Tuesday
March 31, 2015

Posts by Grace


Total # Posts: 413

life orientation
6 ways in which earthquake can impact negatively on one's health
May 14, 2013

math
0.21 x 63 = 13.23
May 9, 2013

Math
A lighthouse is east of a Coast Guard patrol boat. The Coast Guard station is 20 km north of the lighthouse. The radar officer aboard the boat measures the angle between the lighthouse and the station to be 23°. How far is the boat from the station?
May 8, 2013

Chemistry
When I solve for H^+ I put 1.7 x10^-3 x 0.26. I got 4.42 x 10^-4. My pH is 3.35. Is that right?
April 16, 2013

Chemistry
Substance X (MW=356gm) is a weak acid. Its Ka is 1.7x10^-3. Calculate pH of725ml of the following solutions: a)Containing 0.187 mol of substance x b)containing 127gm of Substance x I have been trying to figure this problem out for hours now and do not get it. Please help me ...
April 16, 2013

Chemistry
Does that mean that I do not need to do an ICE table but just use the HH equation?
April 16, 2013

Chemistry
Calculate the pH of the following buffer solution that resulted from 125ml of 0.1M NH3 with 250ml 0.1 M NH4Cl ( for NH3, Kb= 1.76x10^-5)
April 16, 2013

Chemistry
Calculate the pH of the following buffer solution that resulted from 125ml of 0.1M NH3 with 250ml 0.1 M NH4Cl ( for NH3, Kb= 1.76x10^-5)
April 16, 2013

Chemistry
Three metals P,Q and R form three ionic solids with three nonmetals X,Y, ands Z respectively as follows P2X, QY2, and RZ3. If their molar solubilities are the same, how are their Ksp values related? Please not only explain but write the respective dissociation.
April 16, 2013

algebra 2 (permutations & combinations)
from a standard deck of 52 cards, how many different five-card hands can be drawn?
April 10, 2013

science
tundra
April 4, 2013

Math
What property is this? 4(7+9)=(4x7)+(4x9)
April 2, 2013

Math
One half of 9.76
April 2, 2013

Math
The sunglasses that Ramon wants to buy are 50% off the original price of 85$ .How much did he have to pay?
April 2, 2013

Math
What is a attribute?
April 2, 2013

Chemistry
When 50.0ml of 1.00M HCl is titrated with 1.00M NaOH, the pH increases. calculate the difference in pH of the system when you add 49.99ml NaOH and 50.01ml of NaOH. Please work out detailed steps.
March 29, 2013

Chemistry
You have two buffer solutions 1) weak acid and its conjugate base 2)weak base and its conjugate acid. Write explicitly ( considering generic formula for acid and base) the equations of neutralization when you: a) add strong acid and strong base 1) b) add strong acid or strong ...
March 29, 2013

Math
6 quarters, 4 dimes, 3 nickels, 10 pennies. what is the probability you will get at least one of each coin in change of 1 dollar
March 26, 2013

chemistry
what is the total heat lost if you have 8 grams of copper and the temperature changed from 43°C to 36°C
March 24, 2013

Statistics
A national caterer determined that 87% of the people who sampled their food said that it was delicious. A random sample of 144 people is obtained from a population of 5000. The 144 people are asked to sample the caterer's food. If sample proportion, P^, is the sample ...
March 22, 2013

NJHS (essay)
hi, i'm currently applying for the national junior honor society, and i'm working on my essay. any ideas what i should include??? ps. i have no leadership experience and the section is blank! D:
March 20, 2013

Statistics
Suppose a basketball player is an excellent free throw shooter and makes 90% of his free throws (i.e., he has a 90% chance of making a single free throw). Assume that free throw shots are independent of one another. Suppose this player gets to shoot three free throws. Find the...
March 17, 2013

Basic Math Venn Diagram
Hi! Having a lot of trouble with this one problem. The venn diagram problem is n(U)-n(B). I realize I did not post the venn diagram, I just need to know how to solve that type of problem using a venn diagram! Help would be greatly appreciated. : ) Thank you so much!! God ...
March 7, 2013

