Tuesday

January 27, 2015

January 27, 2015

Total # Posts: 159

**Algebra**

It takes 15 men working steadily 4 days to dig the foundation for a new apartment. How many days would it have taken 25 men working at the same rate to dig the foundation? Express your answer as a decimal to the nearest tenth.
*December 31, 2014*

**Finite Math**

Let A and B be two events in a sample space S such that P(A) = 0.5, P(B) = 0.6, and P(A intersection B) = 0.15. Find the probabilities below. Hint: (A intersection Bc) union (A intersection B) = A. (a) P(A|Bc) ________ (b) P(B|Ac) ________
*November 20, 2014*

**Finite Math**

A box contains two defective Christmas tree lights that have been inadvertently mixed with eight nondefective lights. If the lights are selected one at a time without replacement and tested until both defective lights are found, what is the probability that both defective ...
*November 20, 2014*

**intermediate math**

angie and payton jog of opposite each other and angie can jog 4.5 mile faster than payton. after 1.5 hours they are 17 miles apart. how much can each person jog
*September 29, 2014*

**chemistry**

When you put it in Lon-Capa do not capitalize the first letter.
*May 10, 2014*

**Algebra**

f(t) 30000 1+20e^-1.5(t)
*April 12, 2014*

**Algebra**

F(t)= 30000/1+20e^-1.5t Describes the number of people, f(t), who have become ill with influenza t weeks after the initial outbreak in a town with 30,000 inhabitants. a.) How many people became ill with flu when the epidemic began? b.) How many people were ill by the end of ...
*April 12, 2014*

**Algebra**

Medical research indicates that the risk of having a car accident increases exponentially as the concentration of alcohol in the blood increases. The risk is modeled by R=6e^12.77x Where x is the blood alcohol concentration and R, given as a percent, is the risk of having a ...
*April 12, 2014*

**algebra**

Solve the following: 3ln(4x)=17
*April 11, 2014*

**algebra**

solve: log base of 7 (3x+2)=5
*April 11, 2014*

**Math**

How does 26.666 equal 26.2? Could you show me a model of how to do this? Thank You
*April 8, 2014*

**Math**

A shark swam 30 meters to a boat in 16 seconds. How long did it take to swim each meter? 16/30 or 8/15 seconds?
*January 14, 2014*

**Math**

Can you show me the formula used for the following question - how can 7 kids share 3 liters of soda equally?
*January 14, 2014*

**algebra**

I need help solving 8 = 3x + 6y for y. Thank you!
*November 18, 2013*

**algebra**

How do I find the perimeter of a square with one side listed as 4x + 3 and one more side listed as 3(2x - 5)? Thank you
*November 18, 2013*

**math**

On a 9-hour trip home from winter break, Mary was forced to drive on a stretch of highway that had a lot of construction. At first she had to go 55 miles per hour for a certain amount of time, but then she was able to go 65 miles per hour for the rest of the trip and in total ...
*August 19, 2013*

**C++**

what are the simplest methods to understand C++ programming language?
*June 6, 2013*

**Math**

The area of a trapezium is 360 in2. If the ratio of the bases to the height is 6:10:5, find the dimensions of the trapezium.
*June 5, 2013*

**Math**

A 20 foot ladder is leaning against a building. If the ratio of the base of the ladder's distance from the building to its top's height from the ground id 3:4, find how high the top of the ladder is from the ground.
*June 5, 2013*

**Math**

The area of a yard is 15000. If the ratio of the length to the width to the depth is 4:2:1, what are the dimensions of the pool?
*June 5, 2013*

**Physics**

A yo-yo with an axle diameter of 2.00cm has a 80.0cm length of string wrapped around it many times in such a way that the string completely covers the surface of its axle, but there are no double layers of string. The outermost portion of the yo-yo is 4.00 {\rm cm} from the ...
*May 25, 2013*

**Physics**

How much mechanical energy was lost during the ball's fall?
*May 20, 2013*

**Math~Polynomials**

Number Five is three!!
*May 13, 2013*

**Math**

John cut an apple pie into 6 equal slices. His friends ate some of the pie and now 3/5 is left. John wants to put each slice of the leftover pie on its own plate. What part of the pie will he put on each plate?
*April 17, 2013*

**Math Help please**

You complain that the hot tub in your hotel suite is not enough. The hotel tells they will increase the temperature by 10% each hour. If the current temperature of the hot tub is 75 degrees Fahrenheit, what will be the temperature of the hot tub after three hours to the ...
*April 17, 2013*

