Friday

October 31, 2014

October 31, 2014

Total # Posts: 1,759

**Calculus**

An object moves in a straight line. Its velocity, in m/s, at time t is v(t)=4t^2/(4+t^3), t>(greater or equal)0. Determine the maximum and minimum velocities over time interval 1<t<4 I got minimum as 1= 4/5. However for maximum at t=4, I got 16/17 but the book says 4/3?
*February 22, 2012*

**Calculus**

An object moves in a straight line. Its velocity, in m/s, at time t is v(t)=4t^2/(4+t^3), t>(greater or equal)0. Determine the maximum and minimum velocities over time interval 1<t<4 I got minimum as 1= 4/5. However for maximum at t=4, I got 16/17 but the book says 4/3?
*February 22, 2012*

**Calculus**

For which point(s) on the graph of f(x)=5x/(x+2) is the slope of the tangent 2/5? a) (-3,15) b) (7, 35/9) c) (3,3) and (-7,7) d) (24, 60/13) Answer is C?
*February 21, 2012*

**Calculus**

Thanks!
*February 21, 2012*

**Calculus**

Verify if correct or not please =) What is the slope of the normal to y= (x^2-1)/(x+5) at (1,0) a) -3 b) -1/2 c) -1/3 d) 1/3 Answer is A, -3. ---------------------------------------- What is the y-intercept of the line that is tangent to f(x)=4/(3x+1) at (-1, -2)? a)-5 b) -3/4...
*February 21, 2012*

**Math**

if h(t) = 17.4 * 1.23^1, find h(13)
*February 20, 2012*

**math - probability**

1. 7 over 8
*February 20, 2012*

**Ground School: Regulations**

I am working on my private pilot license and these regulation things, HOW do you learn all of them?????????
*February 20, 2012*

**Piloting: stumped**

We are taking the class together and have questions about it. we aren't the same person!!
*February 20, 2012*

**math**

If you flip 2 coins then 25% chance
*February 20, 2012*

**math**

4 out of 5 that the number will be less than 900
*February 20, 2012*

**Math**

if f is an exponential function, and f(5)=20 and f(9) = 14, use the add-multiply property to calculate f(13),f(17), and f(21). Show your method
*February 19, 2012*

**chemistryyyy**

A solution is made by dissolving 0.0100 mol of HF in enough water to make 1.00 L of solution. At 23 °C, the osmotic pressure of the solution is 0.308 atm. What is the percent ionization of this acid? Please help.
*February 19, 2012*

**Calculus-derivatives**

Verify these answers~ 1. For what value(s) of x does f(x)=(x^2-16)^5 have a horizontal tangent? a) x=-4,4 b) x=-4,0,4 c) x=0 d) x=0,4 Answer is B, x=-4,0,4 --------------------------------------- 2. What is the derivative of f(x)=(3x^2+7)^3? a) f'(x)=3(3x^2+7)^2 b) f'(...
*February 18, 2012*

**Calculus-derivatives**

What is the slope of the tangent of each curve at given point y=√(16x^3), (4,32) If I find the derivative of y=√(16x^3) Will it be 16/-x^3
*February 15, 2012*

**Calculus-derivatives**

So for number 1 the answer is t=1 -2+2t=0 2t=2 2/2=1
*February 15, 2012*

**Calculus-derivatives**

Oh crap nvm!
*February 15, 2012*

**Calculus-derivatives**

For number one we find the derivative of 3-2t+t^2 wouldn't that be t-2?
*February 15, 2012*

**Calculus-derivatives**

Explain how to do these questions~ 1. An object moves in a straight line with its position at time t seconds given by s(t) = 3-2t+t^2, where s is the measured in metres. At what time is the object not moving? 2. Determine the coordinates of the point(s) on the graph of y=3x- 1...
*February 15, 2012*

**Math**

a ship leaves sydney heads and travels 45 km due east. it then returns and travels 86 km due north. how far is it from its starting point? please guys step by step.. thank you in advance.
*February 15, 2012*

**Calculus**

Explain how you got the answer please.
*February 14, 2012*

**Calculus**

What is the derivative of 6/x?
*February 14, 2012*

**Calculus**

For each function, find the derivtive f'(a) for given value of a f(x) = sqrt(x+1), a=0
*February 14, 2012*

**Calculus**

Thank you~
*February 13, 2012*

**Calculus**

May I know where you got 5a + 5h - 2
*February 13, 2012*

**Calculus**

Find each function, find f(a+h) and f(a+h)-f(a) a) f(x)=5x-2
*February 13, 2012*

**Calculus**

Why is it important to determine continuity of the function?
*February 13, 2012*

**Math**

State the equation of the line passing through the points (7,-1) and (2,2) a) 5x+3y-16=0 b) -5x-3x-16=0 c) -3x - 5y - 16=0 d) 3x + 5y-16=0 ------------------------------------ Is letter D correct?
*February 12, 2012*

