Sunday

October 23, 2016
Total # Posts: 1,344

**Physics**

A biophysics student measures her reaction time by having a friend drop a meterstick between her fingers. The meterstick falls 0.300 meters before she catches it. (a) What is her reaction time? (b) Estimate the minimum average speed of nerve impulses going from her eye to her ...

*January 25, 2016*

**geometry h**

The midpoint of Line AB has coordinates (-3,2) and the coordinates of point A are (1.4). What are the coordinates of point B?

*January 14, 2016*

**math**

y= mx + b (1/2) is the slope. m in the equation is the slope (0,5) x= 0 y or b= 0 y=1/2x + 5

*January 14, 2016*

**MATH HELP !!!!!**

Wow... thank you so much! Because I was wondering because I take health and it meets twice a cycle.

*December 19, 2015*

**MATH HELP !!!!!**

60 classes?

*December 19, 2015*

**MATH HELP !!!!!**

There are 180 days of school; 40 weeks. You have a six day cycle in your schedule. You have health twice a cycle (2 days out of 6 days in the six day cycle). How many classes of health?

*December 19, 2015*

**3rd grader**

How did you study multiplication fact?

*December 17, 2015*

**math**

what is the product of the number 27

*December 15, 2015*

**Chemistry**

Usually, copper should be reduced by the zinc, why does being in an alloy change this?

*December 9, 2015*

**Chemistry**

Alloys of copper and zinc are used to produce brass. Why do these elements not react in this application?

*December 9, 2015*

**Precalculus**

2cos^2(theta) + Sin(theta)=1 I know I have to use the quadratic formula but i'm having trouble after I convert the Cos^2(theta) to (1-Sin^2(theta))

*December 2, 2015*

**Precalculus**

I have a precalculus test tomorrow and I've been studying nonstop for the past few days but I've been struggling because it has been 8 years since the last math class I have taken. My question is about half-angle formulas, My professor taught us that they are: Sin(...

*December 2, 2015*

**Chemistry**

Benadryl is an over-the-counter drug used to treat allergy symptoms. The formula of benadryl is C17H21NO. How many moles of C are present in 0.759 mole of benadryl?

*November 27, 2015*

**Chemistry**

An aqueous solution of KF is add dropwise to an aqueous micture containing 0.25M Ca2+ and 0.75M Mg2+ calcuate the minimum molarity of F that is nessaryvto initate the precipitation of each salt? Which precipitate first? Ksp of CaF2 :5.4x10^-9 Ksp of MgF2 :3.6x10^-8

*November 21, 2015*

**school math 3rd grader**

how you find the solution to your subtraction problem without doing any calculation, Damon? explain

*November 18, 2015*

**school math 3rd grader**

how you write a subtraction word problem related to this addition word problem Ms Sue?

*November 18, 2015*

**school math 3rd grader**

how u find solution for addition problem Ms Sue ?

*November 18, 2015*

**school math 3rd grader**

Meg spent $3.75 on candy and $4.89 on toys. How much did she spend in all? Find the solution to your subtraction problem without doing any calculation. Explain.

*November 18, 2015*

**school math 3rd grader**

how to find solution to subtraction problem without doing any calculation. explain?

*November 18, 2015*

**Algebra 2**

Simplify the following exponents. (3x^ay^bz^c)(-y^fz^g)

*November 12, 2015*

**Algebra 2**

Simplify the following exponents. (3m^2n^7/m)^5

*November 12, 2015*

**Algebra 2**

A share of ABC stock was worth $60 in 2005 and only worth $45 in 2010. Find the multiplier and the percent decrease.

*November 12, 2015*

**algebra1**

6 + x/-8 = 4/7 what does x =

*October 3, 2015*

**AP Calculus**

a norman window is constructed by adjoining a semicircle to the top of an ordinary rectangular window. find the dimensions of a norman window of maximum area if the total perimeter is 72 units. Base value is 21.

*October 1, 2015*

**Fire protection eng**

20,500 gallons of kerosene spill into a banked up area that measure 20 foot x 10 foot how long will the fire last it is left unattended ? 1 gallon = 3.785 liter 1000 liters = 1 m^3 1in = 2.54 cm 1ft = 12 in

*September 29, 2015*

**science**

so using an instrument to extend the power of an observation isnt itself an observation?

*September 25, 2015*

**science**

i put 2 on my test can u explain why its 2.

