Monday

August 3, 2015

August 3, 2015

Total # Posts: 389

**Math**

In a certain industry, 35% are female, 72% work full time and 18% are females who work full time. Probability that a randomly chosen employee is female and does not work full time? A: 0.18 B: 0.54 C: 0.11 D: 0.17 E: 0.098 I got 0.098 because I did 0.35 * 0.28. The actual ...
*July 31, 2015*

**Maths**

Can someone please help me out here. I can't figure out how to do them. I need Pr(A) to do them with the formulas that I know. Please help! Given that Pr(B) = 1/5, Pr(A|B) = 1/3 and Pr(A|B') = 1/3. Determine: a) Pr(A and B') b) Pr(A) c) Pr(B'|A)
*July 31, 2015*

**Math**

I tried so hard for the question below and I couldn't figure it out. Please show some working out. Thanks 10 owners of pedigree dogs will enter the arena to parade their dogs by walking around a circular track. 3 dogs cannot get along together but their is no problem if ...
*July 28, 2015*

**physics**

A bar 4.0 m long weighs 400. N. Its center of gravity is 1.5 m from one end. A weight of 300. N is attached at the heavy end and a weight of 500. N is attached at the light end. What are the magnitude, direction, and point of application of the force needed to achieve ...
*July 9, 2015*

**physics**

hmm the answer is 9000N upward 12 meters from B?
*July 8, 2015*

**physics**

A uniform bar 25 meters long weighs 10,000 Newton's. From end A weight of 2500 Newton's is hung. At B the other end of the bar, there is a weight of 3500 Newton's. An upward force of 3000 Newton's is exerted 4 meters from B, while and upward force of 4000 ...
*July 8, 2015*

**math**

Multiple both sides by 35. Then you get 245.
*July 8, 2015*

**math**

.3455 move decimal two places to the left
*July 8, 2015*

**physics**

yes they are displaced the same amount
*July 7, 2015*

**physics**

A person who weighs 80kg sliding down a 30 degree incline with a coefficient of friction of .20 A person who weighs 80 kg sliding down a 20 degree incline with a coefficient of friction of .20 A person who weighs 40 kg sliding down a 20 degree incline with a coefficient of ...
*July 7, 2015*

**physics**

thank you for the help
*July 3, 2015*

**physics**

A 1500kg car moving at a speed of 20 m/s comes to a halt. How much work was done by the brakes? How fast can a 2.0 horsepower motor lift a 200 kg mass? A boy with a mass of 20 kg is riding on a 10 kg cart which is travelling at 3 m/s. He jumps off in such a way that he lands ...
*July 3, 2015*

**physics**

what work is done in raising a 3.0 kg mass from a 2.5 m high ledge to a 6.5 m high shelf? How much potential energy (Ep) does the mass now posses? Ok so for part 1 its w = m g h w = (3.0kg)(10m/s^2)(6.5m-2.5m) w = 120J now how do you find the potential energy?
*July 3, 2015*

**Chemistry**

is it 2?
*April 7, 2015*

**Chemistry**

1. If two moles of ZnCl2 separate into Zn+ and Cl- ions, how many moles of Zn+ ions are present? 2. How many moles of NO3- are present in one mole of Mg(N03)2? The answers to both of these are 1 mole, right?
*April 7, 2015*

**Geometry **

Two triangles are similar. The ratio of their areas is 1:4. If the height of the smaller triangle is 3 cm, how long is the corresponding height of the larger triangle, in centimeters? does this mean that i just multiply the numbers of the sides by four?
*April 1, 2015*

**Math**

if one container of applesauce contains 3 3/4 ounces, how much applesauce is in a 6-pack of applesauce
*March 30, 2015*

**math **

An equilateral triangle and a square both have perimeters of 48 inches. What is the ratio of the length of the side of the triangle to the length of the side of the square? Express your answer as a common fraction.
*March 26, 2015*

**geometry **

triangle ABC is isosceles with AC = BC and <ACB = 106 degrees. Point M is in the interior of the triangle so that <MAC = 7 degrees and <MCA = 23 degrees. Find the number of degrees in <CMB
*March 24, 2015*

**math **

Suppose that there are two functions, f and g. The domain of f is the interval [-2,10] and the range of f is the interval (-15,2]. The domain of g is the interval (-5,7) and the range of g is the interval [-2,3). Determine all information that you can about the domains and ...
*March 24, 2015*

**math **

Suppose that there are two functions, f and g. The domain of f is the interval [-2,10] and the range of f is the interval (-15,2]. The domain of g is the interval (-5,7) and the range of g is the interval [-2,3). Determine all information that you can about the domains and ...
*March 24, 2015*

