Friday

July 1, 2016
Total # Posts: 308

**Chemistry**

A scuba diver 60 ft below the ocean surface inhales 55.0 mL of compressed air from a scuba tank at an initial pressure of 2.60 atm and temperature of 8 ∘C. What is the final pressure of air, in atmo-spheres, in the lungs when the gas expands to 155.0 mL at a body ...
*March 24, 2016*

**Math**

One number is 10 less than twice a second number. Find a pair of such numbers so that their product is as small as possible. These two numbers are_ and _. (Use a comma to separate your numbers.) The smallest possible product is_. The number are NOT 5,15 or 15 and 5
*March 12, 2016*

**Algebra**

You plan to build four identical rectangular sheep pens in a row. Each adjacent pair of pens share a fence between them. You have a total of 368 feet of fence to use. Find the dimension of each pen such that you can enclose the maximum area. 5w+8L=368 5w-5w+8L=368-5w 8L/8=368/...
*March 12, 2016*

**Algebra**

incorrect
*March 11, 2016*

**Algebra**

One number is 10 less than twice a second number. Find a pair of such numbers so that their product is as small as possible. I came up with 15 and 5 and those are incorrect
*March 11, 2016*

**Math**

I tried those answer previously and they are incorrect
*March 11, 2016*

**Math**

One number is 10 less than twice a second number.Find a pair of such numbers so that their product is as small as possible. x-10 2x 2x(x-10) 2x^2-20x -(-20/2(2))=5 2(5)^2-20(5) 50-100=-50 I think I am really lost
*March 11, 2016*

**Stats**

A bag has 27 balls in it; numbered 1 through 27; no number repeats. If you select two balls from the bag without replacement what is the probability that both are more than 23?
*February 24, 2016*

**math**

Yes thank you
*February 2, 2016*

**math**

The length is 2 inches and the actual length is 2 miles what is the scale factor?
*February 2, 2016*

**chem**

make an aqueous solution of 0.176 M copper(II) chloride for an experiment in lab, using a 300 mL volumetric flask. How much solid copper(II) chloride should you add
*November 22, 2015*

**none**

Two short legs of right triangle are 16 each. How long is long side
*November 17, 2015*

**Math**

How much farther is it around the bases of a 90 feet diamond than around the bases of a 60 feet diamond
*April 29, 2015*

**Math**

One angle of a triangle measures 105degrees and another angle measures 32degrees what is the measurement of the third angle
*April 29, 2015*

**Math**

What is the volume of two of the buckets?
*March 25, 2015*

**algebra**

The height in feet of a projectile with an initial velocity of 32 feet per second and an initial height of 48 feet is a function of time in seconds given by h(t) = −16t2 + 32t + 48. (a) Find the maximum height of the projectile. ft (b) Find the time t when the projectile...
*December 12, 2014*

**algebra**

A medical researcher wanted to determine the effect of pH (a measure of alkalinity or acidity, with pure water having a pH of 7) on the growth of a bacteria culture. The table below gives the measurements of different cultures, in thousands of bacteria, after 8 hours. pH ...
*December 6, 2014*

**algebra**

Flying with the wind, a plane traveled 570 miles in 3 hours. Flying against the wind, the plane traveled the same distance in 5 hours. Find the rate of the plane in calm air and the rate of the wind. Rate of plane ______mph Rate of wind ________mph
*December 6, 2014*

**algebra**

The fuel efficiency for a certain midsize car is given by E(v)= -0.016v^2+1.408v+3.8, where E(v)is the fuel efficiency in miles per gallon for a car traveling v miles per hour. What speed will yield the maximum fuel efficiency? _______mph. What is the maximum fuel efficiency ...
*December 6, 2014*

**algebra**

The monthly income I, in dollars, from a new product is given by I(t) = 81000 − 45000e^-0.005t where t is the time, in months, since the product was first put on the market. (Round your answers to the nearest dollar amount.) (a) What was the monthly income after the 30th...
*November 18, 2014*