**Physics**

A heat engine does 650 J of work and dumps 1270 J of heat to its cold reservoir. What is its efficiency?
*April 16, 2013*

**Maths**

Solve for the value of x: 6log(x^2+1)-x=0
*April 14, 2013*

**Please help! Maths**

For what value of K will the equation 3x^2- 4x-(1+K)= 0 have equal roots?
*April 13, 2013*

**Please Reiny Solve it For me Again! please......**

6log(x^2+1)-x=0
*April 10, 2013*

**Please Reiny Solve it For me Again! please......**

Solve for the value of x: log5(x-2)+log8(x-4)=Log6(x-1)..For your information that 5,8 and 6 are bases not just multipliers. Thank you.
*April 10, 2013*

**Please solve**

Solve and graph: y>2x-1
*April 10, 2013*

**Please Help work it out! LOGARITHM**

log4(3x-7)^2=10. I have no idea in working it out.
*April 4, 2013*

**Please Help!!!! Maths**

X^2-6X+1=(3X+5)/2
*April 4, 2013*

**Please Help work it out! Maths**

1/(X-2)=3/(X+2)-(6X/(X^2-4)
*April 4, 2013*

**Please Help work it out! Maths**

(2x-1)/(x+1)=2X/(X-1)+ (5/X)
*April 4, 2013*

**Maths**

Find the value of x: (2x-1)/(x+1)=2x/(x-1)-(5/x)
*April 4, 2013*

**Please solve it for me!! Please...Maths**

x^2-6x+1=(3x+5)/2
*April 4, 2013*

**Please solve it for me!! Please...Maths**

Solve for the value of x: 6log(x^2+1)-x=0
*April 4, 2013*

**Please help me work it out!!! Maths**

solve for x: ln(x^2-6x-16)=5
*April 4, 2013*

**Please help me here!!! Maths**

Solve for the value of x: ln(x^2-6x-16)=5. Please help me work it out because I do not have an idea in work it out.
*April 4, 2013*

**Please help me here!!! Maths**

Isolve for x: ln(x^2-6x-16)= 0 . help me beacuse I do not have the idea to work it out.
*April 4, 2013*

**Please help me!!!! maths**

Solve for x: log5(x-2)+log8(x-4) = log6(x-1). I do not have any idea on this topic.
*April 3, 2013*

**Help!!!! math**

An hiking group wanted to travel a long chapter of the Appalachian Trail for 4 days. They planned to hike 6 hours per day and wanted to complete a trail chapter that was 60 miles long. what rate of speed would they have to average to complete the trail chapter as planned?
*April 3, 2013*

**Please solve it.Logarithm**

Please help me because I do not any idea in Logarithm topic.Solve for the value of X: 6log(x^2+1)=5
*April 2, 2013*

**maths**

For the following graph: a. Find the domain of f. b. Find the range of f. c. Find the x-intercepts. d. Find the y-intercept. e. Find the intervals over which f is increasing. f. Find the intervals over which f is decreasing. g. Find the intervals over which f is constant. h. ...
*February 18, 2013*

**economics**

The country of Arkanslavia had money supplies of 183 million arkollars in 2010 and 644 million in 2011. They have real output of 791 arkollars in both years. In Arkanslavia velocity was 7 in 2010 but changed to 5 in 2011. What is the difference in the price level between 2011 ...
*January 30, 2013*

**Physics: Buoyancy**

A crane lifts the 23000 kg steel hull of a ship out of the water. Determine the following. (a) the tension in the crane's cable when the hull is submerged in the water
*January 27, 2013*

**Physics: Buoyancy**

A crane lifts the 23000 kg steel hull of a ship out of the water. Determine the following. (a) the tension in the crane's cable when the hull is submerged in the water
*January 27, 2013*

**S.S. Check answers**

thank you
*November 9, 2012*

**geometry**

LM has the endpoints L(-1,1) and M(-5,-3) find the coordinates of the midpoint of LM
*June 7, 2012*

**math**

Suppose that $200 was deposited on 1st Jan 2000 into an account that earned 5% interest compounded semiannually. Suppose further that $200 was deposited on 1st Jan 2001 into a different account that earned 6% interest compounded semiannually. In what month of what year will ...
*February 19, 2012*

**math**

Since it didnt ask for an improper fraction or mixed number and that is what we are studying I came up with 40/8 as the improper and 5 for the mixed?
*February 8, 2012*

