# Posts by eric

Total # Posts: 806

**Statistic **

At peak periods 15 of attempted logins to an email service fail. log-in attempts are independent and each has the name probability of failing. Ann logs in repeatedly until she succeeds A. Find the probability that Ann needs to log in atleast four times before she succeeds B. ...

**Statistic**

At peak periods, 15% of attempted log-ins to an email service fail. Log-ins attempts are independent and each has the same probability of failing. Ann logs in repeatedly until she succeeds. A. find the probability that Ann needs to log in at least four times before she ...

**Science**

What is the mechanical advantage of a machine that used 600N to overcome a load of 1200

**Math**

Kayla has 3 yards of ribbon. She wants to cut the ribbon into pieces that are 1/4 yard long. How many pieces of ribbon will Kayla have

**Chemistry**

Suppose a student diluted and titrated a bleach unknown exactly as described in the experimental procedure, except only a single titration was performed which required 16.22 mL of 0.100 M Na2S2O3. The density of the original, undiluted bleach unknown was g/mL. If the number of...

**Chemistry**

Suppose a student diluted and titrated a bleach unknown exactly as described in the experimental procedure, except only a single titration was performed which required 16.22 mL of 0.100 M Na2S2O3. The density of the original, undiluted bleach unknown was g/mL. If the number of...

**algebra**

Thank you for your help.

**algebra**

Want to make sure I am doing this correctly. Use the Intermediate Value Theorem for polynomials to show that the polynomial function f(x)has zero between the numbers given. f(x)=3x^2-x-4 ; 1 and 2 3(1)^2-1-4= - 2 below zero 3(2)^2-1-4= 6 above zero Am I doing this problem correct

**Chemistry 2**

The molar heat of solution of ammonia is ?30.50 kJ/mol. What happens to the temperature of water when ammonia is added to it? I simply don't know how to answer this and wouldn't ask otherwise. I would be very grateful for assistance.

**Algebra**

I have that but it tells me to check for extraneous solutions and that is where I am lost for this problem

**Algebra**

X=-6/7 This was answer to the problem

**Algebra**

I have answered the question but not sure how to check for extraneous solution. x/(5x+4)=3 The answer is -6/7

**Physics**

A circus cat has been trained to leap off a 12-m-high platform and land on a pillow. The cat leaps off at v0 = 3.6 m/s and an angle ? = 37°

**Algebra**

Need help figuring this problem out. The following points are on the graph of: y=f(x) (-5,0),(-2,2),(0,0),(2,-4) and (4,0) Use theorem to identify the corresponding points on the transformed functions. y = 2f(x-3)-2

**statistics**

The closing price of Schnur Sporting Goods Incv. common stock is uniformly distributed between $20 and $30 per share. Draw the uniform distribution. What are the height and base?

**Pre Cal**

Write an expanded polynomial equation based on the following information. A cubic function with a zero at x=3 (with multiplicity 2), a zero at x=2, and a constance term of 18.

**Math**

Sam is hoisting an engine form a pickup truck he is fixing. He hands hoist using 3 rafters on ceiling. Measures the angle the hoist makes at the baseto be 85 degrees and the length across the of chain across rafters to be 80 inches. One length of chain hanging down from ...

**Science**

why does all the information available state that the maximum amount of table salt that can dissolve in water is: 36-39 g/100 ml @ 20 degrees Celsius. i put 35.7 g in 100 ml over a week ago, check it 3 times daily and a lot of it never dissolved. the water remained cloudy and ...

**statistics**

Scores on the GRE? (Graduate Record? Examination) are normally distributed with a mean of 541 and a standard deviation of 101. Use the 68-95-99.7 Rule to find the percentage of people taking the test who score between 238 and 844 The percentage of people taking the test who ...

**Math**

How many inches represent 1 mile. Help 3/10 in = 7/8 mile

**Math**

I have to find the Unit Price of 64 fl oz = $2.00 I have concluded that 2 / 64 is the answer but I think there is an easier way to show it please help

**Math**

What is the result of converting 1500 yards into miles?

