Saturday

August 27, 2016
Total # Posts: 4,882

**calculus**

Find the absolute extrema of the function (if any exist) on each interval. (If an answer does not exist, enter DNE.) f(x) = square root of (25 − x^2) (a) [−5, 5] minimum (x, y) = (smaller x-value) (x, y) = (larger x-value) maximum (x, y) =
*April 5, 2016*

**college algebra**

The electrical resistance of a wire of a given material varies as its length and inversely as the square of the diameter. if a wire 300 feet long and 0.05 inches in diameter has a resistance of 30 ohms, (a) find the resistance of a wire which is 1000 feet long and 0.02 inch in...
*April 5, 2016*

**math (ms sue)**

Suppose that one voter in the 2010 UK General Election was selected at random. The probability that the person voted for the Conservative Party was 0.36, the probability that the person voted for the Labour Party was 0.29, and the probability that the person voted for the ...
*March 30, 2016*

**History**

which of the following was a significant part of the civil rights movement? a.) the civil rights movement got national attention. b.) laws were passed as a result of the civil rights movement. c.) the president provided support of the civil rights movement. d.) all of the ...
*March 23, 2016*

**Maths**

A positive two digit number is divided by the sum of its digits. What is the smallest and largest the result can be?
*March 22, 2016*

**Calculus**

Gravel is being dumped from a conveyor belt at a rate of 15 ft^3/hr and its courseness is such that is forms a pile in the shape of an inverted right cone whose height is three times its base radius. How fast is the height of the pile increasing when the pile has a height of ...
*March 19, 2016*

**Math**

A survey about the student government program at a school finds the following results. 190 students like the program 135 students think the program is unnecessary 220 students plan on running for student government next year. If a circle graph were made from this data, what ...
*March 17, 2016*

**math**

Thanks Ms Sue
*March 17, 2016*

**math**

Find the volume of a rectangular box having width 4.0 ft, length 6.074 ft, and height 8.721 ft. Answer is 211.89 ft
*March 17, 2016*

**Calculus Related Rates**

Two sides of a triangle are 5 and 8 and the angle between them is increasing at .05 rad/sec. how fast is the distance between the tips of the sides increasing when the angle is pi/4
*March 17, 2016*

**Calculus Related Rates**

A balloon is 70 feet from an observer which is rising at 15 ft/sec. At 5 seconds after lift off, how fast is the angle of elevation changing?
*March 17, 2016*

**Geometry **

A fish tank with a rectangular base has a volume of 4,320 cubic inches the length and width of the tank are 15 inches and 12 inches .find the height in inches of the tank
*March 15, 2016*

**Math**

the answer is 13 &1/4
*March 15, 2016*

**Math**

Perform the operation. 8 & 1/2 +5 & 1/8
*March 15, 2016*

**Math**

It is A trust me
*March 15, 2016*

**Social Studies**

1. Which statement best describes the government of Canada? (1 point) The monarch of Britain has total control over Canada. The Canadian parliament is ruled by the United States. Canada has complete power over its own government. The prime minister is the monarch of Canada. 2...
*March 14, 2016*

**Life orientation**

Identify three courses or study fields I'm interested in following after grate 12 write them down and in order of preferences provide two reasons of each choice
*March 13, 2016*

**Physics**

A pool ball of mass 100g and velocity [5,-4]m/s collides with a stationary pool ball of the same mass. After the collision, the pool balls have velocites [2,-3]m/s and [3,-1]m/s. Is the collision elastic? Explain your answer.
*March 11, 2016*

**Physics**

A pendulum bob has a mass of 1kg. The length of the pendulum is 2m. The bob is pulled to one side to an angle of 10degree from the vertical. What is the velocity of the pendulum bob as it swings through it's lowest point? What is angular velocity?
*March 10, 2016*

**Physics**

A ball of mass 500g is kicked into the air at angle of 45degree. It reaches a height of 12m. What was it's initial velocity?
*March 10, 2016*

**science**

If a sheet of Tarpaulin (350gsm) 5m high 7m wide at a pitch of 45% with wind speed of 60mph what will be the upwards force (lift force)in Kg?
*March 10, 2016*

**MAth**

projectile is fired from the ground s=0 ft with initial speed of v=800 ft/sec at an angle of elevation 30 degrees State the vector function the projectile follow,projectile initial velocity vector,vector function,projectile speed function
*March 10, 2016*

**Math**

Look for a pattern and find the next two numbers in the sequence and then write a general version of the nth term. 1 2 3 4 5 6 7 8 n 18 30 42 54 66 78 I can recognize the pattern as being + 12 so under 7 my answer would be 90 and under 8 my answer would be 102, but how do I ...
*March 9, 2016*