Math
Thx that really helped😄😃😜😝👍👍❕👏🎓🆗🆕🔝🆒 freind bump🆙
March 7, 2013

Math
I don't know what 4r=96 means. Also I don't know what 51=3n means!😰😁😱😨📝HELP! It's due tomorrow
March 7, 2013

Physics
A uniform ladder of 5.0 m long and 12 kg is leaning against the wall (contact with the wall = point b, contact with the floor = point a). The height from the ground to point b is 4m . The wall is frictionless but the floor is not. A painter of 55 kg climbs 75% of the way up ...
February 24, 2013

MATH
if 5 times a certain integer ìs subtracted from twice the square of the integer the result is 63. find the integer
February 8, 2013

Algebra 1
In 1991, the federal minimum wage rate was $4.25 per hour. In 1997, it was increased to $5.15. Find the annual rate of change in the federal minimum wage rate from 1991 to 1997.
February 7, 2013

Macroeconomics
If the economy is at point C what is the cost of one more automobile? One more forklift?
January 31, 2013

chemistry
a sample of sulphuric acid is 95.7% by mass and has a density of 1.84g/cubic cm.calculate the mass of pure H2SO4 in a 2.00L bottle and volume of acid that contain 200g of pure H2SO4.
January 26, 2013

Environmental Biology
Identify two different types of businesses or corporations (be as specific as possible) that receive subsidies, through which it could be argued that environmental damage is a result. Briefly describe the environmental damage for each.
January 19, 2013

solid mensuration
what is the area of a section bounded by a closed elliptical figure in which the major and minor segments measure 60 cm and 45 cm
January 11, 2013

Physics...Help!!!
given that Earth's surface gravitaitional field strength has a magnitude of 9.80N/kg, determine the distance(as a multiple of Earth's radius re) above the Earth's surface at which the magnitude of the field strength is 3.20N/kg.
December 20, 2012

Economics
If businesses believe consumption will increase six months from now, everything else held constant, and they begin to increase investment, what do you predict will happen to aggregate demand?
December 10, 2012

Chemistry
Devise a test to distinguish between Cu2+ and Co2+.
November 19, 2012

Chemistry
Devise a test to distinguish between Cu2+ and Co2+.
November 19, 2012

Chemistry II
Devise a test to distinguish between Cu2+ and Co2+.
November 19, 2012

science
what do oxygen and sugars do in photosynthesis
November 17, 2012

Algebra
Task Type: Individual Project Deliverable Length: 3 Parts: See Assignment Details Points Possible: 150 Due Date: 11/5/2012 11:59:59 PM CT Weekly tasks or assignments (Individual or Group Projects) will be due by Monday and late submissions will be assigned a late penalty in ...
November 13, 2012

math
Can someone please help me? I don't know how to work this out, and my friends don't either. Eight hot dogs and ten buns come in separate packages. a. Is the number of hot dog packages proportional to the number of hot dogs? Explain. b. Is the number of hot dogs per ...
October 28, 2012

calculus
Write a formula for f^-1 (x) if f(x) = (x+5)/(3x-4) and state the domain of F^-1
October 27, 2012

art need help
Yeah! Connections Academy Questions!!! I need em all!!! Halp!!! The text book is poop on my Mac.
October 23, 2012

physics
The maximum speed of a child on a swing is 4.90 m/s. The child's height above the ground is 0.525 m at the lowest point in his motion. How high above the ground is he at his highest point?
October 11, 2012

Math
I really need help
October 4, 2012

BIS 245 lab
need help
September 27, 2012

physics
A passenger on a moving train tosses a coin with an initial velocity of (-2.25 m/s)x unit vector + 4.26 m/s)y unit vector (from the point of view of the passenger). The train's velocity relative to the ground is (11.5 m/s)x unit vector. (a) What is the minimum speed of the...
September 16, 2012

Math
There are 36 students in Mrs. Keaton's sixth grade class. If 5/12 of her students are girls, how many girls are in the class? Thanks :-)
September 11, 2012

math
al has twice as many baseball cards as frank and four times as many football cards as joe. the expression 2x+4y can be used to show the total number of baseball and football cards Al has. If the answer is y, then what is the question?
August 17, 2012

