Sunday
December 21, 2014

Posts by Grant


Total # Posts: 76

calculus
If sec x = -3, 0 < x < pi, find cot x.
December 4, 2014

Physics, Help!! URGENT!!!
A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is his wavelength at this speed if his mass is 84.5 kg?
October 5, 2014

Physics
Traumatic brain injury such as concussion results when the head undergoes a very large acceleration. Generally, an acceleration less than 800 m/s2 lasting for any length of time will not cause injury, whereas an acceleration greater than 1000 m/s2 lasting for at least 1 ms ...
September 2, 2014

Physics
A 54.0-g Super Ball traveling at 29.0 m/s bounces off a brick wall and rebounds at 18.0 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 4.00 ms, what is the magnitude of the average acceleration of the ball during this time interval in ...
September 2, 2014

math
A board is 84 cm long. How many meters long is this board?
June 10, 2014

Physics
The displacement, force, velocity, and acceleration vectors’ components are given. Calculate the magnitude and direction of each vector. (a) x = +15.0 cm, y = -12.3 cm. I am completely lost.
June 4, 2014

Physics
Looking up the answers will not help you on the physics test. Try looking in your book or reading guides for additional help.
March 12, 2014

Chemistry
Chloroform CHCl is an important solvent. It is produced by a reaction between methane and chlorine. How many g CH4 are needed to produce 50.0g CH4 +Cl3+ CH_4 + 3Cl_2 ->CHCl_3 + 3HCl}
February 10, 2014

Chemistry
2 SO2 (g) + O2 (g) → 2 SO3­↑ Assuming STP, how many grams of oxygen are needed to produce 19.8 liters of SO3?
February 10, 2014

science
What are the measurable causes of weather and how does it impact our world?
December 29, 2013

chemistry
how many grams of chromium are required to react with 125 mL of 0.75M CuSO4?
December 16, 2013

Algebra, HELP IM CLUELESS
Eureka is 16 years younger than Renton. In 3 years Renton will be twice as old as Eureka. How old are they now? Eureka's Age: Renton's Age:
September 7, 2013

Integrals
Evaluate the integral of ∫(2x^2 −3)^2 dx
May 20, 2013

calculus
For the function f(x) = 3x2 − 5x − 7. Find the rate of change of f(x) at x = 3
May 20, 2013

statistics
Idiocracy. It's not a movie.
May 18, 2013

calculus
The marginal cost for a product is given by dC/dq = 1000/sqrt3q+20, in hundreds of dollars, where q is given in thousands of units. Determine the cost in dollars involved in increasing product from 10 to 15 thousand units. If R(0)= C(0)= 0, the marginal revenue is given by dR/...
May 14, 2013

Calculus
Fuel is flowing into a storage tank which can be filled to a depth of 6 metres. When the fuel started flowing the tank was already filled to a depth of 2.5m. If the rate at which the depth of fuel in the tank is increasing, in metres per hour is given by d'(t) = 4t +5, ...
May 14, 2013

Calculus
Fuel is flowing into a storage tank which can be filled to a depth of 6 metres. When the fuel started flowing the tank was already filled to a depth of 2.5m. If the rate at which the depth of fuel in the tank is increasing, in metres per hour is given by d'(t) = 4t +5, ...
May 13, 2013

Calculus
The marginal cost for a product is given by dC/dq = 1000/sqrt3q+20, in hundreds of dollars, where q is given in thousands of units. Determine the cost in dollars involved in increasing product from 10 to 15 thousand units. If R(0)= C(0)= 0, the marginal revenue is given by dR/...
May 13, 2013

Calculus
The acceleration due to gravity near the surface of Mars is 3.72ms^-2 . A rock is thrown straight up from the surface with an initial velocity of 23ms^-2 . How high does it go?
May 13, 2013

Calculus
Given f(x)=1+2cos x , find the area under the curve y=f(x) between x = pi/2 and 2pi/3.
May 13, 2013

Calculus
A cone is inscribed in a sphere of radius a, centred at the origin. The height of the cone is x and the radius of the base of the cone is r, as shown in the diagram opposite. Find the height, x, for which the volume of the cone is a maximum. (HINT: show that the volume of the ...
May 6, 2013

Calculus
A function is implicitly defined by x^2 - 4y^2 = 9 Find the equation of the tangent to the function at x = 1
May 6, 2013

