Tuesday

January 17, 2017
Total # Posts: 196

**Math**

The area of an isosceles right triangle decreases at a rate of 5 cm² per second. At what rate is the hypotenuse changing when each of the other sides has length 10 cm? So far I have: Given: dA/dt= 5cm^2/s Find: dH/dt when b&h= 10cm And h= root 200(?)

*November 27, 2016*

**physics**

a bullet of mass 0.05 kg strikes a wooden block of mass 5 kg and becomes embedded within the block. The block and bullet then fly off at 10 m/s after the collision. What was the original velocity of the bullet if the block was initially at rest?

*November 17, 2016*

**Physics**

While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 6.05 m/s. The stone subsequently falls to the ground, which is 12.7 m below the point where the stone leaves your hand. At what speed does the stone impact the ground? How ...

*September 27, 2016*

**math**

3.96 x 10^2/ 1.5 x 10^6

*August 31, 2016*

**math**

3.96 x 10^2/ 1.5 x 10^6

*August 30, 2016*

**Math**

What is the surface area of a pyramid height of 4.5in. and base of 5in.?

*May 23, 2016*

**Math**

What is the surface area of a pyramid with a base of 7cm and height of 9.1cm?

*May 23, 2016*

**Algebra**

8892256699848811007658890087976432766481146649856887666r6596567800098y6646798 E6578893471262

*May 13, 2016*

**Art**

I agree with B.

*April 12, 2016*

**Math**

Turn 11% and 19% to decimals by mutiplying by 100: 11 * 100 = 0.11 19 * 100 = 0.19 Now, add 0.19 and 0.11 together, for the total. = 0.3 0.3 x 900 = 270. 270 people took P.T and Bikes. - This is from MissSmarties/Kaylee

*March 10, 2016*

**Math**

900 people were surveyed on how they get to work in Dallas. Public Transportation- 19% and Bikes 11%. How many people were surveyed that take public transportation and bikes?

*March 10, 2016*

**Chemistry**

What is the volume of 2.0 kg of isopropyl alcohol at 20 degrees Celsius? Density at 20 degrees is 0.785g/ml. I got .00255 ml when using 3 sig figs.

*February 14, 2016*

**Science**

a baseball catcher is catching a fastball that is thrown at 43 m/s by the pitcher. if the mass of the ball is .15 kg and if the catcher moves his mitt backward toward his body by 8 cm as the ball lands in the glove what is the force on the mitt?

*February 10, 2016*

**Math**

At a shoe store, all shoes are on sale for $20 off the regular price. If p represents the regular price, write an expression to represent the sale price.

*January 19, 2016*

**Social studies**

People whom are in alliance are on the same side or purpose. They are called allies. - MissSmarties/Kaylee

*January 12, 2016*

**Social studies**

Thanks

*January 12, 2016*

**Social studies**

What are the groups who are on the same side in a war

*January 12, 2016*

**Art**

Hmm, we can't help, unless you give us insite on how to find it. Ditto on what Reed said.

*December 18, 2015*

**Stats**

A telephone company’s goal is to have no more than five monthly line failures on any 100 kilometres of line. The company currently experiences an average of two monthly line failures per 50 kilometres of line. Let x denote the number of monthly line failures per 100 ...

*November 28, 2015*

**Government**

D

*November 19, 2015*

**Math**

6, 2 x 3 equals 6.

*November 17, 2015*

**civics**

I agree with Ms. Sue. I also presume that they included 'to form a more perfect union', because they don't want that government to turn out like King Arthur's rule. And or emphasis their goal. I HOPE THIS HELPS! - I am taking the same Civics test :p

*November 2, 2015*

**english**

1 is A

*September 23, 2015*

**Math**

Suppose she cut the cake into 8 equal size pieces and 6 people ate all the pieces. Explain how they could have divided the pieces so that everyone ate the same amount of cake. Show work in a drawing

*March 26, 2015*

**Science Help Please**

60%, D. Not bad, lets get those answers in so we can get an A for you :D

*March 13, 2015*

**Science Help Please**

OK, BACK! I GOT THE ANSWERS, I earned a 20/23 on this, and I will now check your answers. By the way, I used my answers, not yours. I don't copy ewe... 1)Correct. 2)Incorrect, it uses absorption. 3)Correct, we went over this in my first post. 5)I picked Amplitude too, but ...

*March 13, 2015*

**Science Help Please**

13) I think it is incorrect, I would need to check my sources and insites first, I will get back to you less than in an hour, :).

*March 13, 2015*

**Science Help Please**

Things that are correct for a fact: 9) Correct, FM stands for frequency module and AM stands for amplitude module. They are named for what they receive. 3) Correct, absorption is the transfer of the energy of a wave to the particles within a medium that causes them to vibrate ...