**algebra**

Lead shielding is used to contain radiation. The percentage of a certain radiation that can penetrate x millimeters of lead shielding is given by I(x) = 100e^−1.5x. What percentage of radiation, to the nearest tenth of a percent, will penetrate a lead shield that is 1 ...
*November 18, 2014*

**algebra**

The number of bass in a lake is given by P(t) = 2800/1+6e^-0.05t where t is the number of months that have passed since the lake was stocked with bass. (a) How many bass were in the lake immediately after it was stocked? ? bass (b) How many bass were in the lake 1 year after ...
*November 17, 2014*

**math**

Lead shielding is used to contain radiation. The percentage of a certain radiation that can penetrate x millimeters of lead shielding is given by I(x) = 100e^−1.5x. What percentage of radiation, to the nearest tenth of a percent, will penetrate a lead shield that is 1 ...
*November 17, 2014*

**math**

The monthly income I, in dollars, from a new product is given by I(t) = 81000 − 45000e^-0.005t where t is the time, in months, since the product was first put on the market. (Round your answers to the nearest dollar amount.) (a) What was the monthly income after the 30th...
*November 17, 2014*

**algebra**

A cup of coffee is heated to 180°F and placed in a room that maintains a temperature of 65°F. The temperature of the coffee after t minutes is given by T(t) = 65 + 115e^−0.042t.(a) Find the temperature, to the nearest degree, of the coffee 10 minutes after it is ...
*November 17, 2014*

**algebra**

Lead shielding is used to contain radiation. The percentage of a certain radiation that can penetrate x millimeters of lead shielding is given by I(x) = 100e^−1.5x. What percentage of radiation, to the nearest tenth of a percent, will penetrate a lead shield that is 1 ...
*November 17, 2014*

**algebra**

The monthly income I, in dollars, from a new product is given by I(t) = 81000 − 45000e^-0.005t where t is the time, in months, since the product was first put on the market. (Round your answers to the nearest dollar amount.) (a) What was the monthly income after the 30th...
*November 17, 2014*

**algebra**

The function A(t) = 200e^-0.014t gives the amount of medication, in milligrams, in a patient's bloodstream t minutes after the medication has been injected into the patient's bloodstream. (a) Find the amount of medication, to the nearest milligram, in the patient's...
*November 17, 2014*

**college algebra**

A rental company purchases a truck for $14,500. The truck requires an average cost of $6.75 per day in maintenance. (a) Find a linear function that expresses the total cost C of owning the truck after t days. C(t) = 1
*October 22, 2014*

**stat**

a full scholarship to any student who scores in the top 4% of students on the SMRT standardized exam. SMRT scores have a mean of 260 and a standard deviation of 22. What score does a student need to attain in order to receive the scholarship? this is how I worked it 1.00-.04...
*October 20, 2014*

**algebra**

Rounding 6,156 to the nearest hundred
*October 7, 2014*

**Algebra**

Triangles ABC and DEF are similar. Find the area of triangle ABC. Round your answer to the nearest tenth. Triangle ABC has a base of 12m. Triangle DEF has a base of 18m and height of 12m
*May 7, 2014*

**algebra**

Solve the inequality graph solution 8| x+3/4|<2answers are ,x< -1or x>-1/2, -5/32<x<5/32, -1<x<-1/2, x<-5/32or x>5/32 thank you
*February 25, 2014*

**algebra**

Solve the absolute value equation graph solution 2|3 x-5|-8=8 answers are x=1 5/6or x=5/6, x=1 or x=4 1/3, x=1 5/6or x=4 1/3, x=1 5/6or x=-1 thank you
*February 25, 2014*

**Math**

Yes
*January 30, 2014*

**Physics**

Problem 1 (80 points) Consider a spring of equilibrium length L, lying horizontally in a frictionless trough. The spring has cross sectional area S perpendicular to its length. The trough constrains the motion of the spring so that any wave propagating along the spring is a ...
*January 29, 2014*