**math **

Suppose that there are two functions, f and g. The domain of f is the interval [-2,10] and the range of f is the interval (-15,2]. The domain of g is the interval (-5,7) and the range of g is the interval [-2,3). Determine all information that you can about the domains and ...
*March 24, 2015*

**geometry **

An equilateral triangle and a square both have perimeters of 48 inches. What is the ratio of the length of the side of the triangle to the length of the side of the square?
*March 24, 2015*

**math**

The rectangle pictured consists of two squares placed side by side. The perimeter of the rectangle is 60 cm. What is the number of square centimeters in the area of the rectangle?
*March 23, 2015*

**math**

A 2 inch by 2 inch square has its area increased by 21 square inches producing a new square. How many inches long is a side of the new square?
*March 23, 2015*

**math **

An 8-inch by 8-inch square is folded along a diagonal creating a triangular region. This resulting triangular region is then folded so that the right angle vertex just meets the midpoint of the hypotenuse. What is the area of the resulting trapezoidal figure in square inches?
*March 23, 2015*

**math**

An isosceles, obtuse triangle has one angle with a degree measure that is 50% larger than the measure of a right angle. What is the measure, in degrees, of one of the two smallest angles in the triangle? Express your answer as a decimal to the nearest tenth.
*March 23, 2015*

**math **

Point X is on side of line AC of triangle ABC such that <AXB = <ABX, and <ABC - <ACB = 39 degrees. Find <XBC in degrees.?
*March 21, 2015*

**math **

Rectangle WXYZ is drawn on triangle ABC, such that point W lies on segment AB, point X lies on segment AC, and points Y and Z lies on segment BC, as shown. If <BWZ=26 degrees and <CXY=64 degrees, what is<BAC, in degrees?
*March 21, 2015*

**geometry **

In triangle ABC, the measure of <A is 86 degrees. The measure of <B is 22 degrees more than three times the measure of <C. What is the measure, in degrees, of <C?
*March 20, 2015*

**math **

Point X is on side AC of triangle ABC such that <AXB =<ABX, and <ABC - <ACB = 39 degrees. Find <XBC in degrees.
*March 19, 2015*

**math **

This can be proven by using congruent triangles. Because ACX=YCB are two adjacent angles, one angle is <ACB and the other being an angle that forms an equilateral triangle (which is 60 degrees), it means that ACX=<YCB=<ACB+60. Now we can see that AC=YC, and CX=CB, ...
*March 19, 2015*

**Geometry **

Let ABC be any triangle. Equilateral triangles BCX, ACY, and BAZ are constructed such that none of these triangles overlaps triangle ABC. a) Draw a triangle ABC and then sketch the remainder of the figure. It will help if (triangle) ABC is not isosceles (or equilateral). b) ...
*March 19, 2015*

**business math**

This question is based on a standard modeling problem in business. The unit cost of a item (or drink or chemical) affects how much of the thing is sold. The revenue is the amount of money raised from sales. Hence, raising price should drop sales, but that may result in more ...
*March 18, 2015*

**math **

What is the measure, in degrees, of the acute angle formed by the hour hand and the minute hand of a 12-hour clock at 6:48?
*March 12, 2015*

**math **

One interior angle of a triangle has a measure that is equal to the sum of the measures of the other two angles of the triangle. What is the measure of the smallest exterior angle of the triangle in degrees?
*March 11, 2015*

**math**

When the measures of the angles of a triangle are placed in order, the difference between the middle angle and smallest angle is equal to the difference between the middle angle and largest angle. If one of the angles of the triangle has measure 23 degrees, then what is the ...
*March 11, 2015*

**math**

The ratio of measures of two complementary angles is 4 to 5. The smallest measure is increased by 10%. By what percent must the larger measure be decreased so that the two angles remain complementary?
*March 11, 2015*

**math **

When the measures of the angles of a triangle are placed in order, the difference between the middle angle and smallest angle is equal to the difference between the middle angle and largest angle. If one of the angles of the triangle has measure 23 degrees, then what is the ...
*March 6, 2015*

**Math **

Two complementary angles, A and B, have measures in the ratio of 7 to 23, respectively. What is the ratio of the measure of the complement of angle A to the measure of the complement of angle B? Express your answer as a common fraction.
*March 4, 2015*

**Math-percentages**

Do you not add blueberries to blackberries to find total berries in the smoothie? Then divide? 4blue +12black = 16 berries so 4:16 =25%
*February 18, 2015*

**Math-percentages**

The ratio of blueberries to blackberries in a fruit smoothie is 4:12. What percent of the drink is blueberry?
*February 18, 2015*

**Math-ratios**

Ed, bob, and sue want to share 24 crackers. They each get 8. Bo comes along and they want to share with him too. Now they each get 6. A. what is the ratio of people? I think 3:4 B. What is the ratio of crackers? I think 8:6 or 4:3simplified. C. Explain how these two ratios are...
*February 3, 2015*

