20 + H2 > CH4O 81.2 kJ
*April 7, 2015*

**Chemistry**

85g of oxygen react, how many grams of aluminum are required. The molar mass of oxygen is 32.0g/mol and the molar mass of aluminum is 27.0g/mole
*April 7, 2015*

**Math I need help ASAP!**

what is one
*April 7, 2015*

**Math**

Determine the coefficient of w x^3 y^2 z^2 in (2w−x+y−2z)^8. Thanks.
*April 7, 2015*

**History**

Is India a secular democracy? This isn't a homework question or anything this is just something I was wondering.
*April 7, 2015*

**math**

a man uses 1/3 of his land for growing mangoes,!/4 for bananas ,3/8 for apples ,and the remaining 18 hectares for oranges , so find how much land does the man have ?and find how much land does he use for growing apples ?
*April 7, 2015*

**Exponential Equations**

Jen made an initial investment of $1000 into a T-Bill account. After 2 years, her investment totaled $1 175. Calculate the rate of appreciation, r, of the investment. Give answer to 2 decimal places. 1000(1+r)=^2=1.1175 (1+R)^2=1.175 ??
*April 7, 2015*

**Physics**

bn,m,
*April 7, 2015*

**Accounting **

Bus Acquired Cost Salvage Value Useful Life in Years 1 1/1/13 $98,100 8,000 5 (straight-line) 2 1/1/13 129,000 11,900 5 (decline balance) 3 1/1/14 79,780 8,200 4 (units-of-activity) For the declining-balance method, the company uses the double-declining rate. For the units-of-...
*April 6, 2015*

**Chemistry**

What is the volume, in milliliters, required to prepare a. 20.0 mL of a 0.250 M KNO3 solution using a 6.00 M KNO3 solution b. 25.0 mL of a 2.50 M H2SO4 solution using a 12.0 M H2SO4 solution c. 0.500 L of a 1.50 M NH4Cl solution using a 10.00 M NH4Cl solution
*April 6, 2015*

**Accounting **

1/2/15 Purchased patent (6-year life) $521,580 4/1/15 Goodwill purchased (indefinite life) 395,170 7/1/15 14-year franchise; expiration date 7/1/2025 519,400 9/1/15 Research and development costs 169,890 Prepare the necessary entries to record these intangibles. All costs ...
*April 6, 2015*

**Chemistry**

Can anyone help me identify the solute and solvent in each solution with the steps if possible? Thanks! a. 10mL of acetic acid and 200mL of water b. 100.0g of water and 5.0g of sugar c. 1.0mL of Br2 and 50.0mL of methylene chloride
*April 6, 2015*

**chemistry**

a container with an initial volume of 6 liters at a temperature of 30 degrees celsius with a pressure of 2atm is changed so the temperature is now 90 degrees celsius and the volume is 8 liters. calculate the new pressure
*April 6, 2015*

**calc**

Let f(x)=2x+15−19ex. Then the equation of the tangent line to the graph of f(x) at the point (0,−4) is given by y=mx+b for m=? b=?
*April 6, 2015*

**Math**

Which stem-and-leaf plot represents the data set below? 56,65,67,72,85,88,89,96,97,104,113 A. 5|6 6|5 7 7|2 8|5 8 9 9|6 7 1|04 1|13 Key:8|9 means 89 B. 5|6 6|5 7 7|2 8|5 8 9 9|6 7 1|0 4 1|1 3 C. 5|6 6|5 6 7 7|2 8|5 9 9|6 7 8 10|4 11|3 D. 5|6 6|5 7 7|2 8|5 8 9 9|6 7 10|4 11|3 ...
*April 6, 2015*

**Math**

Ms. Allison drew a box-and-whisker plot to represent her students scores on a midterm test. These are the numbers on the box-and-whisker plot. Lowest value=44 Lower quartile=47 Median=52 Upper quartile=81 Highest value=96 Jason received 81 on the test. How does Jason's ...
*April 6, 2015*

**Math**

I have to find the median, the lower quartile, the upper quartile, minimum number, and maximum number of this data set I just want to make sure I am right. 73,73,78,78,81,87,89,92,93,95 My answers Median=84 Lower quartile=78 Upper quartile=92 Minimum number=73 Maximum number=...
*April 6, 2015*

**Physics**

the rope length is one half wavelength, so wavelength= 10 m freq*wavelenght=speedofwave
*April 6, 2015*

**Physics**

freq*wavelength=speedwave
*April 6, 2015*

**english**

*4. C
*April 6, 2015*

**english**

no they weren't! these are the correct responses to that: 2. A 3. D 4. A
*April 6, 2015*

**math**

A nickel is 1/16 of an inch thick.Carrie has 7 nickels,what is the thickness of her 7 nickels?
*April 6, 2015*

**english**

The answer is d her
*April 6, 2015*

**Math**

A back-to-back stem-and-leaf plot showing the points scored be each player on two different basketball teams is shown below. Team 1 | | Team 2 6 1| 0| 3 7 8 4 2| 1|4 6 8 9 9 6 3| 2|5 7 Key: 4|0|2 means 4 points for Team 1 2points for team 2 What is the median number of points ...
*April 6, 2015*

**Math**

Chocolate chip: Adults=5 Children=10 Peanut butter: Adults=8 Children=6 Oatmeal: Adults=7 Children=4 What percentage of the children chose penut butter? A. 70% B. 25% C. 30% D. 45% Is the answer B? Thank you
*April 6, 2015*

**Math**

So a. right! I thought that 1st after i calculated it then i thought I was wrong!
*April 6, 2015*

**Math **

Lisa takes a loan of $10,500 at a 9% simple interest rate for 7 years. a. How much interest will she pay after 3 years? b. how much interest will she pay in total for the loan? a. $2,835.00; $6,615.00 b. $8,280.00; $9,720.00 c. $13,598.00; $19,194.00*** d. $28,350.00; $66,150.00
*April 6, 2015*

**physics**

an 83.2 kg girl is standing on a frictionless ice surface through a 2.00 kg book at 12.6 m/s at what velocity does the girl move across the ice?
*April 6, 2015*

**Math**

I understand now thank you.
*April 6, 2015*

**Math**

A survey of 594 studnets about the sports program at a school finds the following results: 495 students like the program 99 students think the program is inadequate. If a circle graph were made from the data, what would the measure of the central angle be for the group that ...
*April 6, 2015*

**English**

I don't have text for this; it's a research assignment. I'll check out the links. Thanks to both!
*April 6, 2015*

**English**

What aspects of Langston Hughes's poetry did people not like in general?
*April 6, 2015*

**Math**

Find the next three terms sequence. -2,-12,-72,-432,.... A. -1,728, -6,912, -27,648 B. -1,728, -10,368, -62,208*** C. -2,592, -10,368, -41,472 D. -2,592, -15,522, -93,312 ASAP is good, but if not no prob!
*April 6, 2015*

**Math**

Oh Im sorry I was in a hurry to post the question because my computer keeps turning off when I barely turn it back on. Thank you for your help.
*April 6, 2015*

**Math**

Carol has a collection of 100 stamps. The graph below shows the percentage of stamps she has from each country. France=24% Italy=25% England=22% Norway=29% How many of Carol's sta,ps are from Noraw than from France? A. 5 stamps B. 24 stamps C. 29 stamps D. 53 stamps Is the...
*April 6, 2015*

**French**

Yes, but is it grammatically correct?
*April 6, 2015*

**French**

Is this sentence correct? J'adore quand il fait chaud.
*April 6, 2015*