Math
a jar contains green,red,and blue marbles.The probability of choosing a blue marble is 1/3, the probability of choosing a red marble is 1/2,the probability of choosing a green marble is 1/6.If there are 12 marbles in the jar,and then three green marbles are added,what is the ...
August 15, 2012

Math
If x-2y-z=2,x-y+2z=9 and 2x+y+z=3,then z=?
August 13, 2012

Math
the cube has a volume of 8.If point x,the midpoint of AV is joined to point y, the midpoint of edge CD what is the length of the shortest distance from x to y?
August 8, 2012

Math
John will have to make 180 monthly mortgage payments and the first payment was made on January 15,1989.If he makes one payment each month,in what year will John make his last payment?
August 8, 2012

Math
John will have to make 180 monthly mortgage payments and the first payment was made on January 15,1989.If he makes one payment each month,in what year will John make his last payment?
August 8, 2012

Math
If the average of 10 numbers is 10 and the sum of five of the numbers is -25 what is the average of the other 5 numbers?
August 7, 2012

Math
A professional basketball team has won 50 out of the 75 games played so far.The team still has 45 games to play.How many of these games must the team play in order to have a season record of winning 60% of the games played?
August 7, 2012

math
If the surface area of a cube is 150e2 what is the volume of the cube?
August 6, 2012

Math
If x-1/3y=3, then the value of 3x-y-6=? a) 15 b) 9 c) 6 d) 3 e) 0
August 6, 2012

Math
Thank You
August 6, 2012

Math
oh i read the question wrong I got D
August 6, 2012

Math
i got E
August 6, 2012

Math
Brian rode his motorbike for 3 hours at 50 miles per hour and then rode the next 200 miles in 5 hours.What is the total distance he traveled? a)150 b)190 c)250 d)350 e)1150
August 6, 2012

Math
1)If a (theres a square)b is defined as the average of a and b, what is the value of 2 (theres a square) 4 (theres a square) 9? a) 3 b)5 c) 6 d)7.5 e) 18 2)If A=(r+s)F, what is the average of r and s when A=8 and F=2? 3) For the three numbers a,j,k, (a<j<k),the ...
August 5, 2012

Math
1) Mr.Anderson has 3 passenger seats in his car.He offered to drive some of the 5 members of his daughter's club to the movies. How many different groups of 3 passengers could he drive? 2) A jar has green and red marbles.If the ratio of green to red is 3:2,what is the ...
August 5, 2012

Math
Given (a+2,a-2)= a for all integers a, (6,2)= a) 3 b) 4 c) 5 d) 6 e) 8 The cost of a drive-in movie is $y per vehicle. A group of friends in a van shared the admission cost by paying $0.40 each.If 6 more friends had gone along,everyone would have paid only $0.25 each. What is ...
August 2, 2012

math
A certain store is selling an $80 radio $64. If a different radio had a list price of $200 and was discounted at 1.5 times the percent discount on the $80 model, what would its selling price be? a) $90 b) $105 c) $120 d) $140 e) $160
August 2, 2012

math
A certain printer can print at the rate of 80 characters per sound, and there is an average of 2,400 characters per page.If the printer continued to print at this rate, how many minutes would it take to print an M-page report? a) m/30 b) m/60 c) m/2 d) 2/m e) 60/m
August 2, 2012

Math
If point A is (-3,-2) and point B is (5,5) then what is the length of segment AB to the nearest tenth?
August 2, 2012

Math
The radius of the small circle A is one-half the radius of the large circle B.WHat is the ratio of the area of the small circle to the area of the large circle?
July 31, 2012

Math
If a line L with a slope of -2/5 passes through the points (5,0) and (x,-2) then what is the value of x?
July 31, 2012

Math
To the nearest tenth,what is the circumference of a circle with an area of 49pi?
July 31, 2012

Math
If Jack's house is 7.1 miles due north of the Senior Citizen Center and Belinda's house is 6.3 miles due west of it, then to the nearest tenth,what is the shortest distance between their houses?
July 31, 2012