**Math-ratios**

Mary saved $44. On Thursday, she spent $7 of her savings. what ratio represents the portion of her total savings that she still has? I know she has $37 left but I don't understand what ratio it would be.
*February 3, 2015*

**MATH**

Two Trains are leaving Kansas City at noon. One is traveling northeast at 38MPH. The other is heading west at 46KPH. At what time in Los Angeles will the trains be 214 miles apart?
*January 28, 2015*

**Math**

Suppose an object is dropped from a height h0 above the ground. Then its height after t seconds is given by h = −16t 2 + h0, where h is measured in feet. Use this information to solve the problem. A ball is dropped from the top of a building 59 ft tall. (Round your ...
*January 24, 2015*

**math**

A box with a square base and no top is to be made from a square piece of cardboard by cutting 4-in. squares from each corner and folding up the sides, as shown in the figure. The box is to hold 324 in3. How big a piece of cardboard is needed?
*January 24, 2015*

**Chemistry**

Iron 3 hydroxide reacts with acetic acid to form iron 3 acetate and water. If 45.4g of water are formed,what mass of iron 3 acetate will be produced? •Fe(OH)3+3HC2H3O2--->Fe(C2H3O2)+3H2O 45.4H2O( ? Fe(C2H3O)) ---------------------------------------- ( ? H2O)
*January 18, 2015*

**programming**

Step 1: Design a flowchart or write pseudocode for a program that allows a user to enter 12 numbers, then displays all of the numbers (in the order they were entered) as well as the largest number and the smallest number. Step 2: Implement and test your design using VisualLogic.
*November 25, 2014*

**Astronomy**

Given the random orientation of planetary orbits relative to our line of sight, do you expect most or only a minority of all planetary systems to show transits?
*November 24, 2014*

**Astronomy**

Does the probability that a single-planet system shows transits increase, decrease or stay the same if the planet has a rather small or a rather large semi-major axis?
*November 24, 2014*

**Physics**

A beaker of mass 5kg containing oil of mass 17.4 kg and density 8.5 x102kg/m3 rests on the scale A block of iron of mass 6.7kg is suspended from the spring scale and completely submerged in the oil as shown in Figure below. Determine the equilibrium readings of lower scale in ...
*November 3, 2014*

**physics**

Assuming you are on Earth, where acceleration due to gravity is 9.81 meters/second2, and you have a pendulum with a cord that is 0.65 meters long, what is the period?
*October 31, 2014*

**Physics**

For the remaining parts of this question use the following settings in "Uniform circular motion" mode. The initial angular velocity is 4.1 rad/s and the radius is 4.1 cm. (c) What is the speed of the object at a time t = 3.0 s after the simulation is started?
*October 25, 2014*

**PSAT**

From 1990 to 1995, the value of one share of stock of XYZ corporation increased by 25%. if the value was D dollars in 1995, what was the value in 1990?
*September 22, 2014*

**Science**

How might creativity help a scientist? a)creativity allows a scientist's findings to be trusted. b)Creativity alllows a scientist to develop new ideas or evaluate old ideas in a new way. c)Creativity assures that the scientist has a sense of right and wrong. d)creativity ...
*August 22, 2014*

**Science**

What type of scientific thinking did alfred wegener employ to develop his theory? A.Inductive reasoning B.Deductive reasoning C.Skeptical reasoning D.Subjective reasoning Is the answer A?
*August 22, 2014*

**Science**

How might creativity help a scientist? A.Creativity allows a scientist's findings to be trusted. B.Creativity allows a scientist to develop new ideas or evaluate old ideas in a new way. C.Creativity assures that the scientist has a sense id right and wrong. D.Creativity ...
*August 22, 2014*

**Algebra**

85% ?
*August 18, 2014*

**Algebra**

Share your answer: there are 80 students in park 12 playing tennis what percentage is not playing tennis?
*August 18, 2014*

**math**

a circular pizza box logo has a sector with a central angle of 80 degrees and a diameter of 16 inches. Find the area of this sector
*April 23, 2014*

**science**

1. A 2. B 3. D 4. C 5. A 6. C 7. D
*March 22, 2014*

**physics**

thank you
*January 26, 2014*

**physics**

Sorry If the comment above was repeated...Something happened... so the period 1.689*10^3s
*January 26, 2014*

**physics**

period is 1/f, right? so if I am looking for period I need to 1/592Hz....which is1.689*10^-3 s, which is very fast
*January 26, 2014*

**physics**

then after that 1/592Hz?
*January 26, 2014*

**physics**

What is the expected period of beats formed when two tuning forks sound simultaneously and have the frequencies f1= 250Hz and 242Hz?
*January 26, 2014*

