Sunday

December 11, 2016
Total # Posts: 2,394

**physics**

calculate the net force required to give a 3000kg trucks an acceleration of 2.5m/s^2

*June 18, 2016*

**Calculus- PLEASE HELP**

A rectangular piece of tin has an area of 1334 square inches. A square tab of 3 inches is cut from each corner, and the ends and sides are turned up to make an open box. If the volume of the box is 2760 cubic inches, what were the original dimensions of the rectangular piece ...

*June 14, 2016*

**Calculus**

A rectangular piece of tin has an area of 1334 square inches. A square tab of 3 inches is cut from each corner, and the ends and sides are turned up to make an open box. If the volume of the box is 2760 cubic inches, what were the original dimensions of the rectangular piece ...

*June 13, 2016*

**Calculus- Reiny **

Thanks for the help, but do you understand what Im suppoosed to graph on 2D d) Use a graphing calculator to sketch the graph of y = V(x). Use the viewing window [0, 24, 4] by [-2500, 4000, 500]. Then use the 2 nd – TRACE – maximum feature to calculate its maximum ...

*June 13, 2016*

**Calculus- Reiny **

Thanks for the help, but do you understand what Im suppoosed to graph on 2D d) Use a graphing calculator to sketch the graph of y = V(x). Use the viewing window [0, 24, 4] by [-2500, 4000, 500]. Then use the 2 nd – TRACE – maximum feature to calculate its maximum ...

*June 13, 2016*

**Calculus**

A rectangular piece of tin has an area of 1334 square inches. A square tab of 3 inches is cut from each corner, and the ends and sides are turned up to make an open box. If the volume of the box is 2760 cubic inches, what were the original dimensions of the rectangular piece ...

*June 13, 2016*

**math**

Would it be: (-1, 14) and (6,7)?

*June 13, 2016*

**math**

I'm still pretty lost.. :/

*June 13, 2016*

**math**

what are the solutions to the system? y=x^2 - 6x+7 y=-x+13

*June 13, 2016*

**Chemistry**

A Chemist wanted to determine the percentage of calcium carbonate in a sea shell. He collected a number of sea shells which he crushed into a fine powder. To 2.65 grams of sea shell powder he added 25.0mL of 5.0M Hydrochloric acid. When all the fizzing ceased, he filtered the ...

*June 13, 2016*

**math/algebra**

thank you so much. I thought so.

*June 9, 2016*

**math/algebra**

The surface area of a rectangular prism is SA=2lw+2wh+2lh. The volume of a rectangular prism is V=lwh. Write an expression for the ration of surface area to volume.

*June 9, 2016*

**chemistry**

Chromium (III) iodate has a Ksp at 25°C of 5.0 x 10–6. 125 mL of a solution contains 0.0050 mol L–1 Cr (III) ion. When 75.0 mL of the NaIO3 solution have been added, what is the concentration of the Cr(III) ion remaining in solution? not sure how ...

*June 9, 2016*

**chemistry**

The Kb of ammonia is 1.8 x 10–5. What is the percent ionization of a solution of ammonia, 0.50 mol L–1 NH3, that contains 0.020 mol L–1 of ammonium nitrate, NH4NO3? when i use the ICE table i don't end up with an unknown so im not sure what to...

*June 9, 2016*

**chemistry**

thank you! :)

*June 8, 2016*

**chemistry**

At equilibrium, a solution of formic acid at 25°C has a pH of 2.18. The pKa of formic acid, HCOOH, is 3.74. Which of the following is the initial concentration of the solution? Not sure what to do my thoughts: use henderson hasselback equation pH = pKa + log [conj ...

*June 8, 2016*

**statistics**

the amount of pyridoxine in grams per multiple vitamin is normally distributed with mean = 110 grams and standard deviation = 25 grams. What is the probability that a randomly selected vitamin will contain between 100 and 110 grams of pyridoxine?

*June 3, 2016*

**algebra**

y varies inversely with x, and y = 10 when x = 2. What is the equation for the inverse variation?

*June 3, 2016*

**Chemistry**

When the ratio of neutron-to-proton dictates that a neutron must break down it will form a helium nucleus an alpha particle a proton and an electron*** Two protons

*June 1, 2016*

**Chemistry**

Which of the following materials is necessary to stop gamma radiation one foot of concrete single sheet of paper thin pieces of wood three inches of lead***

*June 1, 2016*

**Math**

vvvvvvvvvvvvvb

*May 29, 2016*

**Math**

hi

*May 29, 2016*

**Calc**

Find the number b such that the line y = b divides the region bounded by the curves y = 4x2 and y = 16 into two regions with equal area. (Round your answer to two decimal places.)