*March 13, 2015*

**Science Help Please**

Hey, 'Anonymous, I am here to help! 1) Are you doing the work yourself or asking for answers? 2) I will check your answers, but I MAY NOT tell what is correct, just yes or no, because I am working on the same assignment.

*March 13, 2015*

**Spanish**

Need some help with my spanish assignment Complete the following sentences with the correct form of either dar or decir. My answers are in parentheses. I am having trouble, any input is appreciated! 1) Mis amigos (decimos) que hay una fiesta en casa de Pilar este fin de semana...

*March 10, 2015*

**MATH!!!!! NEED HELP NOW !!!!**

gabriel is doing a probability experiment. he is tossing a coin and spinning a spinner with 4 equal sections numbered from 1 to 4. how many possible outcomes are there?

*March 9, 2015*

**Social Studies**

Which of the following is the biggest concern of the neighbors of Israel? OVERPOPULATION URBANIZATION ETHNIC DIVERSITY REFUGEES

*February 20, 2015*

**Science**

Which is not a characteristic of an Igneous rock. An Igneous rock is in other words, a LAVA rock. LAVA has nothing to do with SEDIMENT and LAYERS. Therefore, D is not a characteristic of an Igneous rock. IT is actually a characteristic of a Sedimentary rock. An Igneous rock, ...

*January 15, 2015*

**science**

By the way, Channy-boo, let’s work through this together :). I had the same question, but I figured it out. (By the way, sorry if the answer is a little late, LOL!) OK, first let’s go through the basics. When an atom is radioactive, its nucleus is unstable and it ...

*January 8, 2015*

**science**

He was asking what is the half-life of strontium-decay 90, which, in fact, it has something to do with radio decay. So clearly he did state it clearly, Steve. You should be more sensitive towards others feelings... 'Can you see what a useless question you have posted? ...

*January 8, 2015*

**Math**

Brenda is building a rectangular pen for her dog. She has enough fencing to build the pen so that it has a perimeter of 36 feet. She wants the pen to have an area of 65 ft2. What are the dimensions of the dog pen? A. 5 feet by 13 feet B. 10 feet by 8 feet C. 9 feet by 9 feet D...

*January 3, 2015*

**math**

If the LCM of two numbers is 60, and the difference between the two numbers is 3, what is the pair of numbers?!?!?!?

*November 11, 2014*

**math**

57=(13=x)

*November 11, 2014*

**Physics**

Consider a torque ⃗τ that is constant in both magnitude and direction, and acts on a rigid body of mass 10 kg at a point 1 m from the pivot. How much work does the torque do on the rigid body, if it turns through an angle of 180◦ while the torque is acting? ...

*July 2, 2014*

**Physics**

Given: A flat dance floor of dimensions lx = 24 m by ly =23m and has a mass of M = 1200 kg. Use the bottom left corner of the dance floor as the origin. Three dance couples, each of mass m = 110 kg start in the top left, top right, and bottom left corners. What is the initial ...

*July 2, 2014*

**Physics**

Given: A flat dance floor of dimensions lx = 24 m by ly =23m and has a mass of M = 1200 kg. Use the bottom left corner of the dance floor as the origin. Three dance couples, each of mass m = 110 kg start in the top left, top right, and bottom left corners. What is the initial ...

*July 2, 2014*

**Physics**

A horizontal disk with a radius of 23 m ro- tates about a vertical axis through its center. The disk starts from rest and has a constant angular acceleration of 5.5 rad/s2. At what time will the radial and tangen- tial components of the linear acceleration of a point on the ...

*July 2, 2014*

**Physics**

Consider a torque ⃗τ that is constant in both magnitude and direction, and acts on a rigid body of mass 10 kg at a point 1 m from the pivot. How much work does the torque do on the rigid body, if it turns through an angle of 180◦ while the torque is acting? ...

*July 2, 2014*

**Physics**

A 2.73 kg particle has a velocity of vx = 6.02 m/s and vy = 0.316 m/s. Find the magnitude of its total momentum. Answer in units of kg · m/s

*June 27, 2014*

**physics**

A block of mass 2.5 kg is pushed up against the vertical wall by a force of 60 N acting at 47◦ to the ceiling. The coefficient of kinetic friction between the block and the wall is 0.67. The acceleration of gravity is 9.8 m/s2 . Find the work done by this force in moving...

*June 27, 2014*

**physics**

A single constant force 18.1 N acts on a particle of mass 2.92 kg. The particle starts at rest at t=0. What is the instantaneous power delivered by the force at t=4.48s? Answer in units of W

*June 25, 2014*

**physics**

A rain cloud contains 3.11 × 107 kg of water vapor. The acceleration of gravity is 9.8 m/s2 . How long would it take for a 1.8 kW pump to lift the same amount of water to an altitude of 20000 m? Answer in units of years

*June 25, 2014*

**physics**

A car and driver weighing 7750 N passes a sign stating “Bridge Out 28.5 m Ahead.” She slams on the brakes, and the car decelerates at a constant rate of 10.6 m/s2 . The acceleration of gravity is 9.8 m/s2 . What is the magnitude of the work done stopping the car if ...

