Monday
August 29, 2016

Posts by Andrea

Total # Posts: 803

Math
Is the value of the second 5 in 450,852,137 one-tenth the value of the first 5 ? Explain
August 4, 2016

Socials Studies
Métis Bison hunt rules in Northwest Canada in the 1800s
July 14, 2016

Socials Studies
Why were the rules of the bison hunt so strict? Why might some punishments involve destruction of property? The rules were so strict because it was dangerous and can cause death and serious injuries. Am I right? That's my answer for the first question and I need help on ...
July 14, 2016

Physics
Two 2.46uC point charges are located on the x axis. One is at x = 1.01m, and the other is at x = -1.01m. Determine the electric field on the y axis at y = 0.455m & Calculate the electric force on a -2.82uC charge placed on the y axis at y = 0.455m I'm using E=kq/r^2 and F=...
July 12, 2016

Socials Studies
Thank you for the link Ms. Sue
July 10, 2016

Socials Studies
Greatest risks: - if caught, they will be handed back to their masters - be severely punished - be kidnapped and sold to another master
July 10, 2016

Socials Studies
What do you think were the three greatest risks a fugitive slave might face on the underground railroad?
July 10, 2016

Physics
A playground merry-go-round of radius R = 1.92m has a moment of inertia of I = 221kgm^2 and is rotating at 14.0rev/min about a frictionless vertical axle. Facing the axle, a 29.8kg child hops onto the merry-go-round and manages to sit down on its edge. What is the new angular ...
July 5, 2016

Physics
A ring (hollow cylinder) of mass 2.89kg, inner radius 5.35cm, and outer radius 6.35cm rolls (without slipping) up an inclined plane that makes an angle of θ=35.6°, as shown in the figure below. At the moment the ring is at position x = 1.87m up the plane, its speed is...
July 5, 2016

math
solve the equation:3(x-2)^2-12=0
June 12, 2016

math
I'm really struggling with this word problem, please help. Alex is selling tomatoes. last week he bought some at $20 for 50 tomatoes and sold them (except for 30 rotten ones) at 120c each to make $84 profit. how many tomatoes did he buy?
June 8, 2016

Chemistry
A sample of oxalic acid (H2C2O4, with two acidic protons), of volume 37.09 mL was titrated to the stoichiometric point with 22.41 mL of 0.163 M NaOH(aq). What is the molarity of the oxalic acid? Answer in units of M.
May 29, 2016

Chemistry
A sample of sodium hydroxide of volume 11 mL was titrated to the stoichiometric point with 24.5 mL of 0.138 M HCl(aq). What is the initial molarity of NaOH in the solution? Answer in units of M.
May 29, 2016

Chemistry
If the reaction 2H2O2 →2H2O+O2 has a 45% yield, what is the molarity of the H2O2 solution if 2.5 L of this solution pro- duces 150 g of O2?
May 29, 2016

Chemistry
Suppose that 12.41 mL of 0.169 M NaOH(aq) was required to titrate 0.1579 g of an unknown acid (HX). What is the molar mass of the acid? Answer in units of g/mol.
May 29, 2016

math
your barangay officials are planning to raise funds to help the public library.they decided to sell 4000.00 draw tickets worth 10 each. one ticket will win the prize worth 3,500.00. five tickets will each win a prize worth 700.00 each and three tickets will each win the prize ...
April 28, 2016

Math
The walls are rectangles with a height of 6 feet. A pint of paint covers 50 square feet. How much paint do I need to paint the inside walls R=1.54 for three walls?
April 6, 2016

Math
Karl and his dad are building a playhouse, the floor is a rectangle that is 6 feet by 8 1/2 feet How much carpeting do they need for the floor? P= 6 plus 8.5 *2= 29.0 A= L*W= 6*8.5=51
April 6, 2016

Statistics
Assume that a procedure yields a binomial distribution with a trial repeated n times. Use the binomial probability formula to find the probability of x successes given the probability p of success on a single trial. n=19, x=15 p=.85, find P(15)
April 2, 2016

math
Karen mixed 1/2 cup of orange juice, 3/4 cup of pineapple juive , and 1/3 cup of grapefruit juice. How many cups of juice did she use?? Please help:)
April 1, 2016

math
Janice conducted a survey at the local calculator factory. She discovered that 10% of every 80 calculators did not work. Using this survey, what kind of predictions can she make about the next 400 calculators? a-not enough information b-40 will not work c-5 will not work d-8 ...
March 30, 2016

math
Celia has a large container in which four different kinds of coins are thoroughly mixed. She wants to take a sample of her coins to estimate which kind of coin she has the most. Which of the following methods is the best way for her to select a sample? A]taking coins until she...
March 30, 2016