**geometry**

if a scale factor of four is used, the points in the image will be eight times as far from the origin as at he pre-image points true or false
*June 28, 2013*

**algebra**

The ball is kicked straight up in the air from 4' off the ground Original velocity is 60' per second How many secs does it take to hit the ground. Do I use complete the square, square root property, quadratic formula, factoring? formula is h= 16tsquared + 60t +4
*May 22, 2013*

**legal writing 2**

i am suppose to write 2 legal memorandum sally bright v. john bright and john bright v. sally bright child custody case. mother wants to take minor child out of the country.
*May 4, 2013*

**legal writing 2**

i need help writing 2 legal memorandum on sally bright v. john bright. custody of minor
*May 4, 2013*

**legal writing 2**

legal writing project 2 sally bright v. john bright
*May 4, 2013*

**computer-assisted legal research part 2**

what is ascii text?
*April 18, 2013*

**chemistry**

In the experiment you have added 50.0 mL of Ni(H2O)6 2+ to the calorimeter. To this you add 5.0 mL of ethlylenediamine and measure the change in temperature of the solution as the reaction proceeds. The temperature increases by 3.4 oC. Calculate the enthalpy (H) for ...
*April 9, 2013*

**Math**

A carpenter agrees to work under the conditions that he is to be paid $5.50 every day he works, but must pay $6.60 every day he does not work. At the end of 30 days he finds he has paid out as much as he has received. How may days did he work?
*April 3, 2013*

** Math**

A merchant visited 3 fairs. At the first, he doubled his money and spent $30; at the second he tripled his money and spent $54; at the third, he quadrupled his money and spent $72, and then had $48 left. How much money had he at the start?
*April 3, 2013*

**Math**

30 flasks--10 full, 10 half-empty, and 10 entirely empty--are to be divided among 3 sons so that flasks and contents should be shared equally. How may this be done?
*April 3, 2013*

**paralegal**

what should you do in writing a memorandum?
*March 30, 2013*

**Math**

Prove: If the hypotenuse and an acute angle of one triangle are congruent respectively to the hypotenuse and an acute angle of another right triangle, then the two triangles are congruent.
*March 26, 2013*

**Math Please Help**

Show that the central cell of a normal magic square of the third order must be occupied by 5. Show that in a normal magic square of the third order 1 can never occur in a corner cell.
*February 27, 2013*

**Math - Please help**

1/3x + 1/8x + 1/4x + 1/5x + 10 + 1 = x
*February 20, 2013*

**Math-Please Help**

That you so much. Archimedes is probably turning over in his grave!!
*February 18, 2013*

**Math-Please Help**

While rummaging, Bernard found a figurine that he believed to be made out of silver. To test his guess, he looked up the density of silver and found it to be 10.5g/cm^3. The figure had a mass of 149 g. To determine its volume, he dropped it into a cylindrical glass of water. ...
*February 18, 2013*

**Math-Please Help**

Thank you!!
*February 18, 2013*

**Math-Please Help**

A piece of iron weighs 45 oz and has a volume of 10 in^3. Determine the density of iron in g/cm^3.
*February 18, 2013*

**Math (PreAlgebra) 8thG**

Multiply: 4/3* 3.14 * 10^2 = 1256/3 = 419 ft^3
*February 18, 2013*

**Math - Please Help**

While rummaging in his great aunt's attic, Bernard found a small figurine that he believed to be made out of silver. To test his guess, he looked up the denisty of silver in his chemistry book and found it to be 10.5 g/cm^3. He found that the figure had a mass of 149 g. To...
*February 18, 2013*

**Math - Please Help**

The surface area of a right circular cylinder is 1200 cm^2 . If the height of the cylinder is twice its diameter, find the dimensionsof the cylinder. I know th formula for SA is SA = 2pir^2 + 2pirh I know h = 2d. I know r = 1/2 d What is h in relations to r? Is is 4r?
*February 18, 2013*