*September 25, 2015*

**science **

a student is observing a rock. which of the follwoinf is an observation 1. the rock is 55g in mass 2. the rock is over billions of years old

*September 25, 2015*

**Object oriented programming**

The Romance World Cruise Line provides special gifts for passengers who are newlyweds, as well as for those who have been married more than 40 years. Design a pseudocode for a program that accepts a couple's last name, ship cabin number, and number of years married. ...

*September 24, 2015*

**Programming**

What's the rest of the the pseudocode

*September 22, 2015*

**Programming**

What's the rest of the the pseudocode

*September 22, 2015*

**College Physics**

At a firing range, a target is placed 300 m from where someone is firing a rifle. The muzzle speed of this rifle is 700 m/s. If the rifle is aimed directly at the center of the target, by how far will the target miss? At what angle would the rifle need to be aimed at to hit ...

*September 14, 2015*

**Precal**

The velocity v of a fluid flowing in a conduit is inversely proportional to the cross- sectional area of the conduit.( Assume that the volume of the flow per unit of time is held constant .) Determine the change in the velocity of water flowing from a hose when a person places...

*September 10, 2015*

**Math**

The height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. When graphed, the function gives a line with a slope of −0.6 Suppose that the height of the candle after 19 hours is 9.6 centimeters. What was the height ...

*September 8, 2015*

**Math**

Are you going to wait the four hours until the quiz expires or do you have a plan B?

*September 7, 2015*

**JOb interview**

here are a few people in line waiting to be served. You are taking care of one customer and she insists you gave her the incorrect change. You know you didn't. What do you do?

*August 17, 2015*

**JOb interview**

here are a few people in line waiting to be served. You are taking care of one customer and she insists you gave her the incorrect change. You know you didn't. What do you do?

*August 17, 2015*

**JOb interview**

here are a few people in line waiting to be served. You are taking care of one customer and she insists you gave her the incorrect change. You know you didn't. What do you do?

*August 16, 2015*

**JOb interview**

Briefly explain why you feel you are the ideal candidate for this position.This field is mandatory

*August 16, 2015*

**JOb interview**

Please provide an example of your best customer service situation. Explain why the service you provided was so successful

*August 16, 2015*

**JOb interview**

here are a few people in line waiting to be served. You are taking care of one customer and she insists you gave her the incorrect change. You know you didn't. What do you do?

*August 16, 2015*

**alg1**

solve for 8m^2 +20m=12 for m by factoring

*August 5, 2015*

**Math velocity **

A ball is thrown straight up from the edge of the roof of a 60.0 m tall building. If a second ball is dropped from the roof 2.0 s later what must the initial velocity of the first ball be if both are to reach the ground at the same time?

*June 22, 2015*

**MATH URGENT**

find the average rate of change between f(-4) and f(-1) in the function f(x)= x^2+2x-8

*June 1, 2015*

**Calculus**

For f(x)=(1-x)/(1+x) and g(x)=x/(1-x) , find the simplified form for f [g(x)] and state the domain

*May 27, 2015*

**Calculus**

Use the table below to evaluate d/dx [f[g(2x)]] at x = 1 x 1 2 3 4 f(x) 6 1 8 2 f '(x) 6 1 8 2 g(x) 1 4 4 3 g '(x) 9 5 5 -4

*May 27, 2015*

**Calculus**

Which of the following functions is continuous at x = 5? I put a for my answer, could someone please check this? a. f(x)=(x^2-25)/(x+5) b. (x^2-25)/(x-5), x cannot equal 5 20 when x equals 5 c.(x^2-25)/(x-5), x cannot equal 5 0 when x equals 5 d. all of the functions are ...

*May 21, 2015*

**Calculus**

So would that mean that it is only the first one?

*May 20, 2015*

**Calculus**

Which of the following statements is/are true? I.If f '(c) = 0, then f has a local maximum or minimum at x = c. II.If f is continuous on [a, b] and differentiable on (a, b) and f '(x) = 0 on (a, b), then f is constant on [a, b]. III.The Mean Value Theorem can be ...

*May 20, 2015*

**Calculus**

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

*May 20, 2015*

**Calculus**

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

*May 20, 2015*

**Math**

Maya made a sign with area of 48 square centimeters. Use a centimeter grid paper to draw a shape that shows what her sign could look like?