math
tyson charges $20 per square foot of rug for a basic design. a client orders one basic rectangular-shaped rug that is 6 feet long and 4 feet wide and one basic rug shaped like a parallelogram that is not a rectangle with a base that is 8 feet long and a height that is 3 feet. ...
March 23, 2016

science
how are artificial flavors made
March 9, 2016

science
what is partially hydrogenated soybean oil and how is it made
March 9, 2016

phy 231
Tall buildings are flexible and undergo simple harmonic motion (SMH) when excited by wind. Suppose the top floor of a skyscraper is in SMH, swaying back and forth with a frequency of 0.181 Hz and an amplitude of 1.5 m. a.What is the maximum speed experienced by top floor ...
March 8, 2016

phy 231
A block of mass 0.39 kg connected to a spring with spring constant 30 N/m is oscillating on a frictionless horizontal surface. Its speed as it passes through its equilibrium position is 0.5 m/s. What is the total energy of the system in J?
March 8, 2016

Physics
A slab of ice with parallel surfaces floats on water. What is the angle of refraction of a light ray in water if the light ray is incident on the upper ice surface with an angle of 60° to the normal?
March 4, 2016

grammer
What's the prefix suffix and root meaning of spouting
March 1, 2016

calculus
A ship, proceeding southward on a straight course at the rate of 12 miles/hr is, at noon, 40 miles due north of a second ship, which is sailing west at 15 miles/hr. a) How fast are the ships approaching each other 1 hour later? b) Are the ships approaching each other or are ...
February 27, 2016

calculus
An angler has a fish at the end of his line, which is being reeled in at the rate of 2 feet per second from a bridge 30 feet above the water. At what speed is the fish moving through the water towards the bridge when the amount of line out is 50 feet? (Assume the fish is at ...
February 27, 2016

calculus
The sales(in millions) of a DVD recording of a hit movie t years from the date of release is given by a) Find the rate of which the sales are changing at time t. b) How fast are the sales changing at the time the DVDs are released? c) How fast are the sales changing two years ...
February 27, 2016

calculus
Sand is falling into a conical pile so that the radius of the base of the pile is always equal to one half its altitude. If the sand is falling at the rate of 10 cubic feet per minute, how fast is the altitude of the pile increasing when the pile is 5 feet deep?
February 27, 2016

Calculus
Estimate the area of the plane region bounded by the graph of f(x) = e^x, the x-axis, and the vertical lines x = 0 and x = 8 using the trapezoidal method with trapezoids of equal width. Round your answer to 4 decimal places. I got the answer 6892.7480 but it was incorrect and ...
February 26, 2016

phy 231
A mass-spring system oscillates with an amplitude of 4.00 cm. If the spring constant is 277 N/m and the mass is 573 g, a.determine the mechanical energy of the system. b.Determine the maximum speed of the object. c.Determine the maximum acceleration.
February 20, 2016

phy 231
It takes 23 hours 56 minutes and 4 seconds for the earth to make one revolution (mean sidereal day). a.What is the angular speed of the earth? I got 7.292x10^-5 rad/s b.Assume the earth is spherical. Relative to someone on the rotation axis, what is the linear speed of an ...
February 20, 2016

civics
What was the purpose of the Little rock nine going to the high school?
February 18, 2016

phy 231
An object of mass m1=3.3 kg moving at 4.7 m/s strikes a stationary second object of unknown mass. After an elastic collision, the first object is observed moving at 3.76 m/s at an angle of -41° with respect to the original line of motion. What is the energy of the second ...
February 15, 2016

phy 231
A car of mass 860.0 kg accelerates away from an intersection on a horizontal road. When the car speed is 39.6 km/hr (11.0 m/s), the net power which the engine supplies is 5700.0 W (in addition to the extra power required to make up for air resistance and friction). Calculate ...
February 14, 2016

math
Justin has a total of 50 coins that are all nickels and quarters. He has 10 more nickels than quarters. How many of each coin does Justin have?
February 10, 2016

civics
what is the difference of the sixth and seventh amendment
February 10, 2016

Math lit,business studies,consumer studies,tourism
What career part should i follow
February 10, 2016

Math
I have 6 thousands,12 tens, 9 hundreds, 10 ones and 3 tenths. What number am I? This is a question on my 3rd grade daughters math homework and I'm completely confused. I think it may be 7030.03???
February 9, 2016

PHY 231
Two masses M1 = 6.30 kg and M2 = 3.30 kg are on a frictionless surface, attached by a thin string. A force of 40.3 N pulls on M2 at an angle of 28.5° from the horizontal as shown in the figure. Calculate the tension T in the string.
February 1, 2016

PHY 231
Mass m1 = 11.3 kg is on a horizontal surface. Mass m2 = 5.70 kg hangs freely on a rope which is attached to the first mass. The coefficient of static friction between m1 and the horizontal surface is μs = 0.573, while the coefficient of kinetic friction is μk = 0.130...
January 31, 2016