**Math**

Look for a pattern and find the next two numbers in the sequence and then write a general version of the nth term. 1 2 3 4 5 6 7 8 n 18 30 42 54 66 78 I can recognize the pattern as being + 12 so under 7 my answer would be 90 and under 8 my answer would be 102, but how do I ...
*March 9, 2016*

**worldhistory 6th grade**

it is c trust me i took then test
*March 8, 2016*

**math.**

Write a function of x that performs the following operations: Raise x to the ninth power, multiply by 5, and then add 6. y=f(x)= (b) Find the inverse to the function you found in part (a). x=g(y)=
*March 8, 2016*

**physics**

Consider the system shown in the diagram. The pulley is a uniform cylinder with mass m3 = 0.60 kg and radius R = 4.0 cm, the other two masses are m1 = 2.5 kg and m2 = 1.0 kg, and á = 30o. Assume the rope is massless, there is no slipping of the rope on the pulley, and ...
*March 8, 2016*

**Chemistry **

Concentrated hydrochloric acid is 12 M. What is the molarity of an HCl solution prepared by diluting 10.0mL of concentrated acid to a total volume of 250.0mL?
*March 8, 2016*

**Chemistry **

How much concentrated 12 M HCl is needed to prepare 200 ml of a 2.5 M solution?
*March 7, 2016*

**Social Studies**

Is it D
*March 7, 2016*

**Social Studies**

I think it is the 3rd one i am not forsure
*March 7, 2016*

**Social Studies**

Why did democracy develop during the Roman Republic? Members of lower social classes began to demand representation in government. Romans wanted to prevent one leader from gaining too much power. Romans wanted to model their system of government after ancient Athens. Members ...
*March 7, 2016*

**Social Studies**

thank you
*March 7, 2016*

**Social Studies**

Which of the following is a example of how the government of the roman republic contribute to the democratic? It was based on a Dictatorship It was based on a tripartite system It was based on a triumvirate system It was based on a written set of laws I think it is the second one
*March 7, 2016*

**math**

7ft board is to be cut into three pieces, two equal-length ones and the third 99 in. shorter than each of the other two. If the cutting does not result in any length being lost, how long are the pieces?
*March 6, 2016*

**Physics**

A soccer ball of mass 550g is at rest on the ground. The soccer ball is kicked with a force of 108N. The player shoes is in contact with the ball for 0.3m. What is KE of the ball? What is the ball's velocity at the moment it loses contact with the soccer player's shoes?
*March 5, 2016*

**Math**

JASON DRIVES 50 MI TO A TRAIN and then continues his trip with a 210 mi train ride. the car travels 20 mph slower than the train. if total travel time is 4 hr, find the average speed of the car and the average speed of the train.
*March 2, 2016*

**math **

Given that f(x)=4x−3 and g(x)=4−x2, calculate f∘g(x)= g∘f(x)= THANKS
*March 1, 2016*

**Physics**

Rosie (mass 41 kg) pushes a box with a horizontal force of 140 N (31.472 lb) at a speed 25 m/min. A. What is Rosie’s power output? Answer in units of W. B.What energy is produced by a 300 W lightbulb lit for 4.1 hours? Answer in units of J
*February 29, 2016*

**Physics**

Zak, helping his mother rearrange the furniture in their living room, moves a 42.3 kg sofa 7.2 m with a constant force of 17 N. A. What is the work done by Zak on the sofa? Neglect friction. Answer in units of J. B. What is the average acceleration of the sofa? Answer in units...
*February 29, 2016*

**physics**

A light beam in air strikes the surface of a liquid at an angle 23.6 degrees from the normal. The angle of refraction in the liquid was measured to be 15.8 degrees, calculate the index of refraction for the object? calculate the speed of light in the object?
*February 29, 2016*

**Social Studies**

I think it is B
*February 29, 2016*

**Social Studies**

How did this law lead to the development of democratic principles? 6-9. When the litigants settle their case by compromise, let the magistrate announce it. If they do not compromise, let them state each his own side of the case, in the comitium of the forum before noon. ...
*February 29, 2016*

**Physics**

Four masses (2kg 3kg 1kg and 2kg) are arranged on a square of side 1.2 m. What is the moment of inertia if the axis of rotation is at the center of the square? What is the moment of inertia if you make the axis of rotation through mass 2kg (this mass cannot contribute to ...
*February 28, 2016*