*May 20, 2015*

**Science**

Check my answers pls

*May 19, 2015*

**Science**

1.A weatherman reports, “The storm waves are about 2 meters high and about 35 meters apart.” What properties of waves is the reporter describing? (1 point) A.frequency and wavelength B.wavelength and wave speed C.amplitude and wavelength D.amplitude and frequency 2. ...

*May 19, 2015*

**Statistics**

Scores on the Scholastic Aptitude Test form a ND with a mean of 500 and SD of 100 what is the minimum score necessary to be in the top 15% of the SAT distribution? Stuck on what to do on this question? Any answers?

*May 19, 2015*

**Calculus**

Find the x-coordinates of any relative extrema and inflection point(s) for the function f(x) = 3x^(1/3) + 6x^(4/3). You must justify your answer using an analysis of f '(x) and f "(x). I found the first and second derivative which i think is (8x+1)/(x^(2/3), and the ...

*May 18, 2015*

**Calculus**

The position function of a particle in rectilinear motion is given by s(t) s(t) = t^3 - 9t^2 + 24t + 1 for t ≥ 0. Find the position and acceleration of the particle at the instant the when the particle reverses direction. Include units in your answer.

*May 18, 2015*

**Calculus**

The table below shows the temperature (in °F) t hours after midnight in Phoenix on March 15. The table shows values of this function recorded every two hours. (10 points) a. Estimate the value of T'(6). Give units in your answer. b. What is the meaning of T'(6)? t ...

*May 15, 2015*

**Caclulus**

Find f'(x) for f(x) = ln(x^3 + e^(4x)). I got(4e^(4x)+3x^2)/(e^(4x)+x^3) Is that right?

*May 15, 2015*

**Caclulus**

Sorry it is sin^3(3x^2)

*May 15, 2015*

**Caclulus**

Find f'(x) for f(x) = sin3(3x2).

*May 15, 2015*

**science**

Is glycerol a fat, carbohydrate or protein?

*May 10, 2015*

**Math**

Given Perimeter of triangle is 26 inches. Side A is 3 inches longer than B. Side C is 1 inch shorter than twice side B

*May 10, 2015*

**algebra 1**

so im right?

*May 2, 2015*

**algebra 1**

Find the roots of y=x^2, axis of symmetry and vertex. I got roots: (0,0) axis of symmetry: minimum point x=0 vertex: (0,0)

*May 2, 2015*

**math**

Ryans limo drove 24 miles east and then drove 50 miles south How far is the limo from where he started round to nearest tenth

*April 29, 2015*

**Math**

A monopoly has a total cost function C = 1000 + 108x + 12x^2 for its product, which has demand function p = 324 − 3x − 2x^2. Find the consumer's surplus at the point where the monopoly has maximum profit. (Round your answer to the nearest cent.)

*April 22, 2015*

**english**

It was risky for Superman to announce that he could leap over a building in a single bound because he’d been really ashamed if he missed and went splat into the side of the building.

*April 17, 2015*

**Social studies**

9 is A

*April 16, 2015*

**physics**

A 4.0kg particle collides with a 6.0 kg particle that is at rest at 10m/s. What is the velocity of the particles after the collision

*April 13, 2015*

**Math (Please help ASAP)**

How do I solve this equation (q+p^2-33p=9) for the point of elasticity in terms of p? Thank you!

*April 8, 2015*

**physics **

a skier decides to ski down a hill inclined at 12 degrees to the horizontal. He pushes on his poles and starts to slide down the slope. If his initial speed after he stops pushing is 4.7 m/s and us= 0.28, how far will mr.grewal slide down the hill before coming to rest

*April 6, 2015*

**Physics**

If a ball is launched into the air vertically with a velocity of 20 m/sec, how fast will it be moving after two seconds? (The gravity's acceleration is rounded to 10 m/sec/sec.)