Calculus
Given the function f (x) = 3cos x for the interval 0 < x < 2 sketch the graph of the function
May 3, 2013

calculus
Given the function f (x) = 3cos x for the interval 0 < x < 2pi, determine the concavity of the function, between the critical values
May 3, 2013

Calculus
Use Newton’s method to approximate the root of x^2 + 4x + 2 = 0 between x = -4 and x = -3 .
May 3, 2013

math
A ladder 10 m long rests on horizontal ground and leans against a vertical wall. The foot of the ladder is pulled away from the wall at 2 m/s. How fast is the top sliding down the wall when the foot of the ladder is 6m from the wall?
May 3, 2013

science
how many milliliters of 5.5M H2so4 must you use to prepare 500ml of 0.2M sulfuric acid solution? Please hurry!!!!!!
December 14, 2012

social studies
Please help! this is my worst subject! How did land-owning companies take advantage of the Homestead Act?
December 9, 2012

Chemistry
0.189
November 20, 2012

math
WHAT IS THE ANSWER TO THIS PROBLEM? (WRITE TWO DIFFERENT NUMBERS WHEN ROUNDED TO THE NEAREST TENTH EQUALS 18.3
September 26, 2012

physics
A cement block accidentally falls from rest from the ledge of a 52.0 -m-high building. When the block is 11.5 m above the ground, a man, 1.80 m tall, looks up and notices that the block is directly above him. How much time, at most, does the man have to get out of the way?
September 6, 2012

statistics
How do you calculate the slope and intercept of a regression?
May 22, 2012

math
What is the scientific notation for 15 x 10 to the 5th?
February 26, 2012

Calc 1
Answer is 12250
February 24, 2012

Calc 1
A farmer with 700 ft of fencing wants to enclose a rectangular area and then divide it into four pens with fencing parallel to one side of the rectangle. What is the largest possible total area of the four pens?
February 24, 2012

chemistry
How do you properly solve _ Ag + _ Cu(Nu3)2 ---> _ AgNo3 + _ Cu
December 17, 2011

Math
3/20
December 5, 2011

physics
suppose a plane drops water from 1024 feet. how many seconds will it take for the water to hit the ground?
October 19, 2011

science
what nutrient works as a muscle builder and body repair worker
October 18, 2011

Chemistry
The answer is 5.73 moles Au
September 25, 2011

Bio
What role does DNA play in helicase?
January 26, 2011

alegbra
48 programs
October 21, 2010

alegbra
megan paid 1.50 each for programs to the game. she sold all but 20 of her programs for 4.00 each. even factoring in the money she lost for not selling all the programs, she still made a profit of 45.00. how many programs did megan buy in the first place?
October 21, 2010

Calculus
Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=0, y=x(3-x) about the axis x = 0
August 2, 2010

Physics: Sound Waves
Going to be about 1-2 hertz fyi, 345/pipe1 345/pipe2 and difference
July 16, 2010

apush
Ya, the answer is D
April 9, 2010

chemistry
if 5g of CH3COOH reacts how many moles of CO2 will be produced?
February 16, 2010

chemistry
What volume (in mL)of 0.0550 M calcium hydroxide is required to neutralize 38.00 mL of 0.0700 M nitric acid?
September 30, 2009

chemistry
What volume (in mL) of the base will react completely with 30.00 mL of 0.550 M HCl? 0.0500 M Ba(OH)2
September 30, 2009

chemistry
Bornite (Cu3FeS3) is a copper ore used in the production of copper. When heated, the following reaction occurs. 2 Cu3FeS3(s) + 7 O2(g) 6 Cu(s) + 2 FeO(s) + 6 SO2(g) If 3.88 metric tons of bornite is reacted with excess O2 and the process has an 75.6% yield of copper, what mass...
September 9, 2009

chemistry
Nitrogen (N2) and hydrogen (H2) react to form ammonia (NH3). Consider a mixture of six nitrogen molecules and six hydrogen molecules in a closed container. Assuming the reaction goes to completion, what will the final product mixture be? number of NH3 molecules? number of N2 ...
September 9, 2009

math-word probblem
Case Eastern Junior College awarded 26 varsity letters in crew, 15 in swimming, and 16 in soccer. If awards went to 46 students and only 2 lettered in all sports, how many students lettered in two of the three sports? is the answe 13 lettered
August 9, 2009

math
how do i solve y less than or equal to -2x+1
February 23, 2009

Physics
so i would do.. 23N - friction= 3.1(or 30.38N) *.5 and get f=7.81 then 7.81 = mu k * mu g ?
October 30, 2008