**Maths**

Rs means Rupees (meant for Indian currency)
*February 28, 2016*

**Maths**

We have Rs.100/-.If we spend Rs.100/-and balance is Rs.102/-,show how is Rs.2/-extra Spent Balance Day 1 Rs 40 Rs 60 Day 2 Rs 30 Rs 30 Day 3 Rs 18 Rs 12 Day 4 Rs 12 Rs 00 -------- -------- Total Rs 100 Rs102......?
*February 28, 2016*

**math**

suppose a>0 and n is a positive interger. is (1/a)^-n = 1/a^-n ? explain your answer
*February 28, 2016*

**World History**

c. He wanted to rid Italy of the Bourbon monarch.
*February 25, 2016*

**statistics**

5 students go to school one of which is known to be late; in fact he is late 22% of the time. What is the probability that he will not be late for school.
*February 24, 2016*

**Physics**

A 20.0 m long uniform beam weighing 800 N rests on walls A and B, as shown in the figure below.(a) Find the maximum weight of a person who can walk to the extreme end D without tipping the beam.(b) Find the forces that the walls A and B exert on the beam when the same person ...
*February 24, 2016*

**Physics**

A sphere of mass 85kg is 12m from a second sphere of mass 65kg. A)what is the gravitational force of attraction between them?
*February 22, 2016*

**Physics**

Sally has a mass of 50.0kg and earth has a mass of 5.98X10^24kg. The radius of earth is 6.371x10^6m. A)What is the force of gravitational attraction between sally and earth? B)What is Sally's weight?
*February 22, 2016*

**Math**

Yay!
*February 22, 2016*

**Math**

Profit
*February 22, 2016*

**Math**

Income
*February 22, 2016*

**Math**

it 914 but is it profit or loss?
*February 22, 2016*

**Math**

A company reports the following income and expenses for a three-month period. What is the company's total profit or loss for the three month period? Great Reads Book Store Month Income Expenses ------------------------------------ June $12,458 - $10,968 July $10,396 - $10,...
*February 22, 2016*

**math**

So its A
*February 22, 2016*

**math**

which expression represents 5 less than y? A. y-5 B. 5-y C. y/5 D. 5y-1
*February 22, 2016*

**Math**

A round cake pan that is 2in deep and has a 7in diameter, plus a 6in by 9in rectangular cake pan that is 2in deep. Which of these pans has the larger volume and why?
*February 22, 2016*

**Chemistry **

For the reaction between ammonia and hydrochloric acid to produce ammonium chloride; What volume of ammonia is used (at 20 Celsius and 760mmHg) if 12.5gmof ammonium chloride are produced in the reaction? How many molecules of ammonia does this represent?
*February 21, 2016*

**Chemistry **

If the density of a gas is 1.2g/L at 745.torr and 20 Celsius, what is the molecular mass?
*February 21, 2016*

**Chemistry **

What is the density of NH3 at 800torr and 25 Celsius?
*February 21, 2016*

**Chemmistry**

Use this percentage to calculate the mass of fluorine (in g) contained in 54.0 g of copper (II) fluoride.
*February 21, 2016*

**Chemistry **

A 10.3g sample of an elemental gas has a volume of 58.4L at 758torr when the temperature is 2.5 C. Determine the identity of the gas.
*February 21, 2016*

**math**

the volume of a sphere is 4/3 pie radius squared. given that pie is 3.142 and radius is 7.3 calculate the volume of the sphere
*February 20, 2016*

**CHEMISTRY!!!! HELP**

3.) Calculate the mass of oxygen gas that can be produced in the decomposition of 5.55 g of silver oxide. This is what I did but is it right?... I need help with a few more btw to double check if i'm doing these right. So here is what I did: First: balance the equation 2 ...
*February 17, 2016*

**ChemistryHELP.PLEASE... TEST SOON**

TEST VERY SOON
*February 17, 2016*

**Chemistry**

Continue #2: So it says to : Calculate the mass of ammonia, NH3, that can be produced. Can someone explain how to derive to the answer? Please
*February 17, 2016*

**Chemistry**

1.) what mass of zinc is needed to completely react with 4.00 g of silver nitrate? 2.) If excess ammonium sulfate reacts with 22.5 g of calcium hydroxide according to the following unbalanced chemical equation: (NH4)2 SO4 + Ca (OH)2 → CaSO4 + NH3 + H2O Now, how do I go ...
*February 17, 2016*

**Chemistry Help please! (:**

Calculate the mass of oxygen gas that can be produced in the decomposition of 5.55 g of silver oxide. This is what I did but is it right?... I need help with a few more btw to double check if i'm doing these right. So here is what I did: First: balance the equation 2 Ag2 O...
*February 17, 2016*

