# Posts by gary

Total # Posts: 433

algebra
noted

Math
A man can do a certain task in 21 hours, another man can do the task in 28 hours and a boy can do the task in 48 hours. Find how long it will take to do the task if all three work.

Math
noted

Math
In college algebra a student earns an average grade of 86 on his homework and 75 on his quizzes. What final examination grade will give him a total average of 80 if homework 1/10 , quizzes 3/5 and the final examination 3/10?

Math
nice.

Math
The three angles of a triangle are x°, (x + 30)° , (x – 6)° . Find the dimension of each angle.

Math
distance = (rate) (time) Mark rate is 4 kph Kris rate is 6 kph Let the time taken by Kris be ? x And Mark be ? x + 2 Kris = Mark (rate) (time) = (rate) (time) (6) (x) = (4) (x+2) 6x = 4(x+2) 6x = 4x + 8 6x – 4x = 8 2x = 8 x = 4 Kris needs 4 hours

Math
Mark leaves the house for school walking at the rate of 4 km. per hour. Two hours later Kris follows Mark at a walking rate of 6 km. per hour. How long will Kris have to walk to overtake Mark?

Calculus
A population of 1200 badgers grow by 6% every 8 years. How long does it take the population of badgers to grow 2000?

Math
My seven year old was set this question and I was asked to solve. Help please. Here is the question: My number has 5 tens. The ones digit is less than the tens. What could the number be? My solution was 5 x 10 = 50. Then subtract 1 from the tens = 49 is this correct?

Physics
Is this logic correct? Explain why momentum is conserved when a ball bounces off the ground. My logic : The ball strikes the ground with velocity v. As it leaves the ground, its velocity is also v but in the opposite direction.. i.e -v Hence, m*v + m*(-v) = 0. So, momentum is ...

math
name the property that justifies each step 2(3x-4)=8x-11

Statistics
A production line operation is designed to fill cartons with laundry detergent to a mean weight of 32 ounces. A sample of cartons is periodically selected and weighed to determine whether underfilling or overfilling is occurring. If the sample data lead to a conclusion of ...

physics
a sky diver jumps out of a plane that is 3000m above ground with an initial upward speed of 6m/s she free falls for 20s (assume there is no wind at this time)before pulling the cord to activate the parachute she then falls to the ground at a constant downward speed of 5m/s, ...

physics
a person in a hot air balloon ascending vertically at a constant rate of 12m/s drops a rock over the side when the balloon is 40 m above the ground, what is the velocity of the rock just before it hits the ground, and how long will it take the rock to reach the ground

Chemistry
1.06g of Na2CO3 is dissolved in water to make 250cm^3 solution. 10.0 cm^3 of this solution was further diluted to make 500cm^3 of 2nd solution. 25.0cm^3 of 2nd solution reacted with 28.5cm^3 of HCl. Find the concentration of HCl in mol/dm^3

Chemistry
4.80 dm^3 of chlorine gas was reacted with NaOH solution. a) how many moles of Cl2 reacted b) what mass of NaOCl was formed? c) if the concentration of the NaOH was 2.00 mol/dm^3. What volume of sodium hydroxide solution was required? d) write an ionic equation for this reaction

Chemistry
A 1.00 g sample of limestone is allowed to react with 100 cm^3 of 0.200 mol/dm^3 HCl. The excess acid required 24.8 cm^3 of 0.100 mol/dm^3 NaOH solution. Calculate the percentage of calcium carbonate in the limestone

geometry
what would tan be for -1^(9)to the nearest degree? and what would sin -1^(0.62) be to the nearest degree?

English
A humorous folk tale is meant to Entertain and instruck. Yes the answer is D and I got it right and I have the note.

Maths

English
Yes it Is A

politcal science
As of January 2015, how many members of the House of Representatives and the Senate are NOT members of the Democratic or Republican party? 0 123 100 2

politcal science
Which of the following is NOT one of the Republican party factions? Fiscal Conservatives Libertarians Organized labor Neoconservatives

politcal science
Who is the only third-party candidate to win more than 25% of the popular vote? Question 7 options: Millard Fillmore Theodore Roosevelt George Wallace Ralph Nader

politcal science
In Washington's Farewell Address, what type of policy did he advocate when dealing with foreign countries? Question 6 options: Complete isolation for all foreign countries Extensive treaties with other countries Expansion of US power over foreign countries Neutrality in ...

Math
I've done this before :) H/48 = 5/12 Cross multiply 12h = 240 H = 240/12 H = 20 I hope this help whoever is reading this answer :)

Chemistry
How is 4FeS2 + 11O2 = 2Fe2O3 +8SO2 a single replacement reaction?

Math
6.7

Chemistry
The solidified carbon dioxide, dry ice, is used as the refrigerant to temperatures of 78 °C order What physical state of carbon dioxide at 25°C and 1 atm?

