# Posts by Jay

Total # Posts: 1,704

**math**

answer in simplest radical form. sin 90 degrees

**math**

answer in simplest radical form. sin 90 degrees

**math**

A coin is tossed four times. Find the probability of each of the following: P(exactly 1 head) I know we have to use to this formula p(x=0)=nCk(p)^k(1-p)^n-k How do you find P? if n=4

**grammar**

fire can be either friendly or a foe, depending on the situation. make parallel

**Chemistry**

Choose the two half-reactions from a table of standard reduction potentials that most closely approximate the reaction that occur within the battery (Pacemaker). What is the standard voltage generated by a cell operating with these half-reactions? (i got +3.85V). The actual ...

**Chemistry**

Thank you so much

**Chemistry**

What is the half-cell reactions in a hydrogen fuel cell, and calculate the standard voltage at 25°C H2(g)+ O2(g)------>2H2O(l)

**Chemistry**

Choose the two half-reactions from a table of standard reduction potentials that most closely approximate the reaction that occur within the battery. What is the standard voltage generated by a cell operating with these half-reactions? 2Li(s) + Ag2CrO4(s) --------> Li2CrO4(...

**Chemistry**

Heart pacemakers are often powered by lithium-silver chromate “button” batteries. The overall cell reaction is: 2Li(s) + Ag2CrO4(s) --------> Li2CrO4(s) + 2Ag(s) Lithium metal is the reactant at one of the electrodes of the battery. Is it the anode or the cathode?

**Chemistry**

Thank you very much. This helps a great deal

**Chemistry**

Explain with values and reactions from standard reduction potentials tables why neither gold (I) nor gold (III) not to mention the base metal itself, tarnishes (that is can be oxidized by exposure to air)

**Chemistry**

How much time in years (assume a 365 day yr) would it take for a 1.6678g sample of 239Np to decay to a mass of 0.8671g if it has a half life of 2.030*10^5s

**Chemistry**

How much energy in KJ is release to form one mole of 123Sb from protons and neutrons if the atom has a mass of 122.90422 amu? Please remember to include the mass of electrons in calculations.

**Chemistry**

A rock containing 238U and 206Pb was examined to determine its appropriate age. The molar ratio of 206Pb to 238U was 0.1462. Assuming no lead was originally present and that all lead formed remained in the rock. What is the age of the rock in years? The half life of 238U is 4....

**Statistics**

Hi I am a college student in wireless technology but am only very sketchy on statistics. I'm am trying to write a program to tell me if activity is unusual. I can read the activity of a person from a motion detector from day to day i.e. mon activity - 250 times tues - 300 ...

**geometry**

Jackson is creating a water garden surrounded by a triangular patch of grass. If the pond will take up the space indicated by the circle, how many square feet of sod will he need to complete the garden (use 3.14 for and round your answer up to the next foot)?

**math**

16 = 16x^2 - 64x + 64 0 = 16x^2 - 64x + 64 - 16 (using quadratic formula) x= 3 or x =1

**Math**

Anyone help?

**Math**

What other post?

**Math**

Can someone guide me with this question? Four teachers and five students have volunteered to serve on the school's fundraising committee, which is chaired by the principal. The principal wishes to select the committee using a random draw. He places each person's name ...

**Math**

Should I create a grid 6 by 5? :S

**Math**

faizel wants to travel from his house to the hardware store that is six blocks east and five blocks south of his home. If he walks east and south, how many different different routes can he follow from his house to the store? Can somebody help me setup this question? I don'...

**Math**

Find the instantaneous rate of change for the function at the given value. f(x)=x^2+2x at x=-4

**Math**

Using the arrangement of letters in the margin, compute the number of paths that spell the word MATHEMATICS if all paths must start at the top and move diagonally down through the letters. M A A T T T H H H H E E E M M M M A A A T T I I I C C S I only got up to E E E, I don&#...

**Calculus**

Could someone work this out so I understand it. Thanks Given the supply function p=S(x)=5(e^0.02x-1) Find the average price (in dollars)over the supply interval [31,36] The 0.02x in the only thing ^ on the e

**History**

how trading helped sparta economy?

**world history**

The Europeans desire for profit affected the people of Congo by taking away their freedom, forcing them into slavery, taking away their customs, affected the economy etc.

**Chemistry**

The vapor pressure of water at 95C is normally 6.33.9 but decreased to 561.2mmHg upon addition of an unknown amount of NaOCl to 164.3g of water at this temp. How many grams of NaOCl was added assuming complete dissociation of the solute

**Chemistry**

I followed this procedure but i was told the answer was incorrect. Any help would be appreciated.

**Chemistry**

Oh just kidding after much frustration and stepping away from the problem and coming back, I noticed that I messed up the density in my conversion. I had the right idea I just had to correct my mistake and then continue on with the molar mass of CaF2, then I divided 4 ...