**Math-Please Help**

The arch is made up of equilateral triangular sections with double walls of steel 3 feet apart. Space between the walls is filled with reinforced concrete. Sizes of the sections vary, but a section at the bottom of the Arch has 54-foot sides and is 12 feet tall. About how much...
*February 18, 2013*

**Math - Please Help**

A right circular cone has a volume of 140 in^3. The height of the cone is the same length as the diameter of the base. Find the radius and height.
*February 17, 2013*

**Math - Please Help**

A chunk of oak firewood has a mass of about 2.85 kg and has a volume of 4100 cm^3. Determine the density of oak in g/cm^3.
*February 17, 2013*

**Math**

Associative Property of Multiplication
*February 17, 2013*

**Math**

Please explain (45/4)^2. One boat is headed due east at 20 mph, and one heads due south at 15 mph
*February 10, 2013*

**Math**

Two boats leave a dock at the same time. One heads due east at 20 mph, and one heads due south at 15 mph. How far apart are the two boats after 45 minutes have elapsed?
*February 10, 2013*

**Math--Please Help**

A traverse with five sides has interior angles with the following measures: 121deg 45 min: 118 deg 25 min; 87 deg 32 min; 98deg 34min, and 113 deg 54 min. Does the traverse close? If not, determne the error in the traverse.
*February 4, 2013*

**math**

The LCD is 20. You will get 7 8/20 - 2 15/20. In the fraction, you can't subtract 15 from 8. Therefore you have to borrow 1 from 7. (20/20 = 1--so add 20 to 8, gives 28). 6 28/20 - 2 15/20 = 4 13/20
*February 2, 2013*

**math**

LCD = 40 14 9/40
*February 2, 2013*

**Math**

The LCD is 36. You will get 11 9/36 - 5 32/36. You cannot subtract the fraction, therefore you have to borrow one from the 11 (36/35 = 1 Then add 9 to 36 which gives 45). 10 45/36 - 5 32/36 = 9/36 = 1/4 You have to reduce the fraction.
*February 2, 2013*

**Math**

A circular table has a diameter of 48". The table can be enlarged by inserting two rectangular leaves, each 18" wide and 48" long. What is the area of the expanded table?
*February 2, 2013*

**math help now please**

In a rectangle all angles are right angles, which means they measure 90 degrees.
*February 2, 2013*

**Math--Please help**

Prove that no isosceles right triangle exists whose sides are integers.
*February 2, 2013*

**MATH**

Two angles are complemtary if their sum = 90. Two angles are supplemtary if their sum = 180. 55.1 + 124.9 = 180 55.1 + 119.9 = 175 55.1 + 49.9 = 105 Therefoe 55.1 + 124.9 = 180 are supplements.
*February 2, 2013*

**Math**

The area of a rectangle is 12 and the width is 3/4 the length. What are the dimensions?
*January 31, 2013*

**Math**

Thank you so much!!
*January 31, 2013*

**Math**

Show that z/pq = 1/pr + 1/qr, where r = (p + q)/z Finding decmpositions of a fraction into 2 units as indicated on a paprus written in Greek.
*January 31, 2013*

**Math -- Please Help**

Solve the system xy = 1, x + y =a by using the identity (x - y/2)^2 = (x + y/2)^2 - xy
*January 31, 2013*

**Math-Please Help**

Dimensional Analysis How do you go from 50 kg/m to g/cm?
*January 28, 2013*

**math**

-14s-1 true or false
*January 17, 2013*

**math**

the quotient of n and 5 is 4 times n find equation
*January 17, 2013*

**4th grade math**

Barb is making a bead necklace. She strings 1 white bead, then 3 blue beads, then 1 white bead, and so on. Write the numbers for the first eight beads that are white. What is the rule for the pattern. Please help me explain this to my 4th grader
*January 14, 2013*