Math
Thank you so much Ms. Sue Glad you are here for use ! God bless you

Math
You are ordering a meal and have \$15 to spend . The restaurant charges 6% sales tax. You plan to leave a 15% tip . The equation C = x + 0.06x + 0.15x gives the total cost C of your meal , where x is the cost before tax and tip . What is the maximum amount you can spend before ...

Math
The standard graph in polar coordinates has E at 0' ( o degree ) . The makes N 38 E would be 90'- 38' = 52' and S 47 E at 2700'+ 47'= 314' , or -46 . The difference in angle between the two is 53+46= 99' At 6 PM , two hours have passed . This ...

Calculus
The balance in an account triples in 20 years. Assuming that interest is compounded continuously, what is the annual percentage rate? I found the equation: y=e^(xln3/20) assuming that y0=1 I got 5.64%, is that right?

Math
IF I INVESTED 100 MILLION DOLLARS IN A 4.5 % CD FOR 2 YEARS HOW MUCH WOULD IT BE WORTH AFTER 2 YEARS.

algebra
'<' means smaller than...so what you said is x is smaller than 5000 which means you didn't exceed 5000 which is what the question is asking for.

Thermochemistry
For the combustion of 100. gm of methane, how much heat would be generated?

math
If the path from park rangers station to camp ground is 0.55 miles determine and state to the nearest hundred of a mile.

Chemistry
Give the molecular formula for the following: 1)Methoxy methane 2) Methoxy Ethane 3) Ethoxy ethane

English
passionate and opinionated

Chemistry
What?

Calculus
Let g be a function that is defined for all x, x ≠ 2, such that g(3) = 4 and the derivative of g is g′(x)=(x^2–16)/(x−2), with x ≠ 2. a.Find all values of x where the graph of g has a critical value. b.For each critical value, state whether the ...

Physics
If ∆Q is the heat supplied to a gas so that the internal energy of the system increases by ∆U, then the work done ∆W by the gas is equal to: ∆Q – ∆U ∆Q + ∆U ∆Q x ∆U ∆U/∆Q

Calculus
The local linear approximation of a function f will always be greater than or equal to the function's value if, for all x in an interval containing the point of tangency f '(x) < 0 f '(x) > 0 f "(x) < 0 f "(x) > 0

Calculus
If f is a function such that [(f(b)-f(a))/(b-a)]=2 , then which of the following statements must be true? a.f(a) = f(b) = 2 b.The slope of the tangent line to the function at x = a is 2. c.The average rate of change of the function on the interval [a, b] is 2 d.The linear ...

Calculus
True or False If f is continuous at x = c, then f is differentiable at x = c.

Calculus
The local linear approximation of a function f will always be greater than or equal to the function's value if, for all x in an interval containing the point of tangency f '(x) < 0 f '(x) > 0 f "(x) < 0 f "(x) > 0

POLS210 D001
Please I am in desperate need of finding the answer to pop quiz 4,6,and 8 please is there anyone out there that could help me.

Statistics
Suppose a random family of four is selected (two parents and two children). Suppose further that you are told one of the two children is a girl. Given that this family has at least one daughter, what is the conditional probability that it also has a son? (HINT: write out the ...

Elementary Statistics
10. In a game of “chuck a luck” three dice are rolled. If your number comes up on all three dice you win \$3. If your number comes up on two dice you win \$2. If your number comes up only once you win \$1. If your number doesn’t come up at all you lose \$1. a) What ...

Health
yes it is C , I got it right

math
This is a continuous from my last question Let g be a function that is defined for all x, x ≠ 2, such that g(3) = 4 and the derivative of g is g′(x)=(x^2–16)/(x−2) with x ≠ 2. On what intervals is the graph of g concave down? Justify your answer. ...

math
Let g be a function that is defined for all x, x ≠ 2, such that g(3) = 4 and the derivative of g is g′(x)=(x^2–16)/(x−2) with x ≠ 2. Find all values of x where the graph of g has a critical value. For each critical value, state whether the graph of...

math
True or false? If f is continuous at x = c, then f is differentiable at x = c.

math
Which of the following is the best linear approximation for f(x)equals sin(x) near x equals =π seconds? y=-x+pie-1 y=-1 y=-x-pie y=-x+pie

Math
What is the answer to ( what is the combined height of 3 nickels, 2 nickels, and 1 nickel?

Calculus
For which pair of functions f(x) and g(x) below will the lim f(x)/g(x)equal 0 x-infinity f(x) e^x; g(x) = x^3 f(x) x^5; g(x) = e^x f(x) x^3; g(x) = ln(x) f(x) x^negative 2; g(x) = e^negative x

math
The height of a cylinder with a fixed radius of 10 cm is increasing at the rate of 0.5 cm/min. Find the rate of change of the volume of the cylinder (with respect to time) when the height is 30cm.

math
A rectangular box has a square base with an edge length of x cm and a height of h cm. The volume of the box is given by V = (x^2)h cm^3. Find the rate at which the volume of the box is changing when the edge length of the base is 10 cm, the edge length of the base is ...

math

math
A particle moves along the x-axis so that at any time t, measured in seconds, its position is given by s(t)equals = 5cos(t) minus- sin(3t), measured in feet. What is the acceleration of the particle at time t =equals π seconds?

math, physics
The driver of a car traveling at 60 ft/sec suddenly applies the brakes. The position of the car is s(t) equals 60t minus - 1.5t^2, t seconds after the driver applies the brakes. How many seconds after the driver applies the brakes does the car come to a stop?

math
Would the answer be 2000 to this? with 1,200 i got 4,000? If 600cm^2 of material is available to make a box with a square base and a closed top, find the maximum volume of the box in cubic centimeters.