*March 26, 2015*

**Calculus **

Find the elasticity of the demand function: pq = 42 p=$2 My professor went through this lesson really fast and I would appreciate anyone's help in explaining it. Thank You

*March 25, 2015*

**Elasticity Demand Calculus **

Find the elasticity of the demand function: pq = 42 p=$2 My professor went through this lesson really fast and I would appreciate anyone's help in explaining it. Thank You

*March 25, 2015*

**Implicit Differentiation (Please HELP)**

Write the equation of the line tangent to the curve x^2 − 4y^2 + 192 = 0 at (8, 8) Thank You

*March 24, 2015*

**math**

Beans meal is 16% protein flour meal is 8% protein. How many pounds of each should be mixed together to get 32 pounds mixture that is 13% protein how many pounds of the flour meal should be in the mixture

*March 20, 2015*

**Math**

If the total cost function for producing x lamps is C(x) = 90 + 36x + 0.1x^2 dollars, producing how many units will result in a minimum average cost per unit? PLEASE EXPLAIN YOUR WORK Thank you

*March 9, 2015*

**Calculus Chain rule**

y = (6x^2-6)^4/x I would appreciate it more if work was shown. Thank you (I have the answer but want to know how to do it)

*February 25, 2015*

**physics**

what is the amount of force needed to move an object that has a mass of 2.0kg at an acceleration of 3.0m/s^2 with the force acting on the object at a 30 degree angle

*February 25, 2015*

**chemistry**

thanks for taking a look! :)

*February 24, 2015*

**chemistry**

How do I calculate the average Z molar mass, 1/n (Summation) of n*M given this data: (alternate equation: MZ=Summation N*M^3/Summation N*M^2) (Ave molar mass, mass of sample): (7.5,9.6) , (12.5,8.7), (17.5, 8.9), (22.5, 5.6), (27.5, 3.1), (32.5,1.7) mili moles for repective ...

*February 24, 2015*

**chemistry help!!**

How do I calculate the average Z molar mass, 1/n (Summation) of n*M given this data: (Ave molar mass, mass of sample): (7.5,9.6) , (12.5,8.7), (17.5, 8.9), (22.5, 5.6), (27.5, 3.1), (32.5,1.7) mili moles for repective numbers: 1.3,.7,.51,.25,.11,.052 TOTAL: 2.92 I don't ...

*February 24, 2015*

**physics/chemistry**

mistake, multiplying by 2 in the math is for a bubble and not a cavity >_>

*February 22, 2015*

**physics/chemistry**

how does one calculate the work done by a spherical bubble with radius r in a liquid with a surface tension of T. I understand for a cavity it is 8pi(r)T, would you just double it to get 16pi(r)T because there are 2 films? here's the math....2(4pi((r)+dr)^2 -4pir^2) for a ...

*February 22, 2015*

**Math Ms Sue**

a book with an area of 88 square inches. what would the length and width of the book.

*February 18, 2015*

**Calculus Chain rule**

How did you get an exponent of 6??

*February 17, 2015*

**Calculus Chain rule**

How can derive this function?f(x) = 2/(9x^5+1)^5 The answer is The answer is -450x^4/(9x^5+1)^6 Can you please show why? Thank you

*February 17, 2015*

** Math**

Three eighths of the cast in a musical have to sing. What fraction of the cast does not have to sing?

*February 12, 2015*

**chemistry**

given relative permitivity of water, how much energy (kj/mol) is required to break the hydrogen bond in water? (Er=80.0)

*February 8, 2015*

**Vectors/Scalars?**

the dot product of 2 vectors is always a scalar. the difference between the two is that the scalar doesn't have direction, yes.

*February 8, 2015*

**chemistry**

how do I calculate the area occupied by one single molecule, given # of molecules per meter^2 (9.6e15), the Molarity? (.1 m/dm^3) and surface excess? (1.6e-8)

*February 8, 2015*

**phys chem**

how much energy (kj/mol) is required to break the hydrogen bond in water (Er=80.0) (Er= Relative permitivity) I'm really not sure how to approach this, and if i need enthalpies of vaporization or not...

*February 8, 2015*

**algebra**

A simple random sample is drawn from a normally distributed population. The value of which of the following will not be known for certain but can be inferred?

*February 5, 2015*

**math**

Nvm i got it right. it was 1.73

*February 2, 2015*

**math**

what numbers when you multiply together give you a product of -3 and a sum of 0? if you don't know, just tell me

*February 2, 2015*

**English close reading paper**

Is it appropriate to use the "we" form and "I" in the same paper?

*January 29, 2015*

**math**

In a box there are 20 balls.7 of the balls are white. The first ball drawn from the box is white. What is the probability that the second ball will be white

*January 8, 2015*

**Language Arts**

i think its b

*January 8, 2015*

**pacific rim**

Mrs Garcia had 2/3 of a pumpkin pie left.Her sons at 3/8 of what was left. What fraction of the whole pie did her sons eat? 2/3*3/8=6/24

*January 7, 2015*