**Math--Please Help**

A pizza bx with a square base is to be made from a rectangular sheet of cardboard by cutting six 1-inch square from the corners and the middle sections and folding up the sides. If the area of the base is to be 144 in^2, what size piece of cardboard should be used? Please ...
*January 13, 2013*

**Math Please Help**

A pizza box top with a square base is to be made from a rectangular sheet of cardboard by cutting six 1-inch squares from the corners and the middle sections and folding up the sides. If the area of the base is to 144 in^2, what piece of cardboard should be used. Please ...
*January 13, 2013*

**Math--Please Help**

Please explain how you got 14" x 14"
*January 13, 2013*

**Math--Please Help**

A pizza box with a square base is to be made from a rectangular sheet of cardboard by cutting six 1-inch squares from the corners and the middle sections folding up the sides. If the area of the base is to be 144 in^2, what size piece of cardboard should be used.
*January 13, 2013*

**math**

Multiply: $500.00 x .0045 = $2.25 Remember to move the decimal two places. $500.00 x .0325 = $16.25 Then subtract $16.25 - 2.25 = $14.00 The annual difference will be $14.00
*January 13, 2013*

**Math**

A pizza box with a square base is to be made rom a rectangular sheet of cardborad by cutting six 1-inch squares from the corners and the middle sections and folding up the sides. If area of the base is to be 144 in^2, what piece of cardboard should be used?
*January 12, 2013*

**Math**

7 1/6 7 8/48 6 56/48 -4 5/8 = -4 30/48 = -4 30/48 = 2 26/48 = 2 13/48 First find the LCD LCD is 48 You cannot subtract 8 from 30. So you have to borrow 1. 1 = 48/48. Now 7 becomes 6. Add 8+48 = 56. Now subtract 6 56/48 from 4 30/48 = 2 26/48. Now reduce. The answer is 2 13/24...
*January 12, 2013*

**trig**

angles of elevation to an airplane are measured from the top and the base of a building that is 40 m tall. The angle from the top of the building is 31°, and the angle from the base of the building is 40°. Find the altitude of the airplane. (Round your answer to two ...
*November 28, 2012*

**Math**

What is the reciprocal of .26
*October 31, 2012*

**Chemistry (edit)**

What is wrong with this ionic equation and what is the correct way to write it? Cl2(aq)+ 2K+(aq)+2Br(aq)->Br2(aq)+ 2K+(aq)+ 2Cl-(aq)
*October 7, 2012*

**Chemistry**

What is wrong with this ionic equation and what is the correct way to write it? Cl2(aq)+ 2K+(aq)+2Br(aq)->Br2(aq)+ K+(aq)+ 2Cl-(aq)
*October 7, 2012*

**Chemistry**

I am doing a experiment with ice and i have to discuss the accuracy and precise of an uncertainy measure. How to express that answer.
*September 7, 2012*

**chenistry**

how many calories are required to melt a 135.0g sample of ice at 0.0 c
*September 5, 2012*

**math**

-3/4+7/12-(-5/6) the answer I get is o.6666667.
*July 24, 2012*

**math**

(14d+16+24d)-11+2(3d-2) Please help or give formula.
*July 24, 2012*

**math**

diameter of coin is 26 mm in length find circumference & area of coin.Is 13 the answer for circumference of coin?
*July 23, 2012*

**math**

I'm really confused.Can't seem to getii.
*July 23, 2012*

**math**

diameter of coin is 26 mm inlength.Find circumference & area of coin .
*July 23, 2012*

**math 122**

the probability of having teams that will attract a large crowd is 0.7 and the probability of having good weather is 0.85. find the expected concession sales attractive teams, good weather $480,000 attractive teams bad weather $400,000 Unattractive teams good weather $320,000 ...
*May 6, 2012*

**pre algebra**

how do u know the answers shown on the computer for What do they call the international hoola hoop championships?are correct
*May 3, 2012*

**statistics**

How do you work problems that ask for the standard error of the estimate Sest of the regression line
*March 23, 2012*