Saturday

December 10, 2016
Total # Posts: 103,307

**Algebra**

a projectile is laucnhed from the ground level and its height can be modeled as a function of time by the equation h=4-t-50t^2 What are the reasonable domain and range of this problem

*December 10, 2016*

**Check Answer!! math**

A test was given to a group of students. The grades and gender are summarized below A B C Total Male 7 14 11 32 Female 15 13 16 44 Total 22 27 27 76 If one student is chosen at random from those who took the test, Find the probability that the student was male GIVEN they got a...

*December 10, 2016*

**Algebra**

A projectile is launchedf rom ground level and its height can be modeled as functions of time by the equation h=40t-5t^2 What are the reasonable domain and range of this problem situation

*December 10, 2016*

**Algebra**

x^2-12x=-36 I got x=-6

*December 10, 2016*

**Algebra**

How long is the ball in the air before it hits the ground

*December 10, 2016*

**Algebra**

a ball is dropped from a 50 meter cliff and its height h above the ground at any time ti is given by thte equation h(t)=50-4.9t^2

*December 10, 2016*

**Math**

1. For a particular year, a company has gross annual income of $780,000, annual expenses of $270,000, and allowed depreciation of $60,000. The company is located in a state where the first $200,000 corporate income is tax-free, and any income above that is taxed at a State ...

*December 10, 2016*

**Algebra**

In the mall you receive a coupon for 5 dollars off a pair of jeans. When you arrive at the store you find that all jeans are 25 percent off Let x represent the original cost of the jeans 18a.Write a function F(x) that represents the effect of your original coupon 18b. Write a ...

*December 10, 2016*

**Algebra**

|1-4k| ? -11 Solve

*December 10, 2016*

**Algebra**

Can you PLEASE help me with this Algebra problem: In a hotel conference room, the number of chairs is 47 more than the number of people currently in the room. The total number of legs currently in this room is 938. What is the sum of the digits in the number of people ...

*December 10, 2016*

**Maths**

Mona's father is thrice as Mona after 12 years his age is just twice of his daughter find their present age?

*December 10, 2016*

**college statistic **

A study was done on skull sizes of humans during different time periods. The results are shown in the table. Assume that the two samples are independent simple random samples selected from normally distributed? populations, and do not assume that the population standard ...

*December 10, 2016*

**Physics **

A cheeta can run with a speed of 29 m/s. Determine the distance travelled by a running cheetah in 8.6 s. D= 29/8.6 = 3.3s

*December 9, 2016*

**system of equations **

Write the system of equations as an augmented matrix. Then solve for x and y. 5x-3y=-34 10x?5y=?65

*December 9, 2016*

**Annuities**

You deposit $4000 each year into an account earning 6% interest compounded annually. How much will you have in the account in 30 years?

*December 9, 2016*

**Business Finance**

Calculate the present value, at an interest rate of 6% per annum, of a cash flow of $20,000 due in 25 years (to 2 decimal places).

*December 9, 2016*

**math**

for the first one is it 1/2b

*December 9, 2016*

**math**

i meant simplify

*December 9, 2016*

**math**

sorry i meant to just show how its supposed to be soled

*December 9, 2016*

**math**

1\frac{1}{5}m^{4?n}·0.5m^{n?6} this one also stumped me i can't find any way to solve it can you guys show me how to do it and give me the answer it would be real help! :)

*December 9, 2016*

**math**

(0.08b^{4m+8})\div (18b^{m?2}) this broil confuses me, can u guys plz show how its solved but not give me the answer

*December 9, 2016*

**precalculus**

Given: r = 4/-2-6sintheta What is the eccentricity of the function? ________________________________________ 2 -2 3 -3

*December 9, 2016*

**precalculus**

Convert to Rectangular: r*tan?/sec?=2 ________________________________________ y=2 y=½ x=2 x=½

*December 9, 2016*

**physics**

A golfer tees off and hits a golf ball at a speed of 31 m/s and at an angle of 35 degrees. What is the horizontal velocity component of the ball? Round the answer to the nearest tenth of a m/s.

*December 9, 2016*

**math**

find the length of the longest diagonal through a cuboid of sides 4cm by 13cm by 16cm. please show working

*December 9, 2016*

**philosophy**

Does one ever truly find happiness?

*December 9, 2016*

**Science**

the amount of pollution produced by cars was measured for cars using gasoline containing different amounts of lead. What is the independent variable

*December 9, 2016*

**Algebra**

The trail is 2493 miles long. It begins in city A and ends in city B. Manfred has hiked 2/9 of the trail before. How many miles has he hiked?

*December 9, 2016*

**Biochem**

Use the Henderson-hasselbach equation and solve for the ratio at each pH. Basic amino acids are histidine, arganine, and lysine.