Math
If 1,200 cm^2 of material is available to make a box with a square base and an open top, find the maximum volume of the box in cubic centimeters. Answer to the nearest cubic centimeter.

Math
A farmer has 2,400 feet of fencing and wants to fence off a rectangular field that borders a straight river. He needs no fence along the river. Write the function that will produce the largest area if x is the short side of the rectangle.

Math
What is the area of the largest rectangle with lower base on the x-axis and upper vertices on the curve y equals= 12 minus x^2?

Math
Thank you!

Math
provide one of the two positive integers whose sum is 200 and whose product is a maximum.

Calculus
1) A rectangular page is to contain 16 square inches of print. The page has to have a 2-inch margin on top and at the bottom and a 2-inch margin on each side. Find the dimensions of the page that minimize the amount of paper used. 2) A rectangular garden of area 480 square ...

Chemistry

Problem Solving
Michael has designated 5% of his paychecks for the year for presents (birthday, Monther's day, etc.) Write a solution to calculate the amount of money he can spread give the amount of money he earns.

Health
it's D .

math
Nicole is making a bowl of chex mix to serve her guests.She has already put 45 cups of nuts.410 cups of raisins and 112 cups of chocolate chips in the bowl,If she wants to make four cups total, how much chex cereal will she need to add?

pre calculus
12. Use the remainder theorem to find P (-2) for P(x) =x^3+2x^2-x-7. Specifically, give the quotient and the remainder for the associated division and the value of P (-2). Quotient =? Remainder =? P (-2) =?

All of the Above Source - Finished my quiz with that same question and got it right.

Health
for your answer alley it is B , this is really easy I think you posted this on purpose .

math
You would have to use 1.75*2pi for a or -0.0052 for d

1210 Math
A projectile follows a parabolic path whose height, in meters, is given by the function f(x) =-x^+2x+2, find the maximum horizontal distance that the projectile may cover

Math
there are 60 pieces of ribbon

Math
yes Amy you are correct

algebra
solve the equation for x -2(2x-2)=2x for y 9x+y=9 solve theinequality 2x-6<8x+18 solve 0.14-0.01(x+2)=-0.02(3-x)

Health

a) 24 cups pineapple (4x6) 48 cups orange juice (8x6) 72 cups seltzer (12x6) b) 81 servings If 12 cups = 9 servings Then 108 cups = 81 servings 12 x 9 = 81 c) ??? .75

math
Given: 20,000 shares cumulative preferred stock (\$2.25 dividend per share): 40,000 shares common stock. Dividends paid: 2013, \$8,000; 2014, 0; and 2015, \$160,000. How much will the preferred stockholders and the common stockholders receive each year?

CHEMISTRY
what do you observe on the seawater where ships dock? Explain in relation with attractive forces and surface tension..

trig
I really have no idea how to find the theta of the angles, help please

trig
The centers of two belt pulleys, with radii of 3 cm and 6 cm, respectively, are 13 cm apart. Find the total area K enclosed by the belt.

Health
Thanks guys for posting this , its really help me . Thanks Ms.Sue , Jackie , audra .

Math 114
I have x=58.8

Math 114
a store mixes kenyan coffee worth \$11 per kilogram and turkish coffee worth \$13 per kilo gram. The mixture is to sell for \$12 per kilogram. Find how much of each should be used to make a 588 kilo mixture.

Health Part 2
yes , it is A

Health Part 2
you guys right , it's D Trust me !

Health Part 2
i'll try that , D . thanks

Science
It is when beavers reproduce and do it hard

health
thank you guys

maths
A car and a van started from two cities at the same time and travelled towards each other at steady speeds. The car took 4 hours to cover the distance between the two cities and the van took 6 hours. After what amount of time did they pass each other? 4.

physical science

chemistry
If 5.6 grams of potassium hydroxide is added to enough water to make 950 ml of solution, what is the concentration of the potassium?

Health
It is AAAAA people

algebra
Use a calculator to evaluate an ordinary annuity formula A = m [ 1+ r over n ^nt -1] than rn is under--____________________ r over n for m, r, and t (respectively). Assume monthly payments. (Round your answer to the nearest cent.) \$150; 6%; 40 yr A = \$

1. Pages:
2. 1
3. 2
4. 3
5. 4
6. 5
7. Next>>