**Calculus**

Evaluate the definite integral (low) (high) -?/6 ? ?/6 2sec(x)tan(x) dx

**Calculus**

Find the value(s) of c guaranteed by the Mean Value Theorem for Integrals for the function over the given interval. f(x) = 4?x [4, 9]

**Calc**

0 = theta

**Calc**

Find the critical numbers of the functions. f(0) = 2sec0 +tan0 on the interval [0,2pi]

**Math**

Simplify (Log75+log9+log5)÷(log5+log45)

**math**

The ratio of two numbers is 3:5, the smallest number is 45 what is the larger number?

**social studis**

In this lesson, you learned that government officials represent citizens at the state and local levels as well as at the national level.

**math**

in which stem do most of the data fall 1 ,2 3, or 4

**Math**

in which system do most of the data fall 1 ,2 3, or 4. plzzzzz help me

**math**

C 15

**art**

this piece of art primarily represents art that

**What is the probability that a randomly**

what grade are you I go to connexus i am in 6th grade

**PE**

How does esteem affect the way you behave?

**Physics**

A batted baseball leaves the bat with a velocity of 41.4 m/s at an angle of 51.2°. If the ball just barely clears the 3.05 m (10 ft) center field wall, a. How long was the ball in the air? ___s b. What must the range be from home plate to the center field wall? ___m c. How...

**Physics**

Physics teacher has this question for hw. 38. An electric powered model car starts from rest and moves in a straight-line for 4.0 s. The relationship between time and position is x^2+ 2 t^2 = 32, t in seconds and x in cm. Find the velocity at t= 1 s & t = 3 s. he gave us the ...

**Chemistry**

When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 26.4 g of carbon were burned in the presence of 82.1 g of oxygen, 11.7 g of oxygen remained unreacted. What mass of carbon dioxide was produced? Express your answer to one decimal place and ...

**Educational Technology and Online Learning**

what is the purpose of the introduction in an expository essay

**Math**

Whats the function rule when inputs 2,3,4,5 and outputs 2,5,8,11?

**Maths**

Ruby has 20 oranges. she eats 3/5 of the oranges. How many oranges did she eat

**Math**

Sorry I don't know.

**Maths**

how to solve 150 pupils went to concert.3/4 of the number of boys was equal to 1/7 of the number of girls. how many boys went to the concert?

**Geometry**

A vertical pole 24ft. high is to be braced securely by four wires attached 8ft. from the top. If the wires are fastened to stakes in the level ground at the vertices of square with its center at the foot of the pole and sides 20ft., what should be the length of each wire?.

**Chemisty**

Will Cd(OH)2 precipitate if 10.00 g of Cd(NO3)2(s) (MM = 236.42 g/mol) is added to 0.500 L of a 0.800 M NH3 solution?

**Math**

The large rectangle shown, is composed of five congruent smaller rectangles, each with whole number dimensions. If the perimeter of each smaller rectangle is 20 com, find the are of the entire large rectangle in sq cm.

**Physic**

A large concave mirror has radius of 6.32m. To magnify an object 1.25m tall by a factor of +2.5 Must the object be placed Will the image appear to be Describe the image 3 things What is the image height

**Physic**

A large concave mirror has radius of 6.32m. To magnify an object 1.25m tall by a factor of +2.5

**Chemistry**

Using the equation: 2C2H6 + 7O2--> 4CO2 + 6H20 How many moles of CO2 are produced by the reaction of 21.0 mol O2? Again, not sure how to write it correctly, but if I multiply 7O2 by 3, then I should do the same to the other side of the equation to make it 12CO2?

**Chemistry**

From the same equation as above, how many moles of CO2 are produced by the reaction of 21.0 mole of O2? 21 moles of O2 means that you would need to multiply 7O2 in the quay ion by 3, so 3 x 4CO2= 12CO2?

**Chemistry**

Using the equation: 2C2H6 + 7O2--> 4CO2 + 6H20 How may moles of 02 are needed to react with 4.0 mol of C2H6? I think the answer is 14, because if you double the C2H6 to make 4.0 mol, then in the equation you will need to double the O2 to 14. Is this correct?