**math**

A shipment of boxes weighs 40 pounds. There are 8 boxes and each weighs the same number of pounds. How much does each box weigh?
*February 8, 2012*

**Biology**

Explain what happens during each of the three steps of cellular respiration and explain why a lack of oxygen is such a severe problem to the process.
*December 2, 2011*

**Biology**

Using the fundamentals of thermodynamics, explain why we must continue to eat in order to maintain homeostasis?
*December 2, 2011*

**Physics**

A 400-g block of copper at a temperature of 85°C is dropped into 300 g of water at 33°C. The water is contained in a 250-g glass container. What is the final temperature of the mixture?
*November 29, 2011*

**calculus**

A force of 1300 lb compresses a spring from its natural length of 16 in to a length of 10 in. How much work is done in compressing it from 10 in to 6 in?
*November 28, 2011*

**calculus **

find the work done in winding up a 175 ft cable that weighs 4.00 lb/ft?
*November 28, 2011*

**Chemistry**

56.1%
*November 26, 2011*

**physics**

a disk has a mass of 2kg and a length of 2 meters and it oscillates about an axis that is 1.5 meters from the center of the disk. It is initially displaced at an angular displacement of 0.2 radians and released. A) What is the equation of motion? B)What is the kinetic energy ...
*November 20, 2011*

**physics**

What is the gravitational force on a bar that is 3 meters long and has a density of 3x kg/m and lies 3 meters from a 2 kg point mass
*November 19, 2011*

**Physics**

A 2 kg steel ball strikes a wall with a speed of 8.15 m/s at an angle of 54.4◦ with the normal to the wall. It bounces off with the same speed and angle, as shown in the figure. If the ball is in contact with the wall for 0.243 s, what is the magnitude of the average ...
*November 2, 2011*

**Physics**

A 0.30 kg puck, initially at rest on a frictionless horizontal surface, is struck by a 0.20 kg puck that is initially moving along the x axis with a velocity of 2.8 m/s. After the collision, the 0.20 kg puck has a speed of 0.5 m/s at an angle of θ = 53° to the ...
*October 23, 2011*

**physics**

How far to the nearest tenth of a meter can a runner running at 15 m/s run in the time it takes a rock to fall from rest 68 meters?
*October 6, 2011*

**Physics**

A box of books weighing 290 N is shoved across the floor of an apartment by a force of 400 N exerted downward at an angle of 35.0° below the horizontal. If the coefficient of kinetic friction between box and floor is 0.57, how long does it take to move the box 3.80 m, ...
*October 2, 2011*

**Physics**

A train has a mass of 5.22 multiplied by 106 kg and is moving at 70.0 km/h. The engineer applies the brakes, which results in a net backward force of 1.87 multiplied by 106 N on the train. The brakes are held on for 37.0 s. (a) What is the new speed of the train? (b) How far ...
*October 2, 2011*

**science**

a mineral is organic, which means that it contains what?
*September 28, 2011*

**algebra**

sam mowed half of the yard on friday and half of the remaining grass on saturday what fractional part of yard still needs to be mowed
*September 27, 2011*

**math**

how do you find the square root of 57 and then round to the nearest tenth
*September 27, 2011*

**Chemistry**

In the following reaction, it 13g of sodium are reacted how many grams of copper(solid) can be obtained? 2Na(s)+ Cu(NO3) 2 - - > 2NaNO3 + Cu(s)
*September 25, 2011*

**Math**

If the product of two numbers is 65 and one of the numbers is 8 more than the other, what is the remaining number?
*September 15, 2011*

**algebra**

34a*22
*September 14, 2011*

**3rd grade math**

my answer is 37
*September 6, 2011*

**physics**

How many mL of orange juice would be required to get the recommended daily allowance of 60 mg of vitamin C? (Concentration of vitamin C is .011 moles/L in 5.0 mL of juice).
*May 4, 2011*

**world history**

is pennsylvania's government a monotheistic or not?
*April 30, 2011*

**Physics**

The useful power output of Bryan Allen, who flew a human-powered airplane across the English Channel on June 12th, 1979, was about 350 W. The propellor of the airplane was driven by the pilot's legs, using a bicycle-tyoed mechanism. Using the efficiency for legs (20%), ...
*April 5, 2011*

**physics**

"By means of a rope, whose mass is negligible, two blocks (mass: 11kg and 44 kg) are suspended over a pulley. The pulley can be treated as a uniform solid cylindrical disk. The downward acceleration of the 44 kg block is observed to be exactly one half the acceleration ...
*April 3, 2011*