Physics
A force of 23.0 N is required to start a 3.1 kg box moving across a horizontal concrete floor. (a) What is the coefficient of static friction between the box and the floor? (b) If the 23.0 N force continues, the box accelerates at 0.50 m/s2. What is the coefficient of kinetic ...
October 30, 2008

science/biology
how will a goldfish respond if i put it in salt water
September 30, 2008

science
What is phmpoc?
August 19, 2008

math... help me.. please =)
well i think it's 1) 4x sq.root7 2) 5x just basically sq. root them(for the exponent divide by the root(since its square root it's 2 you divide by)
May 11, 2008

Chemistry
Kirsten is in her lab, and reacts two unknown gases (A(g) and B(g)) to get nitrogen dioxide (NO2). Using her data, she is able to write the following balanced equation: 2A(g) + B(g) --> 2NO2(g) If she started with 8 L of A(g) and 3 L of B(g), how many liters of NO2(g) would...
December 2, 2007

Chemistry
I'm not doing so well in ap chemistry. i think i'm not studying the right way. can anyone suggest how i can raise my grade? i do my homework but it doesn't seem to help.
October 14, 2007

Science
If your house is heated by a furnace that blows hot air into the rooms, you are depending on the process of ______ to stay warm. Choices are: convection, radiation,conduction, heat
October 2, 2007

math
yo just give me the answer straight cause i have no idea what that means
September 26, 2007

math
-2x + 4(2x - 9)
September 26, 2007

maths
Thanks Bob, but I dont need the formular just the answer. Once again thank you
September 23, 2007

maths
How far does a train travel going at 20mph for 45 seconds? And har far will it travel at 13mph for 58 seconds? Thanks
September 23, 2007

math
which 3 are correct a) if x= -10^4 then log10 x = -4 b)if x= 2^8 then log 2x = 8 c) log2 2= 4 d) if x= 3 then log10 3=x e) log 10 256-2log 10 16=0 f)log 10 (a-b)= log 10 a/log 10 b g) the gradient of the graph of y= 2e^x at x= 2 is 2e^2 h) the gradient of the graph of y= e^x ...
May 12, 2007

math help
Posted by grant on Saturday, May 12, 2007 at 9:20am. The table shows the depth (d metres) of water in a harbour at certain times (t hours) after midnight on a particular day. time t (hours) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 and the in the next column corresponding to the figures...
May 12, 2007

math
The table shows the depth (d metres) of water in a harbour at certain times (t hours) after midnight on a particular day. time t (hours) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 and the in the next column corresponding to the figures above is depth d (m) 3.0 3.3 4.2 5.6 7.2 8.2 9.0 8.9...
May 12, 2007

math
The table shows the depth (d metres) of water in a harbour at certain times (t hours) after midnight on a particular day. Time t (hours) Depth d (m) 0 3.0 1 3.3 2 4.2 3 5.6 4 7.2 5 8.2 6 9.0 7 8.9 8 8.1 9 7.3 10 5.6 11 4.3 12 3.5 13 3.1 Use the regression facilities on your ...
May 12, 2007

Career Question
Hi everyone, I've got a career-related question. A few weeks ago, our class took a "Career Cruising" quiz, which is meant to help students explore career options that correspond to their interests and talents. Based on my quiz answers, my homeroom teacher ...
March 8, 2007

Quantum Physics
Each element has a different set of energy levels. Use this fact to "explain" whay the colour of the light emitted by an element in the gaseous state is characteristic of the element. When an electron falls from one of the higher energy levels to a lower energy level...
March 6, 2007

Science
A drop of oil (volume 0.05cm3) is released from a medicine dropper on to the calm surface of a pond where it spreads out to cover an area of "40cm2". Assume that the oil film has a uniform thickness equal to the diameter of a oil molecule. Calculate the diameter of ...
March 6, 2007

French
what does trousse mean in French?
January 13, 2007

Math: Checkboard Squares
In the formula how do you know to divide by six?
October 30, 2006

Distributive property
I NEED HELP
September 20, 2006

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