*June 24, 2014*

**physics**

A spring with spring constant of 30 N/m is stretched 0.19 m from its equilibrium position. How much work must be done to stretch it an additional 0.077 m? Answer in units of J

*June 24, 2014*

**Physics**

Two blocks connected by a string are pulled across a rough horizontal surface by a force applied to one of the blocks, as shown. The acceleration of gravity is 9.8 m/s2 . If each block has an acceleration of 5.2 m/s2 to the right, what is the magnitude of the applied force? ...

*June 22, 2014*

**Physics**

A string under a tension of 68 N is used to whirl a rock in a horizontal circle of radius 3.7 m at a speed of 16.53 m/s. The string is pulled in, and the speed of the rock increases. When the string is 0.896 m long and the speed of the rock is 71.5 m/s, the string breaks. What...

*June 22, 2014*

**Physics**

In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.45 × 106 m/s. Find the central force acting on the electron as it revolves in a circular orbit of radius 5.18 × 10−11 m. Answer in units of N

*June 22, 2014*

**Physics**

Zak, helping his mother rearrange the furni- ture in their living room, moves a 48.9 kg sofa 3.3 m with a constant force of 21 N. What is the work done by Zak on the sofa? Neglect friction. Answer in units of J

*June 22, 2014*

**Physics**

A 17.9 kg block is dragged over a rough, hor- izontal surface by a constant force of 74.1 N acting at an angle of angle 32.3◦ above the horizontal. The block is displaced 72.4 m and the coefficient of kinetic friction is 0.242. Find the work done by the 74.1 N force. The...

*June 22, 2014*

**Physics**

A car is moving at 50 miles per hour. The kinetic energy of that car is 5 × 105 J. How much energy does the same car have when it moves at 114 miles per hour? Answer in units of J

*June 20, 2014*

**science check answer**

It actually was B, solenoid is a coil of wire that acts like a magnet when a current passes through it. To increase the magnetic force you need to increase the current. Solenoid does that :)

*May 6, 2014*

**NAU**

When jumping straight down, you can be seriously injured if you land stiff-legged. One way to avoid injury is to bend your knees upon landing to reduce the force of the impact. A 80.6-kg man just before contact with the ground has a speed of 6.59 m/s. (a) In a stiff-legged ...

*April 8, 2014*

**Finance**

NPV= 86013.74 IRR=18.28

*March 19, 2014*

**social studies**

I took the quiz and here are the answers: 1. B 2. C 3. C I got 100%

*March 17, 2014*

**Science**

I have the same test and or the same graph, I will tell you the answer in the shortest time, keep me in touch.

*March 5, 2014*

**need asap trigg**

simplify the expression by using a double angle formula or a half angle formula: a. 2 tan 7 degrees /1-tan^2 7 degrees b.2 tan 7 theta / 1-tan^2 7 theta

*March 3, 2014*

**Trigg**

thanks but I'm still stumped by what they mean about how and what the double angle formula is. The double angle formula confuses me

*March 3, 2014*

**Trigg**

Find sin 2x, cos 2x, and tan 2x from the given infomation csc x=4, tan x < 0

*March 3, 2014*

**Please help Math**

1.square root 2 - 1 or 2^1/2 -1 2.I got -1/2 2^1/2-2^1/4 or -1/2 *square root 2 minus square root 2 (the second 2 has two square roots over it)

*March 3, 2014*

**Math Trigg**

Find sin 2x, cos 2x, and tan 2x from the given infomation csc x=4, tan x < 0

*March 3, 2014*

**USA STUDIES**

What were some of the benefits of the Articles of Confederation?

*March 3, 2014*

**Educational Technology and Online Learning**

I am taking the test right now; and I am going with Category or column headings. I am going to message back if its correct.

*February 28, 2014*

**physics**

to determine that force acting on each mass it was assumed that g=9.8m/s^2. The value of g at the place where the experiment is performed may be slightly different from that value. state what effect it would have on the percentage error calculated for the comparisons to test ...

*February 12, 2014*

**Math**

the answer is 66.thanks mrs.sue

*January 8, 2014*

**Science**

OMG Maddie and Mackenzie are actually here!!!!!!!!!!!!!!!!!!!!!!!!!!!

*December 23, 2013*

**Civics--HELP**

Sorry didn't finish my answer LOL, but yes the correct answer is D, ratification. 'Two-thirds of both houses of Congress voted for proposal. Then three-fourths of the state legislatures voted to ratify, making the amendment part of the Constitution. Each state makes ...