**physics**

"A solid cylinder and a thin-walled hollow cylinder have the same mass and radius. They are rolling horizontally along the ground toward the bottom of an incline. They center of mass of each cylinder has the same translational speed. The cylinders roll up the incline and ...
*April 3, 2011*

**Physics**

"A 1220-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam. Find a) the magnitude of the tension in the cable and b) the magnitude of the horizontal and vertical ...
*April 3, 2011*

**Physics**

"A small 0.5 kg object moves on a frictionless horizontal table in a circular path of radius 1 meter. The angular speed is 6.28 rad/s. The object is attached to a string of negligible mass that passes through a small hole in the table at the center of the circle. Someone ...
*April 3, 2011*

**physics**

"A small 0.5 kg object moves on a frictionless horizontal table in a circular path of radius 1 meter. The angular speed is 6.28 rad/s. The object is attached to a string of negligible mass that passes through a small hole in the table at the center of the circle. Someone...
*April 1, 2011*

**physics**

"A 1220-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam. Find a) the magnitude of the tension in the cable and b) the magnitude of the horizontal and vertical ...
*April 1, 2011*

**physics**

"A solid cylinder and a thin-walled hollow cylinder have the same mass and radius. They are rolling horizontally along the ground toward the bottom of an incline. They center of mass of each cylinder has the same translational speed. The cylinders roll up the incline and...
*April 1, 2011*

**physics**

"By means of a rope, whose mass is negligible, two blocks (mass: 11kg and 44 kg) are suspended over a pulley. The pulley can be treated as a uniform solid cylindrical disk. The downward acceleration of the 44 kg block is observed to be exactly one half the acceleration ...
*April 1, 2011*

**physics**

Since there are no non-conservative forces involved in this scenario, you can use the principle of the conservation of momentum. Set up the momentum of the baseball player equal to the momentum of the baseball: (75kg)(vB)=(0.145kg)(40m/s). The velocity of the baseball player ...
*March 31, 2011*

**separatio of variables**

solve the initial value problem by separation of variables dy/dx=6x^2y and y(0)=4
*March 19, 2011*

**separation of variables**

solve the initial value problem by separation of variables dy/dx=x2/y given y=-5 when x=3
*March 19, 2011*

**geometry**

What does it mean when the scale factor of the actual object to its model is less than one?
*February 6, 2011*

**diameter**

if the sum of the diameters of two circles is 28 inches one circle has a diameter that is 8 inches longer than the diameter of the other what are the diameters of the two circles
*January 24, 2011*

**math**

Explain why arcsin 3 is undefined.
*January 21, 2011*

**chemistry**

Is this a buffer system? NH3/(NH4)2SO4? It is formed by mixing NH3 (weak base) and a strong acid (H2SO4), but according to my worksheet it is not a buffer system. Why is this so? Isnt it a buffer as long as it consists of a weak base and its salt of a strong acid? Please do ...
*January 13, 2011*

**science**

how does movement differs among Bacteria, grasshoppers, fish, bear
*August 17, 2010*

**chemistry**

1) DETERMINE pH of each of the following 2-component solutions. 0.08M RbOH & 0.130M NaHCO3
*July 18, 2010*

**chemistry**

Suppose a fuel-cell generator was used to produce electricity for a house. If each H2 molecule produces 2e- , how many kilograms of hydrogen would be required to generate the electricity needed for a typical house? Assume the home uses about 850 kWh of electricity per month, ...
*July 11, 2010*

**physics**

carts of a roller coaster are travelling 5m/s over the top of the first hill. If there is no energy loss due to friction and the hill is 50m high,what speed will the carts have at the bottom
*July 1, 2010*

**physics**

carts of a roller coaster are travelling 5m/s over the top of the first hill. If there is no energy loss due to friction and the hill is 50m high,what speed will the carts have at the bottom
*July 1, 2010*

**chemistry**

How much limestone (CaCO3) in kilograms would be required to completely neutralize a lake with a volume of 5.2 x 10^9L . The lake contains 5.0 x 10^-3 moles of H2SO4 per liter?
*June 28, 2010*

**chemistry**

How much limestone (CaCO3) in kilograms would be required to completely neutralize a 5.2 x 109 --L lake containing 5.0 x 10 -3 of H2 SO4 per liter?
*June 28, 2010*

**Math: Is my answer correct?**

it is a
*May 2, 2010*

**math**

what is a mode
*May 2, 2010*