**Eng 2**

Which sentence has a compound predicate with a direct object? a) Anne backes cakes and cookies. b) Anne loves to bake cakes. c) Anne took baking classes d)Anne baked a cake and ate it
*January 21, 2014*

**algebra 1**

A charity fair raised $6,000 by selling 500 lottery tickets. There were two types of lottery tickets: A tickets cost $10 each, and B tickets cost $60 each. How many tickets of each type were sold?
*January 21, 2014*

**chemistry**

What mass of NiSO4 is present in 2.00 x 102ml of 6.00% NiSO4(aq)? (The density of the solution is 1.13g/ml.)
*November 11, 2013*

**Grammar**

ok, that is what I thought to!! Thank you so much!!
*October 23, 2013*

**Grammar**

Select the correctly punctuated sentence. 1. Thank you for asking me to meet with your patient, Wonder Woman, who came to the appointment accompanied by her husband. 2.Thank you for asking me to meet with your patient Wonder Woman who came to the appointment accompanied by her...
*October 23, 2013*

**physics**

what is the difference between impact distance and horizontal distance?
*October 1, 2013*

**College Math**

A plane flies 460 miles with the wind and 310 miles against the wind in the same length of time. If the speed of the wind is 30 mph, what is the speed of the plane in calm air?
*September 10, 2013*

**algebra**

-11.2=1.6+w/8= solve for w
*August 12, 2013*

**geometry**

Find the area of the quadrilateral in Exam Figure 5. Round your answer to two decimal places.
*July 18, 2013*

**physics**

If I have 1.5 moles of an ideal gas at a pressure of 3 atmospheres and a volume of 7 liters, what is the temperature?
*June 18, 2013*

**physics**

A thin, massless, horizontal pipe rotates about a vertical axis with angular speed ω as shown in the figure. A small bug, located at a distance r from the axis, starts crawling inside the pipe at constant speed v (relative to the pipe). Because of the bug, the motor must ...
*June 17, 2013*

**yutfv**

by what method did you find 0.25?
*June 17, 2013*

**Physics**

for b
*May 11, 2013*

**Calculus **

1) Find correct to six decimal places root of the equation cos(x)= x for xE[0, pi/2] using Newton's Method. 2) A triangle has two constant lengths of 10 cm and 15 cm. The angle between two constant sides increases at a rate of 9 deg/min. Find the rate of increase of the ...
*May 4, 2013*

**Quantum Physics**

uppercase K
*April 16, 2013*

**Solid Mensuration**

A spherical wooden ball 1 ft in diameter is used as a float for a boat. If the ball sinks to a depth of 7 inches, find the area of the wetted surface.
*April 3, 2013*

**Physics 12**

Help will be appreciated. In a large department store, a shopper is standing on the "up" escalator, which is travelling at an angle of 40 degree above the horizontal and at a speed of 0.75 m/s. He passes his daughter, who is standing on the identical, adjacent "...
*March 29, 2013*

**Dynamics**

Ans. (a) v = 2.13 m/s, (b) x = 0.304 m
*March 24, 2013*

**pre ap chem**

determine the partial pressure of hydrogen if it's collected over water at 23 degrees celsius and the system has a total pressure of 724 mmHg then determine the mole fraction of water vapor in the system
*March 6, 2013*

**chemistry**

What is the maximum mass of H2O that can be produced by combining 90.8 g of each reactant
*February 18, 2013*

**chemistry**

In a household radiator, 1000 g of steam at 100 C condenses. How much heat is released?
*February 12, 2013*

**physics**

thank you
*December 20, 2012*

**physics**

what will happen to the bone structure if earth becomes more dense than its actual density?
*December 20, 2012*

**physics**

how to know the raiuds in GMm/r2?
*December 20, 2012*

**physics**

how to use the values of total energy and potential energy in a graph?
*December 19, 2012*

**Phsyics**

I did not get the answer...
*December 18, 2012*

**Phsyics**

Determine the magnitude and direction of the gravitational force exerted a) on the Moon by Earth and b) on Earth by Moon.
*December 18, 2012*

**English**

what are the advantages and disadvantages if King claudius and polopnius overhear Hamlet's "to be or not to be" speech?
*December 17, 2012*

**math**

2.5 qt/min = ____ gal/h
*December 13, 2012*

**science**

what is the probable relationship between the rebound centers and the thickness of ice in canada
*December 13, 2012*

**physics**

After 6.00 kg of water at 80.4 oC is mixed in a perfect thermos with 3.00 kg of ice at 0.0 oC, the mixture is allowed to reach equilibrium. When heat is added to or removed from a solid or liquid of mass m and specific heat capacity c, the change in entropy can be shown to be...
*December 1, 2012*

**Chemistry**

Free Surface Vacancies
*November 28, 2012*