**math**

x= -13

**math**

A number plus itself, plus twice itself, plus 4 times itself, is equal to -104. What is the number?

**math**

A pair of dice is rolled.What is the probability that the sum of the pips is either an even number on a multiple of 3? total number of space is 36.

**Math**

An enclosed rectangular garden is 6 meters by 15 meters. Additional fencing within the garden can divide it into three smaller plots, two of them square and one rectangular. What is the least number of meters of additional fencing that is needed?

**Algebra**

Tell whether the lines for each pair of equations are parallel perpendicular of neither y=-3x+7 -2x+6y=3 Tell whether the lines for each pair of equations are parallel perpendicular of neither y=(-1/5)x=6 -2x+10y=5

**Algebra (Urgent)**

There should be three answers:) Thanks for your help LadyPhantomhive

**Algebra (Urgent)**

Which of the following lines are perpendicular to the line y=-1/4x+6 (you may choose more than one answer) 4x-y=2 y=4x 4x+y=6 1/4x-y=6 -4x+y=3

**Physics**

Three positive point charges are located at the corners of a rectangle. Find the electric field at the fourth corner if q1 = 5 nC, q2 = 6 nC, and q3 = 7 nC. The distances are d1 = 0.6 m and d2 = 0.2 m. (Let the positive x-direction be to the right, and the positive y-direction...

**Physics**

In the bloodstream, an erythrocyte (red blood cell) of mass m moves with velocity v to the right. Ir collides head-on with a leukocyte (white blood cell) of twice its mass moving to the left with three times its speed. After the collision, the became stuck together. What would...

**Physics**

A spring with k=1400N/m is firmly anchored to the bottom of a swimming pool. A diver in full SCUBA gear with total mass of 100kg and density of 0.65g/cm3 holds on to the top of the spring. The system reaches a new static equilibrium. After the print is elongated by a length ...

**Physics**

Imagine a horizontal spring with an elastic constant of 26.5 N/m, held in place just above an air table. If a 2.00 kg mass traveling at 1.50 m/s slams axially into the end of the spring, by how much will it be compressed in bringing the mass to rest?

**Science**

25.6g

**Introduction to computers**

You call the help desk to report a problem you are having on your computer. The technician asks you what operation system you are running. You know it is windows 7 but you forgot which version . How can you find out.

**Introduction to computers**

Which Microsoft operating system started the process of authenticating users with a username and password

**Introduction to computers**

The command prompt found on Windows 7 and Windows 8 is very similar to the interface of what past operation system.

**Chemistry**

Is nickel 2 chloride an anion or cation ?? Is sodium chloride an anion or cation ?

**physics 11**

A swimmer swims perpendicular to the bank of a 20.0 m wide river at a velocity of 1.3 m/s. Suppose the river has a current of 2.7 m/s [W]. (a) How long does it take the swimmer to reach the other shore? (b) How far downstream does the swimmer land from his intended location?

**math**

From cape to home is 500km I drive from Home at a 100km/h how long will it take in hours

**Algebra 2**

Solve the following sequence systems algebraic ally x+2y=17 x-y=2

**Algebra 2**

Create an explicit equation for each recursively defined sequence below a1=17,an+1=an-7

**Algebra 2**

x-3/x=3/5

**physics**

While John is traveling along a straight interstate highway, he notices that the mile marker reads 256 km. John travels until he reaches the 144 km marker and then retraces his path to the 173 km marker. What is John’s resultant displacement from the 256 km marker? How ...

**Algebra 2**

Solve each system 3x-9y=3 and 2x=16-y

**Algebra 2**

Solve each system 6x-2y=10 and 3x-2=y

**Algebra 2**

For the function f(x)=square root 3x-2 find the value of the expression below. What value of x makes f(x)=6

**Social Studies**

These are totally wrong I got 50% 2/4

**Kitondo boys**

A triangle has vertices X(2,2) ,Y(4,2)and Z(3,4).The triangle is enlarged by a scale factor 2 through the origin.What are the coordinates of the image?

**Physics**

Basically... distance is 4 km Takes 4 min to go down river Takes 6 min to come up How fast is the river?