**Chemistry**

Calcium fluoride is the well-known mineral fluorite. It is known that each unit cell contains four Ca2+ ions and eight F- ions and that the Ca2+ are arranged in a face-centered cubic lattice. The F- ions fill all the tetrahedral holes. The edge of the CaF2 unit cell is 5.46295...

**Math**

Can someone help me verify if this is correct? Gasoline usage for compact cars in Canada is a normal distribution with a mean of 33.3 km/l and with standard deviation of 7.3 km/L. Round your answers to one decimal place. a) What percentage of compact cars obtains 20km/L or ...

**Math**

anyone?

**Math**

Can someone help me verify if this is correct? Gasoline usage for compact cars in Canada is a normal distribution with a mean of 33.3 km/l and with standard deviation of 7.3 km/L. Round your answers to one decimal place. a) What percentage of compact cars obtains 20km/L or ...

**Math**

She added 4, multiplied the sum by -5, and subtracted 12. She then doubled the result and got -34. What number did Christa started with?

**social studies**

what was one of the increased use of the assembly line in the 1920's?

**geography**

what would happen if wheat was no longer a resource to the U.S.?

**Physics**

A 7.80-g bullet moving at 590 m/s penetrates a tree trunk to a depth of 4.8 cm. Assuming the friction force is constant, determine how much time elapses between the moment the bullet enters the tree and the moment it stops moving.

**chemistry**

for an exotherimic reaction incresing the reaction temperature results in a (n)___k ?

**chemistry**

given reaction at equilibrium, if Kp=1.05 at 250 degree celcius, then kc =

**algebra**

8000, because 1m=100cm. You take the 100m/5cm=20 cubes. V=LxWxH. 20x20=400x20=8000

**chem**

how many moles of NaOH are needed to neutralize 50.0 Ml 0f ).242 M H2SO4 solution ?

**physics**

The engine weighs 4500 newtons and it is lifted 1.5 meters up by the block and tackle system. The mechanic must apply a force of 225 newtons while pulling a total of 37.5 meters of chain through the block and tackle pulley system. What is the work done by the block and tackle ...

**Physics**

.455

**Geometry**

(20^2-7^2) = 351 sqrt of 351 = 18.7

**Geometry**

Find the length of the altitude of an isosceles triangle if one side has a length of 20 ft and a base of 14 ft?

**English**

Yeah but the entire essay is a narration, and in my question I had to pick out the thesis for both Frazier and his narrator. So I had to find in the essay where Frazier interjects his own thesis.

**English**

I am between two different thesis statements for Frazier either it is where the writing becomes italicized, "Remember to keep shower curtain inside tub at all times!" Or In the last paragraph from Operating the shower curtain is kind of tricky to there is no need ...

**English**

Within this I have another question. I am between two different thesis statements for Frazier either it is where the writing becomes italicized, "Remember to keep shower curtain inside tub at all times!" Or In the last paragraph from Operating the shower curtain is ...

**English**

Help! In Ian Frazier's essay How to Operate the Shower Curtain, what problems are users likely to encounter in using the shower curtain?

**Physics**

An electron is accelerated through 2200 V from rest and then enters a region where there is a uniform 1.30 T magnetic field directed perpendicularly to the electron's velocity.

**math**

6 + 3

**math**

A computer technician charges $40 for a house call and $38 per hour. The expression 40 + 38t is used to find the cost of a house call that lasts t hours. What is the cost of a house call that last 3 hours?

**math**

A phone compant uses the expression 1.25 + 0.10m to calculate the cost of a phone call that lasts m minutes. What is the cost of a call that last 20 minutes?

**Calculus 12th grade (double check my work please)**

2 and 3 are right. the first one is a trick question. It is a circle, so the tangent line is always 90 degrees to the radius

**Algebra**

Factor 2xsquared minus 5x minus 3.

**Business Communications**

Thank you, my understanding of when or where to use Ms. was wrong.

**Business Communications**

5: You are attending a professional conference and are privileged to be introduced to Caroline Peters. You know nothing about her except that she is an executive at a very successful company. You have and idea that you would like to talk over with her. How should you address ...

**algebra**

solve using the elimination method x+7y=58 -x+4y=30

**English**

Please find errors and correct them. To all ABC Internet Customers we have resolved the problem we were having with the Internet backbone for Southern Illinois. There was an NAP connection that was having trouble in Atlanta, Georgia. This is been resolved. The speed is much ...

**ENGLISH**

I am confused as where to put the comma at that you stated in the first sentence.

**7th grade math**

the perimeter of a rectangle is 125cm. its length is 3x and its width is 2x. what is x.

**math**

how do i put that in a equation form?

**math**

The quotient of h and -6 is at least 5.

**math**

The product of a number and 7 in not less than 21.

**math**

tom saved $550 to go on a school trip. the cost for a hotel room, including tax, is $80 per night. write and inequality to show the number of nights tom can stay at the hotel.

**math**

dante has at most $12 to spend on entertainment each week. so far this week, he spent $7.50. Write and solve an inequality to determine how much money dante can spend on entertainment the rest of the week.