*December 8, 2016*

**Math**

Still need help with this one: Find the work done in pumping the water over the rim of a tank that is 40 feet long and has a semicircular end of radius 10 feet if the tank is filled to a depth of 4 feet. I've set up an integral that is: 62.4 ? [-10,-4] 80 sqrt(100-y^2)(-y)...

*December 8, 2016*

**chem**

thanks i appreciate it

*December 8, 2016*

**chem**

They just tell me the eq pressure is 3 atm for the sample and ask for Keq. Here's the rxn... NH2COONH4(s) --> 2NH3(g) + CO2(g) Choices... A)4 B)1/27 C)4/27 D)27

*December 8, 2016*

**chem **

i feel like none of these answers are right. if the solubility of the solid is 'S' mol/ L, what is the Ksp of the product of the salt? Ca3PO42-(s) --> 3Ca2+(aq) + 2PO42- (aq) A)ksp=S^2 B)ksp=4S^3 C)ksp=27S^4 D)ksp=108S^5 Only leaning towards D because its the only ...

*December 8, 2016*

**Math**

Find the work done in pumping the water over the rim of a tank that is 40 feet long and has a semicircular end of radius 10 feet if the tank is filled to a depth of 4 feet

*December 8, 2016*

**chemistry ksp **

i feel like none of these answers are right. if the solubility of the solid is 'S' mol/ L, what is the Ksp of the product of the salt? Ca3PO42-(s) --> 3Ca2+(aq) + 2PO42- (aq) A)ksp=S^2 B)ksp=4S^3 C)ksp=27S^4 D)ksp=108S^5 Only leaning towards D because its the only ...

*December 8, 2016*

**chemistry **

how do you calculate the equilibrium constant K for a reaction given only the equilibruim pressure for the sample...i thought u needed partial pressures for all substances involved. They just tell me the eq pressure is 3 atm for the sample and ask for Keq. Here's the rxn...

*December 8, 2016*

**math**

The number of employees at a plant continually fluctuates. One month started at 568. Then 102 employees were hired, and the next 57 employees were displaced. If the plant then plans to add 10% more employees, how many will it have?

*December 8, 2016*

**calculus**

A paper clip is dropped from the top of a 144?ft tower, with an initial velocity of 16 ft/sec. Its position function is s(t) = ?16t^2 + 144. What is its velocity in ft/sec when it hits the ground? –96 –64 –32 0

*December 8, 2016*

**calculus**

The position function for a particular object is s = â€“23t^2 + 65. Which of the following statements is true? The initial position is 23 The initial velocity is 0 The velocity at time t = 1 is 42 None of these

*December 8, 2016*

**calculus**

Find the local linear approximation of f(x) = e^(3x) at x = 1. y = e^3 y = e^(3(x ? 1)) y = 3e^(3)(x ? 1) y = 3e^(3)x ? 2e^3

*December 8, 2016*

**calculus**

Rolle's theorem cannot be applied to the function f(x) = x^1/3 on the interval [–1, 1] because... f is not differentiable on the interval [–1, 1] f(–1) ? f(1) f is not differentiable on the interval [–1, 1] and f(–1) ? f(1) Rolle's theorem can ...

*December 8, 2016*

**calculus**

For the function f(x) = 20x^3 ? 3x^5, determine the interval(s) for which f(x) increases. (–2, 2) (–?, –2) U (2, ?) (–2, 0) U (2, ?) (–?, –2) U (0, 2)

*December 8, 2016*

**calculus**

Find limit as x goes to infinity of (6x-(1/4x))/(3x-(1/x))? one half –4 negative one fourth 2

*December 8, 2016*

**calculus**

If the local linear approximation of f(x) = 2cos x + e2x at x = 2 is used to find the approximation for f(2.1), then the % error of this approximation is... greater than 15% between 11% and 15% between 5% and 10% between 0% and 4%

*December 8, 2016*

**(-?- )?**

I agree ur asking us the answers to a test????!! that's sort of what I would call CHEATING.

*December 8, 2016*

**Gifted Literature**

What traditions have grown around baseball, and how do they affect the people who play and love the game?

*December 8, 2016*

**calculus**

Rolle's theorem cannot be applied to the function f(x) = x1/3 on the interval [–1, 1] because Answer Choices: f is not differentiable on the interval [–1, 1] f(–1) ? f(1) f is not differentiable on the interval [–1, 1] and f(–1) ? f(1) Rolle's ...

*December 8, 2016*

**calculus**

A particle moves along the x-axis so that at time t its position is given by s(t) = (t + 3)(t ?1)^3, t > 0. For what values of t is the velocity of the particle decreasing? 0 < t < 1 t > 1 t > 0 The velocity is never decreasing

*December 8, 2016*

**Electrical Circuits**

A length of copper telephone line has a resistance of 24? at 20 degree Celsius. What it its resistance on a hot summer day when its temperature rises to 36 degree Celsius.

