Friday
December 9, 2016

Posts by Barb

Total # Posts: 312

Liature
Identify Parts of Speech in A city must be planned Carefully, or people will not want to live in it.
September 1, 2016

chemistry
what happens to water at 100 degrees celsius as pressure is increased fro 0.8 atm to 1.2 atm?
July 19, 2016

chemistry
How many grams of Mg(OH)2 would be produced from 4 mol KOH? if the balanced reaction is MgCl2 +2KOH arrow Mg(OH)2 + 2KCl?
July 12, 2016

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

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