Global History II
Wow. Thank you for the quick lesson. Appreciate it. Have a good night.
December 29, 2015

Global History II
Russia wanted the waterway? Russia had a stronger army than Turkey. Sorry, got this question for homework and I can't find the answer in my notes or text, and don't remember talking about it in class, been struggling so I turned here
December 29, 2015

Global History II
Oh - so Turkey controlled an important waterway? Then why was Russia threat to them?
December 29, 2015

Global History II
I have no idea. I've been stuck on this one question for two days. I think it's B but I can't find any info to confirm it
December 29, 2015

Global History II
Throughout history, Russia has been a threat to Turkey because Turkey a) ha large supplies of minerals b) shared Russia's religious beliefs c) controlled an important waterway d) was the leader of the Arab states
December 29, 2015

Chemistry
What is the total number of joules of hear needed to change 200g of ice to water at O degree Celcius?
November 21, 2015

alegbra
From a point on a straight road, 2 cars are driven in opposite direction. One care at 69 miles per hour and the other at 27 miles per hour. How many hours will they be 480 miles apart?
November 7, 2015

science
why is it important for a cell to grow before it replicates its DNA?
November 1, 2015

Math
Socks are on sale 4 Pairs for $5. How much would you pay for 8 Pairs of socks?
October 20, 2015

physic
In compressed state, a spring 3.00 meters long hanging from the ceiling has a potential energy of 2.0 joules. If the entire potential energy is used to release a ball of mass 1.2 kilograms vertically downward, then what is the kinetic energy of the ball when it reaches the ...
October 16, 2015

Solving Linear Equations (Math)
The length of a rectangle is 5m shorter than three times the width. The perimeter is 46m. Find the length of each side.
September 24, 2015

IPC
A motorcyclist changes the velocity of his bike from 20.0 meters/second to 35.0 meters/second under a constant acceleration of 4.00 meters/second2. How long does it take the bike to reach the final velocity?
September 23, 2015

math - age problem
3 years ago, Vin’s age is 3 times the age of Paul. At the present, Vin’s age is twice the age of Paul. What would be their age 3 years from now if the sum of their present age is 18?
September 13, 2015

math
1.) 3 years ago, Vin’s age is 3 times the age of Paul. At the present, Vin’s age is twice the age of Paul. What would be their age 3 years from now if the sum of their present age is 18? 2.) Willie bought a jacket for 26.86 pesos. The jacket’s price had been ...
September 13, 2015

algeb
help please :) 1.) 3 years ago, Vin’s age is 3 times the age of Paul. At the present, Vin’s age is twice the age of Paul. What would be their age 3 years from now if the sum of their present age is 18? 2.) Willie bought a jacket for 26.86 pesos. The jacket’s ...
September 13, 2015

math
Insert parentheses to make the statement true; 6 x 5 - 2^2 = 45
September 9, 2015

History
It is A. Increase in tres in exploration.
September 2, 2015

math
Which rate of speed is higher. A car completing a 500-mi race in 3 1/3 hours or a car completing a 300-hours in about 2 1/2 hours
September 1, 2015

Life Science
determing whether expired air contains CO2. 1.Formulate hypothesis 2.Aim 3. a) idependent V, dependent and controlled variables 4. methods step by step 5. observation
August 20, 2015

Chemistry
How many moles of Ag2CrO4 will be produced from 6 moles of AgNO3?
August 1, 2015

HCCC
7/3+1/3y=3y-3
June 27, 2015

algebra
That's wrong. ^
June 22, 2015

Science
some countries
June 19, 2015

Geometry
Find the circumference of a circle with a radius of 6 in. A:6in B:12in C:6 pi in D: 12 pi in
June 1, 2015

Geometry
In a 30,60,90 triangle 1: If b=12, find c 2: If b=3,find a Letter a is on the 90° side, b is on the bottom near 60° and c is near 30°. Could anyone explain how to do this? It's hard to understand from my textbook.
May 19, 2015

Language Arts
By the looks of it it looks like Yep. is correct =) Hope that makes everyone happy xD
May 16, 2015

Geometry
Cross multiplication 20+x = 6 ----- - x 5 Idk how to solve this with 2 x's
May 13, 2015

Geometry
Yes it's a 90, 45 45 triangle. And the letters go like this. A C B
May 12, 2015

Geometry
For questions 38-40 use the triangle. |\ 45° angles for the top of the | \ triangle and the bottom right | \C | \ 38: If a=12, find b | \ 39: If b=2,find c | \ 40: If c=12,find a -------- B. Is this pythagorean Therorem? When I try it that way it's not working out? ...
May 12, 2015

Geometry
Thank you!
May 5, 2015

Geometry
True or False? In an obtuse triangle all the angles are obtuse. I think it's false but I'm not sure.
May 5, 2015