*December 8, 2016*

**Science physics**

How would the voltage output be affected if the armature is made to spin faster?

*December 8, 2016*

**Algebra II**

Solve the following word problem. The length and width of a rectangle are (x + 4) cm and x cm. Respectively, a square has the same perimeter as this rectangle. If you add the areas of the rectangle and the square, the result is 94cm^2. Solve for x. Note: Write your answer as x...

*December 8, 2016*

**math**

Chris puts one tenth of each paycheck into savings. Her current paycheck is $200. She decides to also put into savings, any amount she earns over $200. The expression below represents the percent of her paycheck that Chris saves when she makes x dollars more than her current ...

*December 8, 2016*

**Math**

7 1/8 pounds

*December 7, 2016*

**WSJE**

Hannah and leah are running around circular track. Hannah takes 5 minutes to complete one lap, and leah takes 6 minutes to complete one lap. If they both start at the same time and from the same point, they will be together at the starting point and then again after ___ minutes.

*December 7, 2016*

**English**

It doesn't help. Plus I've put couple of the thesis statement but nobody told me if that is a good thesis statement. I said, "Can Usher Syndrome be cure"? Or "What are some treatments that can cure Usher Syndrome"?

*December 7, 2016*

**English **

I'm doing a paper about Usher Syndrome and am having a hard time thinking about a thesis statement. I already have my paper typed up but can't think what to write as my thesis statement. Any examples would help to get my mind going. The source online about thesis ...

*December 7, 2016*

**Operating System Application**

Growth of the size in main memory

*December 7, 2016*

** Measures of Central Tendency**

The table below shows the scores of a group of students on a 10-point quiz. Test Score Frequency 3 1 4 3 5 1 6 1 7 0 8 3 9 4 10 3 The mean score on this test is: The median score on this test is:

*December 7, 2016*

**chemistry**

How many grams of water and how many grams of 85 wt% phosphoric acid would be needed to make 100 grams of 37 wt% phosphoric acid solution?

*December 7, 2016*

**Math**

Thank you for the help Damon, I'm sorry for not getting the answers right I just found out my grandma has cancer and have been staying with her at the hospital recently so I have been having a little trouble.Thank you for showing me how to get it step by step.

*December 7, 2016*

**Math **

Write an equation for the line that is parallel to the given line and passes through the given point. y=3x+4;(6,8) A. y=3x-10 B. y=3x+6 C. y=-3x+6 D. y=-1/3x-6 Tell whether the lines for each pair of equations are parallel, perpendicular, or neither. y=-3x+7 -2x+6y=3 A. ...

*December 7, 2016*

**Chem**

Positron Decay When positron decay occurs a _____ transform into a _____ and a positive ______ (_____). The positron is emitted and the ____ remains in the nucleus proton, nucleus Idk the other 3.

*December 7, 2016*

**Math**

What is the constant rate of change

*December 7, 2016*

**chem check**

The vapor pressure of a solution prepared by mixing two liquids, R, p*=80mmHg, and S, p*=120mmHg is found to be 86 mmHg when X_r=0.4. Which of the following is correct about these solutions? A) exhibit favorable interactions B) are partially miscible ****** C) boil more ...

*December 7, 2016*

**Math**

How do u find it with a table

*December 7, 2016*

**Physics**

You exert a horizontal force of 200 N to pull a 10-kg box across the floor. If the coefficient of kinetic friction between the box and the floor is .42, what is the acceleration of the box?

*December 7, 2016*

**math**

Your office manager used 45 paperclips for handouts at his presentation from the 450 paperclips available in the stock room. What percentage of the original number of paperclips did NOT get used?

*December 7, 2016*

**English**

I just can't get it. I've tried to think of something. Can you give me an example so it can get me thinking

*December 7, 2016*

**English**

I am talking about the symptoms, diagnosis, types of Usher Syndrome, how it changed, and how it affect hearing loss and loss of vision

*December 7, 2016*

**English **

What would be some great thesis statement examples about Usher Syndrome? I have one, but I would like to see more. Any help would be greatly appreciated

*December 7, 2016*

**Homework**

Hi, I need help with my homework, the homework is about multistep, I'm having issues with this subject and I need help.

*December 7, 2016*

**chem check **

The vapor pressure of a solution prepared by mixing two liquids, R, p*=80mmHg, and S, p*=120mmHg is found to be 86 mmHg when X_r=0.4. Which of the following is correct about these solutions? A) exhibit favorable interactions B) are partially miscible ****** C) boil more ...

*December 7, 2016*

**History **

When President George Washington suppressed a rebellion of farmers in Western Pennsylvania for refusing to pay the whiskey tax, he?