**Statistics/probability**

You are considering two mutual funds for your investment. The possible returns for the funds are dependent on the state of the economy and are given in the accompanying table. State of the Economy Fund A Fund B Good 20% 40% Fair 10% 20% Poor -10% -40% You believe that the ...

**Physics-Trajectory**

A particle's trajectory is described by x =(12t3−2t2)m and y =(12t2−2t)m, where t is in s. What is the particle's speed at t=0s ? What is the particle's speed at t=5.0s ? Express your answer using two significant figures. What is the particle's ...

**Physics**

Three forces are exerted on an object placed on a tilted floor. Forces are vectors. The three forces are directed as shown in the figure. If the forces have magnitudes F1 = 2.0 N, F2 = 17.0 N and F3 = 15.0 N, where N is the standard unit of force, what is the component of the ...

**Physics**

The components of vector A⃗ are Ax = + 3.90 and Ay = -4.00. What is the angle measured counterclockwise from the +x-axis to vector A⃗ ?

**Physics-VECTORS**

Find the vector's magnitude and direction. Part A A⃗ = 4 i^− 8 j^ A =? θA =?

**Physics**

A rocket-powered hockey puck moves on a horizontal frictionless table. The figure below shows the graphs of vx and vy, the x- and y-components of the puck’s velocity. The puck starts at the origin. The graph of the X-velocity is v=8t cm/s and the Y-velocity is V=30cm/s ...

**Chemistry**

a) Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 degrees Celcius, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 13.8 g of biphenyl in 32 g of benzene? b) Express...

**Math**

Interval it exists on: (5-x)y"+3xy'-y=1 y(0)=2

**english**

How can animated jungle animals, sea creatures, fairies, cars and other non-human characters can be used to represent race?

**biology**

lymphocyte

**nutrition**

Which of the following is one of the ways that the endocrine system interacts with the digestive system? a) Eliminates wastes generated in the body b) Transports nutrient to cells c) Controls the passage of food in the blood stream d) Secretes hormones that regulate how much ...

**nutrition**

Which is the best way to balance your dietary choices? a) If you overeat at lunch, you should skip dinner. b) If you eat two slices of pizza at lunch, you should walk an extra mile after dinner. c) If your dinner has no vegetables, you should eat a cereal containing fiber at ...

**nutrition**

I say it is D

**nutrition**

Which is the best way to balance your dietary choices? a) If you overeat at lunch, you should skip dinner. b) If you eat two slices of pizza at lunch, you should walk an extra mile after dinner. c) If your dinner has no vegetables, you should eat a cereal containing fiber at ...

**nutrition**

Which of the following is one of the ways that the endocrine system interacts with the digestive system? a) Eliminates wastes generated in the body b) Transports nutrient to cells c) Controls the passage of food in the blood stream d) Secretes hormones that regulate how much ...

**Math**

there is a swimming pool, 3 meters in width and 4 meters in length. the owner wants to built a uniform deck around the swimming pool which is 3 times of the area of the pool. what's the width of the deck?

**Differentail Equations**

I cant figure out how to do this type of problem! Consider the first order differential equation y′+(x/(x^2−4))y=(e^x)/(x−9) For each of the initial conditions below, determine the largest interval a<x<b on which the existence and uniqueness theorem for...

**History**

How did the success of the civil rights movement and abolishment of slavery open doors to the election of the first Black American President of the United States, Barack Obama? Can I have some examples?

**Physics**

A massive steel cable drags a 20kg block across a horizontal, frictionless surface. A 100N force applied to the cable causes the block to reach a speed of 4.2m/s in a distance of 2.1m . What is the mass of the cable?

**english**

Cuba is one of the few remaining communist countries in the world. Since the collapse of the Soviet Bloc in 1990, however, the country has promoted capitalism in the form of tourism in order to stimulate the economy.

**pre - CALCULUS**

the solution would be: ( det 8 1 det 2 8 24 3 6 24 _____ ______ det 2 1 2 1 6 3 , 6 3 ) which is (0/0, 0/0) The zero in the denominator indicates that the system can not be solved using cramer's rule and is therefore not consistent and independent. I have not read this but...