Pre-Calculus
Explain the difference between sin^-1(x) and 1/sin(x), Are there different expressions for both these functions?
April 28, 2015

Geometry
A school's wrestling mat is a square with 50 ft sides. A circle 28 ft in diameter is painted on the mat. No wrestling is allowed outside the circle. Find the area of the part of the mat that is NOT used for wrestling. Use pie=22/7.
April 27, 2015

algebra
solve for x, y and z when 2x + 4y + 2z = 144 4x + y + 0.5z = 120 x + 3y + 4z = 144
April 18, 2015

math (algebra)
An entrepreneur has the following costs and revenue functions: TC = 30 + 3Q and TR = 4Q. Calculate the equilibrium quantity algebraically and graphically at the break-even point.
April 18, 2015

math
that is basically the statement don't understand it too.
April 18, 2015

math
it costs $80 to produce any quantity of output and $1.60 for any additional unit of output. write down the equation and graph the total cost function
April 18, 2015

Chemistry
CaCO3 ----------> CaO + CO2 When 45 grams of calcium carbonate decomposes, how many grams of calcium oxide are produced?
April 16, 2015

cylinder word problem
Caitlin enjoys italian ices with her friends. The place scoops the ices into a cylindrical cup that has a radius of 3 cm and a height of 8 cm. each ice is topped off with a half scoop. Each scoop has a radius of 3 cm. What is the total amount of ice that is in Caitlin's ...
March 24, 2015

Algebra help please
Part A: Divide (16x^5y^4 + 6x^3y - 2x^2y - 24x^2y^4) by -2x^2y. Part B: How would your answer in Part A be affected if the x2 variable in the denominator was just an x? Part C: What is the degree and classification of the polynomial you got in Part A? Is this first part right...
March 18, 2015

Acceleration
How did you do the work? I don't see it, not getting it.
March 5, 2015

Acceleration
I need help with the second part of this question. Please show work so I can see. Thanks. I. The fastest land mammal, the cheetah, can accelerate from 0 mi/hr to 70.0 mi/hr in 3.0 seconds. What is the acceleration of the cheetah? Give your answer in units of mph/sec. I got 23....
March 5, 2015

Economics
Clem Oatley could grow wheat and barley. He could grow 75 bushels of wheat or 125 bushels of barley using the same resources on an acre of his land. The price of wheat is $2.00 per bushel and the price of barley $ 0.80. Show the benefits to Clem from specialization. What ...
February 10, 2015

math work for workeys
Ok so I have an example and I used it for my work. First I'll show the example. Multiply a mixed number with a whole number. 4 times 2 and 1/8 . You multiply 4 times 2 and 4 times 1/8. Get 8 + 4/8. Simplified and got 8 and 1/2. The problem that I got was. You are a lead ...
February 3, 2015

math work for workeys
Ok so I have an example and I used it for my work. First I'll show the example. Multiply a mixed number with a whole number. 4 times 2 and 1/8 . You multiply 4 times 2 and 4 times 1/8. Get 8 + 4/8. Simplified and got 8 and 1/2. The problem that I got was. You are a lead ...
February 3, 2015

Pre-Calculus
find all the maximums of the polynomial f(x)=x^2-8x+11 What is the global (absolute) maximum?
February 3, 2015

Pre-Calculus
Describe the function resulting from reflecting f(x)=x^3+2x^2-x+5 about the x-axis and then the y-axis. Does the order of the reflections matter?
February 3, 2015

chemistry
isotope chromium -51 has a half life of 28 days. If the original sample had a mass of 28.0 grams, what mass of chromium -51 sample remains after 84 days?
December 11, 2014

Math
What is 8 and 2 over 20 minus 6 and 8 over 20 8 2 - 20 8=? 2=? 20=?
November 14, 2014

physics
a boom 4.7 meters,10000 kg, 20 degree angle, find torqe on the pivot i fond force=10000x9.81= 98100 N perpindiclar force = 33552 N torqe = 4.7x33552 = 167695 Nm i am told this is wrong
November 14, 2014

Pre-Calculus
I really need help on this question Simplify the expression by using a Double-Angle formula or a Half-Angle Formula cos^2 0/2-sin^2 0/2
November 12, 2014

math
A plane travels 1020 miles from New York City to Minneapolis in 3.3 hours. The return trip takes 2.75 hours. a. How many times faster is the return trip?
November 3, 2014

statistics
Suppose that in a large population the proportion of people that have a certain disease is 0.01. Use the Poisson approximation to find the probability that at least four people will have the disease in a group of 400 randomly selected people.
November 2, 2014

inequalities
Determine when the function f(x)=3x^3+4x^2-59x-13 is less than 7
October 13, 2014

Chemistry
How many liters of liquid nitrogen are produced when 360.0 L of nitrogen gas is liquified at 77.36 kl
October 9, 2014

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