**math**

dante has at most $12 to spend on entertainment each week. so far this week, he spent $7.50. Write and solve an inequality to determine how much money dante can spend on entertainment the rest of the week.

**math**

the rope James bought with his camping gear is 54 inches long. james needs to cut shorter pieces of rope that are 18 inches long. what are the possible number of pieces james can cut?

**math**

the gas tank in bob's car holds at most 15 gallons. He has already filled the tank with 7 gallons of gas. he will continue to fill the tank with g gallons more. Write and solve an inequality that shows all the values of g that bob can add to the cars tank.

**Chem**

22.8 kg of a metal has a density of 8.3g/mL. Calculate the volume of the metal sample?

**physics**

sqrt(1/8)=ans

**algebra**

A peddler is taking eggs to market to sell. The eggs are in a cart that holds up to 500 eggs. If the eggs are removed from the cart 2, 3, 4, 5,or 6 at a time, one egg is always left over. If the eggs are removed 7 at a time, no eggs are left over. How many eggs are in the cart.

**Stats**

I Have no idea

**math**

Explain how you can multiply 3 times 24 by using arrays. Then give the product.

**Algebra**

What are the solutions of the quadratic equation below? 4x2 - 30x + 45 = 0

**math**

Ricky has a total of 64pennies and quarters in a jar.He has 34 more pennies than quarters.How much money does ricky have in the jar.

**math**

If Juan can consume in one sitting one medium (12-inch diameter), deep-dish (1-inch thick) pizza, what is the minimum volume of his stomach?

**math**

The year 1991 was the last year of the twentieth century whose number is a palindrome, that is, reads the same backward and forward. How many years between the years 2000 and 3000 will be palindromic?

**geography**

in which country khmer rouge establish a brutal regime?

**physics**

A pendulum bob is released from some initial height such that the speed of the bob at the bottom of the swing is 3.2 m/s. The acceleration of gravity is 9.81 m/s 2. What is the initial height of the bob?

**algebra**

In the lab, Jessica has two solutions that contain alcohol and is mixing them with each other. She uses times as much Solution A as Solution B. Solution A is alcohol and Solution B is alcohol. How many milliliters of Solution B does she use, if the resulting mixture has ...

**math**

mr.king, the owner of good morning groceries, wants to make a fence aea to put his carts in at night.he has 68 feet of fencing.what is the largest rectangular area he can fence? ( use only whole numbers)

**physics**

How fast (in rpm) must a centrifuge rotate if a particle 14.0 cm from the axis of rotation is to experience an acceleration of 70,000 g's?

**physics**

An electron and a proton are separated by 2.0 nm. (a) What is the magnitude of the force on the electron? (b) What is the net force on the system?

**algebra**

According to the world almanac, in 1990 there were 41,223,804 students enrolled in full-time day schools and there were 2,397,351 classroom teachers for these students. On average, how many pupils were there per teacher? Round answer to the nearest tenth.

**Algebra**

A revolving restaurant rotates one complete turn every 56 minutes. In the 21 minutes it takes to eat the peaches jubilee dessert, through how many degrees does the restaurant revolve?

**match**

the sum of two times a number and 5 is 11? equation form.

**Business and Administrative Communications**

Just wanted to say thank you very much for your help to Writeacher. I made a 95 on my test. Thanks again.

**Business and Administrative Communications**

Thank you so much. I greatly appreciate it.

**Business and Administrative Communications**

Ok, here is my corrected answers. #3: A #4: A #8: D #9: B

**Business and Administrative Communications**

I forgot the rest of the question on Num. 6. "Hush little baby," my grandfather would often whisper softly to me, "Don't say a word." ("Don't say a word." is underlined) thank you. I'm still thinking on the others.

**Business and Administrative Communications**

I am just not sure about these questions. Any help is greatly appreciated. 1: Identify the sentence with correct subject-verb agreement. A: Although the trend is shifting, careers in science and technology continue to attract predominately men. B: Although the trend is ...

**Algebra 2**

The purity of gold is measured in karats. Twenty-four karat gold is pure gold and k karat gold is k/24 gold by mass. One piece of 16-karat gld jewelry has a mass of 30 grams and another piece of 10-karat gold jewelry has a mass of 40 grams. Find the number of grams in the ...

**Algebra**

What is the probability that a randomly selected three-digit number is divisible by 5? Express answer as a common fraction.

**math**

I need help with my math work

**math**

can some please solve everyone because i do get it. 102,105,111,114,120,123,129,_,_,_,_,_, 201,204,210,213,219

**math**

can some please solve everyone because i do get it. 102,105,111,114,120,123,129,_,_,_,_,_, 201,204,210,213,219

**math**

102,105,111,114,120,123,129,_,_,_,_,_, 201,204,210,213,219 is not +3+6+3+6 TRY it yourself

**Math**

+3+6 is wrong