Math
a square in a circle with a radius of 2 pi .What is the perimeter of the square?
July 31, 2012

math
13/225
July 30, 2012

math
What is the probability that a randomly selected three-digit number has the property that one digit is equal to the product of the other two? Express your answer as a common fraction.
July 30, 2012

math
if there are 10 more girls than boys in a club with 60 members, how many are boys?
June 28, 2012

math
35/27
June 25, 2012

Pre algebra
How do I solve Quadratic equations by factoring? (for example how would I solve n2 - 10n = -21 if I was supposed to get the answers 7 and 3?
June 7, 2012

Humanities
Explain the focus on the idea of natural law as an extension of human nature during the conclusion of the seventeenth century.
June 7, 2012

Math
Carl owe the workers 80hours pay 2 days at 8hours a day is 16 hours day (3)work only 4 hours Total hours work 20 " for 4 workers working 20 hours =20 X 4 =80 hours pay
June 7, 2012

Science
Please may you find a labeled diagram of a weather thermometer.
May 27, 2012

Math
How do you simplify products of radicals? Please help!
May 24, 2012

statistics
On an exam whose scores followed a normal distribution, a student's z-score was +2. What percentage of students scored better than he did? (Use the 68-95-99.7 Rule.)
April 25, 2012

noun
if two dices are tossed together, the probability that the product will be less or equal to 18 what?
April 24, 2012

Chemistry
Are hybridized orbitals used to explain the fact that the four bonds in methane are equivalent? If not, what is?
April 16, 2012

Chemistry
The pH of a 0.100 M solution of an aqueous weak acid (HA) is 4.00. What would the Ka for the weak acid be?
April 16, 2012

physics
tommy builds a human sling shot that has an elastic constant of 4000 N/m. He puts his little sister in it and pulls it back for 5 meters. How much energy does his 25 kg sister have as she leaves the sling shot and how fast is she flying?
March 27, 2012

maths
Please I want to know how many litres make a metric tone.
March 25, 2012

STATISTICS
.868
March 19, 2012

physics
How would one plug the gravitational constant into an equation? To be honest, I'm having a hard time with the idea of the gravitational constant in general, but I need to solve an equation for the circular velocity of a galaxy. I know I need to multiply the gravitational ...
March 8, 2012

6th Grade Math
Simon went to the store to buy new school supplies. Simon spent 1/4 of his money on pencils and paper and 1/2 of his money on a backpack. If Simon has $12.50 leftover, how much did the backpack cost?
March 4, 2012

Math
There are 24 students in Mrs.Smith's 1st block class. 1/4 of the class passed the math test with an A. 12 students in the class passed the math test with a B. What percent of the students in the class passed the test?
March 1, 2012

Math
There are 24 students in Mrs.Smith's 1st block class. 1/4 of the class passed the math test with an A. 12 students in the class passed the math test with a B. What percent of the students in the class passed the test? ****** This is how I slove the problem, but I stuck in ...
March 1, 2012

physical science
120ml of a solution whose concentration is 30g/ml was diluted with distilled water by raising its volume to 160cm3. Calculate the concentration of the new solution.
February 25, 2012

Algebra 2
did you ever get this answer?
February 21, 2012

math
I have a question. I think I'm wrong, so I want to ask if it's right. If I do 3/4 x 1 5/6 x 7/4 x (-2 3/8) would the answer be negative?
February 6, 2012

Math
Given h(r) = 1/(r + 2), find: h(x^2) + 1 Thank You
February 4, 2012

math
the chef at a restaurant bought 37 pounds of salad for $46.25. how much did she pay for 1 pound of salad
January 30, 2012

chemistry
9.5 g Butane + 34.0 g Oxygen = 43.5 Then 43.5 - 28.7 g CO2 = 14.8 That is the answer: 14.8 g
January 22, 2012

Precalc
An ellipse has this Cartesian equation: ((x-2)/5)^2 + ((y-4)/3)^2 = 1 Find the focal radius Find the eccentricity Write the parametric equations for the ellipse Transform into the form, Ax^2 + By^2 + Cx + Dy + E = 0
January 20, 2012

Precalc
A hyperbola has this Cartesian equation: -((x-2)/5)^2 + ((y+1)/3)^2 = 1 A. Find direction in which it opens. Horizontal? B. Find the coordinates of the center. I think it's (-2,1) or (1,-2)? C. Find the slopes of the asymptotes: m=+- ?
January 20, 2012

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