*December 5, 2013*

**Civics--HELP**

Yes, in fact, it is

*December 5, 2013*

**Math-Probability**

Please explain how to get the answer.I have now idea. 1.If you roll two fair dice,one red and one green,what is the probability of getting a 2 on the red die and a 3 on the green die? Give answer in a reduced fraction. 2.If you roll two fair dice,one red and one green,what is ...

*November 14, 2013*

**Chemistry**

Make sure the water’s Mass is still set to 1.0 kg and its Temp is 25 °C. Set the cylinder’s Height to 500 m. How does doubling the mass affect the temperature change of the water?

*October 22, 2013*

**math**

x+2y+3z=-52

*October 1, 2013*

**Chemistry ?**

How many moles are contained in a 4.67-L sample of gas at 30°C and 199 kPa? A. 1.7 mol B. 11.8 mol C. 0.37 mol D. 3.7 mol I guessed D, but I'm not sure.

*August 15, 2013*

**Chemistry help?**

The mass of a quantity of NiCl2 is 24.6 g. How many formula units are in the sample? A. 3.2 3 1023 NiCl2 formula units B. 5.3 3 10–21 NiCl2 formula units C. 1.1 3 1023 NiCl2 formula units D. 1.9 3 1027 NiCl2 formula units

*August 15, 2013*

**Chemistry?**

What mass of sulfur has to burn to produce 4.5L SO2 at 300°C and 101 kPa in the following reaction? S(s) + O2(g) -> SO2(g) A. 3.07 g S B. 68.8 g S C. 41.0 g S D. 13.5 g S

*August 15, 2013*

**Legal Studies**

I nee help to write my legal studies assignment that's due tomorrow,any want to help?

*August 15, 2013*

**Accounting**

26,924

*July 14, 2013*

**math**

a rectangle has a base of 25 in. and a height of 15 in. if the shape is dilated with a scale factor of .6, what is the area of the new shape?

*March 25, 2013*

**Math**

For a chemistry experiment, Heather needs 3.75 grams of salt. How many decigrams of salt does Heather need?

*March 24, 2013*

**Algebra**

Thanks guys! Got 100% Iris!

*March 19, 2013*

**physics**

a student is on a rotating merry-go-round at a constant rate and tosses her apple in the air. if the apple in thrown up with a velocity of 1.2 m/s and the student catches it again after rotating 5.00 revolutions, how fast is the merry-go-round spinning in radians per second?

*February 20, 2013*

**physics**

An airplane starts at rest and accelerates down the runway for 20s. At he end of the runway, it's velocity is 80 m/a north. What is its acceleration?

*February 18, 2013*

**Geometry**

Find KN and LM. In triangle LKM, angle L is bisected. Line segment LK is 11, line segment KN is x-4, line segment NM is 5.4, and line segment LM is 2x + 1.3 (there is a drawing of this triangle) Thanks.

*February 1, 2013*

**Math**

Thank You so much for your help!!!!

*January 29, 2013*

**Math**

answer is 4

*January 29, 2013*

**Math**

Do the x both equal the same number?

*January 29, 2013*

**Math**

Eight times a number equals 24 more than two times the number. What is the number?

*January 29, 2013*

**Math**

A number equals four less than three times the number. What is the number?

*January 29, 2013*

**can u help me**

I think it is both A and B. I will check because I am taking the same test.

*January 17, 2013*

**science**

why does the sun come out write after i rains

*January 6, 2013*

**Chemistry**

I have to sort compounds into groups, separating them by if they are acidic, Ionic, or Covalent. Heres the list: Calcium Carbonate Sodium Hypochlorite Sodium Chloride Sodium Hydrogen Carbonate Acetic Acid Ammonium Hydroxide Silicon dioxide Magnesium Sulfate Carbon Dioxide ...

*December 10, 2012*

**Algebra**

Q+2/5=2q-11/7 •7/7. •7/7 7q+14/35=10q-55/35 •35. •35 7q+14=10q-55 -7q. -7q 14=3q-55 +55. +55 69=3q /3. /3 23=q

*December 2, 2012*

**physics**

If an object wishes to travel 165 km at a rate of 45 mi/hr...how long will it take the object to reach their destination in hours and minutes.

*November 30, 2012*

**science**

please help me i am in 4th grade and i need help on my science project. my science project is, is smiling contagious and i have no idea what to do for research and data

*November 25, 2012*

**Math**

I need help and I forgot my book and class please help me solve theses Sr = SQUARE ROOT 1. What is the solution to -75 sr to the nearest integer? (1 point) 9 8 -8 -9 2. Shelly sews a blanket that has an area of 170 square feet. It has 30 square blocks, each the same size. What...

*November 7, 2012*

**math**

A.7 ounces

*October 17, 2012*

**3rd Grade Science**

30

*October 2, 2012*