*May 27, 2016*

**math or algebra **

F2088nd the next three terms of the sequence. -2, -12, -72, 432. Possibilities are: 1. -1728 -6912 -27,648 2. -1728 -10,368 -62,208 3. -2592 -10,368 -41,472 4. -2,592 -15,552 -93,312 I have tried multiplying positive numbers times the negative but can't make the numbers ...

*May 22, 2016*

**MATH HELP !!!!!**

I know a fraction is the answer but can't make it work for the probability question asking for what is the chance you will pull a pink eraser out of a,container that has 5 green .2 striped.4 pink.and 3 white.?

*May 19, 2016*

**Math**

5 HOURSS IS THE ANSWER

*May 16, 2016*

**Math**

answer

*May 16, 2016*

**Math**

Square is 20 feet wide and 21 feet long what is the disdence from one corner to the other

*May 15, 2016*

**physics**

Three point charge of 2NC 7NC and - 4NC are located at the corners of an equilateral triangl as shown below. Caculate the magnitude and direction of the net force on the 7uc charge.

*May 9, 2016*

**physics**

Three point charge of 2NC 7NC and - 4NC are located at the corners of an equilateral triangl as shown below. Caculate the magnitude and direction of the net force on the 7uc charge.

*May 9, 2016*

**algebra**

a student measures the height of a sign to be 2 meters. the shadow of the sign 3 meters. the student notices that at the same time nearby tree has a shadow of 15.6 meters. how tall is the tree? What equation would be used for this?

*May 5, 2016*

**Chemistry **

Calculate the ph of a solution that is 0.157m HCI?

*May 4, 2016*

**LA**

Anonymous is right thanks

*May 4, 2016*

**Math**

Two telephone poles are 60ft. apart, and one of them is 6ft. higher than the other. If the length of the wire between the poles is 61.3 ft., how much wire was allowed for sag?.

*April 30, 2016*

**Life orientation**

zuma's career! I hope this helped you on you're homework!

*April 27, 2016*

**Math**

To do this, you have to factor the radicand (or the number inside the radical sign) and look for perfect squares. For instance, 2 * √(48) 2 * √(16*3) 2 * √(4*4*3) Express the repeating factors using exponents, so it's easier to see. Since four is ...

*April 27, 2016*

**Life Orientation**

The 'disappearances' of detainees in the custody of Russian federal forces in Chechnya is a major human rights crisis that the Russian government and the international community must address." "While combat between federal forces and Chechen rebels has for ...

*April 27, 2016*

**Math(Radicals)**

I hope this helps! √≈1.7320508075688772

*April 27, 2016*

**ELA**

Maybe, don't frown mr brown

*April 25, 2016*

**ELA**

My little brown trout

*April 25, 2016*

**L.o**

I need the answers

*April 25, 2016*

**math**

Create sketches by hand of the following sine functions, showing at least one full period and state the domain and range. Submit them to your teacher using the drop box above. It may be easiest for you to scan your hand drawn sketches and submit the scan file. Part A: ...

*April 25, 2016*

**statistics**

the marks of 100 students in an examination are normally distributed with mean of 25 marks and a standard deviation of 10 marks. Given that the pass mark is 20, estimate the number of students who passed the examination.

*April 24, 2016*

**PROB**

What is minimum sample needed if you know the SD is 22.36 and an accuracy of 3.06 and you want a confidence level of 90%

*April 24, 2016*

**Math, NEEDS HELP EMEDIETLY!**

the sample size is 144

*April 22, 2016*

**algebra**

Never mind. I figured this one out on my own!

*April 20, 2016*

**algebra**

16oz of nails is to be made of a combination of nails one that costs four dollars per oz and another that costs eight dollars per oz. How many oz of each kind of nails would you need to equal 16oz of a mixture of nails that costs seven dollars per pound? What formula would I ...

*April 20, 2016*

**Calculus **

Equation: Suppose that the demand of a certain item is x = -0.7 p + 20. Evaluate the elasticity at E = 8. I'm not sure what steps to take to solve this. I know that elasticity is equal to the absolute value of [(p/q) x (dp/dq)]

*April 19, 2016*

**MATH**

whats the answer

*April 18, 2016*

**math**

ms sue how is it 16 ??

*April 12, 2016*

**Physics**

An electron is held 2.10 cm from an vertically aligned infinite charged plane and then released from rest. It accelerates toward the plane to the left and collides with a speed of 1.50×107 m/s .