*December 7, 2016*

** simple interest**

If you would like to make $1213 in 8 years, how much would you have to deposit in an account that pays simple interest of 5%?

*December 7, 2016*

**English**

Can Usher Syndrome be cured? How about that?

*December 7, 2016*

**English**

Scientist is researching Usher Syndrome to see if Usher Syndrome can be cured. Is that good?

*December 7, 2016*

**English**

How about, Usher Syndrome is a serious condition that affects both hearing and eyesight and needs to have more treatment? Is that alright?

*December 7, 2016*

**English **

What would some of great thesis statement examples about Usher Syndrome? I have one, but I would like to see more. Any help would be greatly appreciated

*December 7, 2016*

**Science**

Recall from previous activities in this lesson which era is sometimes referred to as the Age of Mammals. Locate and click on this section of the geologic time scale, and list the other possible names that could have been used to describe this era, and why.

*December 7, 2016*

**Check Answer!!**

You deposit $4,300 in an account earning 3.5% interest compounded semiannually. How much will you have in the account after 9 years? 4300(1+.035/2)^(2x9) ~~ 5876.08

*December 7, 2016*

**Chemistry**

The O's are supposed to be under both the C's

*December 7, 2016*

**Chemistry**

Draw and repeat unit for a reaction product of glycol: HO-CH2-CH2-CH2-CH2-OH with the following carboxylic acid: HO-C-CH2-CH2-C-OH = = O O

*December 7, 2016*

**Physics**

Chameleons catch insects with their tongues, which they can extend to great lengths at great speeds. A chameleon is aiming for an insect at a distance of 22 cm. The insect will sense the attack and move away 60 ms after it begins. In the first 60 ms, the chameleon’s ...

*December 7, 2016*

**Language Arts**

I began a written correspondence with my grandmother when I was a young child. We did not live within visiting distance, and writing was a way for us to “visit” each week. Sunday was the day she would rest from her labors on the farm. Taking her dime store pad of ...

*December 7, 2016*

**Language Arts**

While television can be entertaining and educational, it also has a dark side, especially for children. On average, children spend nearly 4 hours a day watching television. The harmful effects of television viewing far outweigh any benefits. Doing poorly in school is one ...

*December 7, 2016*

**Check Answer!!**

A=P(1+r/n)nt

*December 7, 2016*

**Check Answer!!**

You deposit $4,600 in an account earning 2.5% interest compounded quarterly. How much will you have in the account after 8 years? (Note: Use n=12 for monthly compounding, n=4 for quarterly compounding, n=2 for semiannual compounding, and n=1 for annual compounding.) 5082.31

*December 7, 2016*

**Chemistry**

A certain substance has a heat of vaporization of 62.08 kJ/mol. At what Kelvin temperature will the vapor pressure be 4.50 times higher than it was at 361 K? I've gotten it to the point of: ln(4.50)=7466.47423176378616 K (1/361 - 1/T2) Solving for T2 but I don't know ...

*December 7, 2016*

**Chemistry**

Can anyone help?!

*December 7, 2016*

**Chemistry**

I just need some ideas of what to put for these on my homework examples for extra credit Name a molecule that has: A) Tetrahedral Geometry B) Trigonal planar geometry C) Linear Geometry D) Bent Geometry

*December 7, 2016*

**algebra 1**

Name the point of intersection for the following system, if it exists. 4x â€“ 3y = -3 3x â€“ y = -6

*December 7, 2016*

**pre calculus**

Explain how you sketch a plane curve given by parametric equations? What is meant by the orientation of the curve?

*December 7, 2016*

**Maths**

An auditorium has 600 seats.2/3 of the seats are empty.how many seats are empty

*December 7, 2016*

**Science**

1) What physical features do producers and consumers have to help them survive in their environment

*December 6, 2016*

**Science**

What are examples of first, second and third level consumers in the Chesapeake Bay?

*December 6, 2016*

**chemistry**

In a calorimetry experiment, 2.14 g of NH4Cl is dissolved in 100.0 mL of water. The temperature drops by 1.43°C. Calculate the molar heat of solution for NH4Cl.

*December 6, 2016*

**math**

In a load of 3/4 tons of steel roda.1/8 of them are bent. How many steel rods are bent?

*December 6, 2016*

**math**

In a load of 3/4 tons of steel roda.1/8 of them are bent. How many steel rods are bent?

*December 6, 2016*

**Calculus**

Find the open intervals on which f(x) = -6x^2 + 96x + 7 is increasing or decreasing. a. increasing on (-inf, 16); decreasing on (16, inf). b. increasing on (-inf, 14); decreasing on (14, inf). c. increasing on (-inf, 84); decreasing on (84, inf). d. increasing on (-inf, 56); ...

*December 6, 2016*

**Math**

Thank you so much Damon.

*December 6, 2016*