**Math**

Thank you manny
*February 16, 2016*

**Math**

Find the difference. -24 - 5 =? A. -29 B. 29 C.-19 D.19
*February 16, 2016*

**Math**

Find the difference. -14 - (-16) =? A. 30 B. -30 C. 2 D.-2
*February 16, 2016*

**Math**

I think it is B
*February 16, 2016*

**Math**

which of the following is equivalent to (-2) - 5? A. -2 + (-5) B. -2 + 5 C. 2 +(-5) D. 2 - (-5)
*February 16, 2016*

**environmental engineering**

A lake receives 8 m3/s of inflow containing 0.3 mol/m3 of a chemical. The chemical reacts with a first order rate constant of 0.01 h-1. The outflow from the lake is also 8 m3/s. Assume there was no chemical in the lake at the beginning and volume of the lake is 106 m3. What ...
*February 10, 2016*

**environmental engineering**

Pesticide is applied to a 10 ha (hectare) field at an average rate of 1 kg/ha every month. The soil is regarded as 20 cm deep and well-mixed. The pesticide evaporates at a rate of 2% of the amount present per day and it degrades microbially with a rate constant of 0.05 day-1. ...
*February 10, 2016*

**Math**

Thank you niki
*February 10, 2016*

**Math**

Set the numbers from Greatest to least? 15%, 1/8, 0.2, 0.09
*February 10, 2016*

**math**

0.065
*February 10, 2016*

**math**

What is equivalent to 65%? Choose all the apply. 0.065 0.65 13/20 13/25
*February 10, 2016*

**algebra**

The loudness, L L, of a sound (measured in decibels, dB) is inversely proportional to the square of the distance, d d, from the source of the sound. Round to 3 decimal places. A person 15 feet from a jetski, it is 75 decibels loud. How loud is the jetski when the person is 47 ...
*February 9, 2016*

**algebra**

The time required to do a job varies inversely as the number of people working. It takes 5hr for 7 bricklayers to build a park well. How long will it take 10 bricklayers to complete the job? (round answer to 1 decimal place)
*February 9, 2016*

**Social Studies**

It says it in the (bible) New World Translation of the Holy Scriptures in Act 2:36 You can look at it on j w. o r g ignore the spaces
*February 9, 2016*

**Social Studies**

Which key figure in Christianity does this image represent? It is a picture of Jesus tided to a cross A. Peter B. Paul C. Jesus <---- D. God I know that it is Jesus but he never died on a cross, he died on a pole.
*February 9, 2016*

**Social Studies**

I think it is D but i am not for sure
*February 9, 2016*

**Social Studies**

What influence did the Greek epics written by homer have on roman culture? A. They led Roman historians to question their loyalty to the Roman gods. B. They caused Roman historians to disagree over the origins of Roman culture. C. They inspired Virgil to compose an epic poem ...
*February 9, 2016*

**Reading**

Thank you for the poem Ms.Sue
*February 8, 2016*

**Reading**

In adventures of Isabel the only one of Isabel's enemies who survives is a? A.the bear B. the witch C. the giant D. the doctor
*February 8, 2016*

**math**

Find the projection of u = <-5, 3> onto v = <1, 4>.
*February 8, 2016*

**Pre-cal**

For z1 = 4cis (7pi/6) and z2 = 3cis(pi/3), find z1 * z2 in rectangular form.
*February 8, 2016*

**physics (mechanics)**

find the constant force necessary to accelerate a car of mass 1000kg from 15m/s to 20m/s in 10s against resistance of 270N ? pls show work (answer is 770N just in case to check) ive been asking this question 4 times still no one answer . someone pls do .
*February 7, 2016*

**Physics**

Two capacitor plates are equally and oppositely charged. They are separated by 1.30 cm. An electron is released from rest at the surface of the negative plate and, at the same time, a proton is released from rest at the surface of the positive plate. Where do the electron and ...
*February 6, 2016*

**math**

is that a big deal? if it is , then im greatly sorry ....and could someone answer my question pls /display.cgi?id=1454771086
*February 6, 2016*

**math**

vf=10*a vf=sqrt(2ad) or 10a=sqrt2ad 100a^2=2*500*a a=10m/s^2 vf=10*10=100m/s
*February 6, 2016*

**physics (mechanics)**

find the constant force necessary to accelerate a car of mass 1000kg from 15m/s to 20m/s in 10s against resistance of 270N ? pls show work (answer is 770N just in case to check)
*February 6, 2016*

**Physics**

use s= ut +0.5at^2 give 500 = 0(t) + 0.5 (9.8)t^2 t = 10.10s
*February 5, 2016*

**Pre-cal**

What is the area of triangle ABC if a = 19, b = 14, and c = 23?
*February 5, 2016*