*April 11, 2016*

**VISUAL BASIC PROGRAMMING**

3. WRITE A VISUAL BASIC PROGRAM TO CALCULATE THE SIMPLE INTEREST ON A LOAN AMONUT OF 50000 GHANA CEDIS AT AN INTEREST RATE OF 30% FOR A NUMBER OF YEARS WHICH WILL BE SPECIFIED BY THE USER.

*April 2, 2016*

**Math**

B because 4/52 is about 0.76

*March 30, 2016*

**Business Math**

The Principal of SACRO Primary is concerned that the average speed of cars travelling along Princess Road exceeds the recommended speed of 60km/h. A random sample of 10 cars had their speeds measured by radar and the results (in km/h) are as follows: 81, 53, 62, 79, 52, 68, 61...

*March 30, 2016*

**physics**

By looking at the sinusoidal wave graphed out, the period is T=1.0s. Which means in one second the d will be the same as the beginning. So we know that d0=2.0cm so d4 at 1.0s = d0 or 2cm. Then we know that half of that period would be the negative of the intial or d2 at .5s= -...

*March 30, 2016*

**us history**

I think it is B because the Declaration of Sentiments was published during the convention.

*March 29, 2016*

**us history**

I agree with B because it says best and all the other choices only described part of her career.

*March 29, 2016*

**us history**

Hello Think of what the word conversion means. It doesn't have to do with land areas or just one religion, it could be another beside Christianity, but Christianity was the main one. So now, what do you think?

*March 29, 2016*

**physics**

A laser beam passes from air into a 25% glucose solution at an incident angle of 37 ∘ . In what direction does light travel in the glucose solution? Assume the index of refraction of air is n = 1.

*March 27, 2016*

**math**

Alex is right- it is 9- look at his answer!! Guess it shows how sometimes kids are smarter than grown-ups!

*March 27, 2016*

**Science: Physics**

mr. slott at his fighting weight of 1000N jumps down from a platform meters above a trampoline with a spring constant (k) of 500N/M. How much does Mr.Slott strech the trampoline (x) before it brings him to a stop

*March 15, 2016*

**Math**

25% of 20% = 8 so, 5% =8 10% = 16. 16 x 10 = 160

*March 14, 2016*

**Social Studies HELP**

2. Which was a part of the Populist Party’s platform? (1 point) tax breaks for farmers*** civil rights for all Americans higher tariffs on foreign goods increased industrial development 3. Whom did Rebecca Latimer Felton replace when she was appointed a senator in the ...

*March 10, 2016*

**math111**

in a science class,65 student study physics while 40 study chemistry.if there are 93 student in the class,how many student study both physics and chemistry?

*March 10, 2016*

**physics**

Three sheets of plastic have unknown indices of refraction. Sheet 1 is placed on top of sheet 2, and a laser beam is directed onto the sheets from above. The laser beam enters sheet 1 and then strikes the interface between sheet 1 and sheet 2 at an angle of 19.8° with the ...

*March 9, 2016*

**math**

A 100-cm board is cut into two pieces. If one piece is 30 cm shorter than the other, how long are the two pieces?

*March 9, 2016*

**chemistry**

Calculate the change in pH when 9.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq). Calculate the change in pH when 9.00 mL of 0.100 M NaOH(aq) is added to the original buffer solution.

*March 9, 2016*

**Social Studies**

2. The new boundary line set by the Adams-Onis Treaty had which of these effects? A.) It created a system of dual governance in Florida. B.) It represented the completion of Manifest Destiny.**** C.) It began the decline of Spain's New World empire. D.) It allowed the ...

*March 9, 2016*

**Math. Pls. Help!**

What do you think it is?

*March 9, 2016*

**Law**

Which of the following constitutional provisions place(s) restrictions on identification procedures?

*March 8, 2016*

**Science**

You are correct.

*March 8, 2016*

**algebra**

What do you mean?

*March 8, 2016*

**algebra**

Does the table represent an exponential function? x | 1 | 2 | 3 | 4 y | -2 | -12 | -72 | -432

*March 8, 2016*

**identity theft**

B. If you throw away paperwork with personal information on it without shredding it, you risk someone finding it.

*March 8, 2016*

**Mathematics**

The gradient of a curve is defined by dy/dx = 3x^(1/2) - 6 Given the point (9, 2) lies on the curve, find the equation of the curve

*March 8, 2016*

**Maths**

The gradient of a curve is defined by dy/dx = 3x^(1/2) - 6 Given the point (9, 2) lies on the curve, find the equation of the curve

*March 7, 2016*

**geomentry**

find the area of each circle to the nearest tenth with diameter of 8ft.

*March 2, 2016*

**math**

My sister is 9 1/2 years old my brother is 4 3/4 years younger than my sister how old is my brother show me how to get the answer

*March 1, 2016*

**Physics**

You are on vacation in San Francisco and decide to take a cable car to see the city. A 5500 kg cable car goes 360 m up a hill inclined 19 ∘ above the horizontal. What can your learn about the work done by the cable to move car up the hill? Answer quantitatively. Ignore ...

*February 29, 2016*

**Please check Ms. Sue on math!**

you have to do 7*4 and get 28 so yes u are correct

*February 26, 2016*

**Please check Ms. Sue on math!**

your right

*February 26, 2016*

**Someone Please Check My Answers?!?!?**

Is 20 D instead? Sorry for wasting your time this is my last question on my homework and i'm stuck. This was actually make up work i was out for 3 days

*February 26, 2016*

**Someone Please Check My Answers?!?!?**

18. Which action during westward expansion had the most negative impact on the lives of slaves? A.) The Fugitive Slave Act**** B.) The Mexican-American War C.) The Treaty of Washinton D.) The Missouri Compromise 19. Which answer best describes why towns and cities were built ...

*February 26, 2016*

**Ms. Sue Please Check My Answers!**

15. C 16. D 17. A If not then I give up and im just going to guess

*February 26, 2016*

**Chemistry **

A chemist needs a 50% of sulfuric acid. She mix 2 liters of 20% of sulfuric acid with a sample of 60% of sulfuric acid. Write a equatoin that models the situation and use it to find how much the 50% of the sulfuric acid she needs to use?

*February 25, 2016*

**Mathematics**

How do you find the coordinates of the stationary points to this implicit differentiation equation? x^2y = y^2 + 2x 2xy + x^2yy' = 2yy' + 2 y'(x^2y-2y) = 2-2xy y' = 2(1-xy) ------------- y(x^2-2)

*February 25, 2016*

**Mathematics**

x^2(y) = y^2 + 2x What is dy/dx and the coordinates of the stationary points

*February 25, 2016*

**Mathematics**

The equation of a circle is given by D: x^2 + y^2 - 2x - 4y - 20 = 0 Use implicit differentiation to find the equation of the normal D at the point S(5, -1)

*February 25, 2016*

**math. metric system**

To convert from a smaller unit to a larger unit you divide or multiply or add by 10 ?

*February 25, 2016*

**chemistry **

Write the chemical equation that oxidize oxalic acid to carbon dioxide and water

*February 25, 2016*

**Math**

The planning committee for the upcoming school play “Miss-terious” at LMSA asked the mathematics classes to give them some estimates about income that could be expected at different ticket price levels. The class did some market research to see what students would be...

*February 24, 2016*

**Math**

if f be a function such that d/dx[x^2+1)f(x)]=2xf(x)+3x^4+3x^2 what is f(x)?

*February 23, 2016*

**Math**

/x^2-6x/=9

*February 21, 2016*

**Math **

How many solutions are there to the equation |x^2-6x|=9?

*February 21, 2016*

**related rates word problems**

"A man of height 2.2 meters walk away from a 5-meter lamppost at a speed of 1.2 m/s. Find the rate at which his shadow is increasing in length. " what is the answer to this? if anyone can help that would be great

*February 20, 2016*

**math**

billy is good

*February 19, 2016*

**chem**

Carbon dioxide gas has a Henry's law constant of 4.48×10-5 M/mmHg at 25.0 °C when dissolving in water. If the total pressure of gas (CO2 gas plus water vapor) over water is 1.00 atm, what is the concentration of CO2 in the water in grams per milliliter? Pressure ...

*February 18, 2016*

**Physics**

Two speakers, one directly behind the other, are each generating a 264-Hz sound wave. What is the smallest separation distance between the speakers that will produce destructive interference at a listener standing in front of them? Take the speed of sound to be 342 m/s.

*February 5, 2016*

**Chem**

A solution is prepared by adding 1.50 mol glucose to 3.50 mol water. What is the vapor pressure of the solution at 25 oC given that the vapor pressure of pure water is 23.8 torr?

*January 27, 2016*

**math**

20 kids Are in a group . 7 of them have pets. How do u figure what percent of the group has pets? I multiplied 7 X 20 and got 14 percent. Is that the right way to figure percent if u have a total and don't have to use 100 as the total?

*January 25, 2016*