**Chemistry**

How do you find the ratio of moles of oxygen to moles of tin? What would be the Empirical formula of tin oxide from the result of ratio? From my calculations I got the moles as: Moles of oxygen = 1.761 x 10^-2 Moles of Tin = 8.944 x 10^-3 Thanks!
*February 11, 2012*

**Calculus**

Examine the continuity of the function h(x)=[-x, if x<0 .......0, if x=0 .......x, if x>0 I don't understand this question...
*February 10, 2012*

**Calculus**

Thank you~~
*February 8, 2012*

**Calculus**

Determine the equation of the line described by the given information. a) slope -2/3, passing through (0,6) b) passing through points (2,7) and (6,11) c) parallel to y=4x-6 passing through point (2,6)
*February 8, 2012*

**Calculus**

Determine an expression, in simplified form, for the slope of the secant PQ. Given: P(1,3) , Q(1+h, f(1+h)) , where f(x) = 3x^2 PQ=Y2-Y1/X2-X1 I keep getting wrong answer, arghhh.
*February 8, 2012*

**Calculus**

How to rationalize this question? (√3 - √2)/(√3+√2) Do I multiply those two by(√3 - √2) or (√3 + √2)
*February 7, 2012*

**algebra**

How do you write someone is older than 27 by less than 38 as an inequality?
*February 4, 2012*

**Physics**

An elevator (mass 4175 kg) is to be designed so that the maximum acceleration is 0.0700g. What is the maximum force the motor should exert on the supporting cable?
*February 1, 2012*

**Precalculus**

How can i write this in log form 5^-2 = 0.04
*February 1, 2012*

**Precalculus**

Quad III and IV? May I know how you got 3.86132? and value for quad IV?
*January 31, 2012*

**Precalculus**

Solve for x, 0<x<2pi 3sin^2x - sinx -2=0 Its not factorable, do I use quadratic formula?
*January 31, 2012*

**Precalculus**

The answer says:16.0 or 74.0 degrees :|
*January 31, 2012*

**Precalculus**

When a projectile leaves a starting point at an angle of elevation of theta with a velocity v, the horizontal distance it travels is determined by: d=v^2/(32) sin2theta Where d is measured in feet and v in feet per second. An outfielder throws the ball at a speed of 75 miles ...
*January 31, 2012*

**Precalculus**

Write 4log2+log6-log3 as a single logarithm. Explain with steps please!~~
*January 30, 2012*

**Precalculus**

If the base was 2 then it would be cuberoot 2^6?
*January 29, 2012*

**Precalculus**

Evaluate log(Base4) ^3sqrt64 (The ^3 is an exponent infront of sqrt 64) I keep getting wrong answer :|
*January 29, 2012*

**Precalculus**

Solve for x: 6^(x+3) - 6^x = 215. I got answer as 1, is it correct?
*January 29, 2012*

**Precalculus**

Thankk you! Took me long to figure it out!
*January 28, 2012*

**Precalculus**

Solve 5^(2-x) = 1/125 for x.
*January 28, 2012*

**Math**

How do I solve this if there is no equation to this 1. The population of the bacteria in a Petri dish increases by a factor of 10 every 10 hour. If there are initally 20 bacteria in the dish, how long will it take before the population increases to 60,000 to the nearest tenth ...
*January 28, 2012*

**history**

What is the term for the power to make final decisions?
*January 28, 2012*

**government**

What is the term for the power to make final decisions?
*January 28, 2012*

**Math**

Determine the exact value of cos 465 degrees a) √3 + √2/2 b) √2 + √3√2/4 c)√2 - √3√2/4 d)2+√2-√3√2/4
*January 27, 2012*

**Math**

Explain how to do this with steps please. 1. Simplify cos(x-y)+cos(x+y)/cosx I did some of these so far, don't know if it is correct. Formula: cosxcosy= cos(x+y)+cos(x-y)/2 cos(x-y)+cos(x+y)/cosx =cosxcosy/2cosx
*January 26, 2012*

**Math**

Explain how to do this with steps please. 1. Simplify cos(x-y)+cos(x+y)/cosx Formula: cosxcosy= cos(x+y)+cos(x-y)/2 cos(x-y)+cos(x+y)/cosx =cosxcosy/2cosx
*January 26, 2012*

**Math**

Justine measures the milk in two different cartons. One carton contains 1 liter and 665 milliliters of whole milk, and the other carton contains 1 liter and 183 milliliters of chocolate milk. How much more whole milk is there than chocolate milk?
*January 26, 2012*

**Math**

How come I am not suppose to get rid of the the denominator?
*January 25, 2012*

**Math**

How many solutions does the equation cosx + 1/2 = 1 have for 0<x<2pi cosx+1/2=1 cosx+1=2 cosx=2-1 cosx=1 therefore 1 solution? A) 1 b) 2 c) 3 d) 4
*January 25, 2012*

**Math**

Solve (sinx-1)(cosx -1/2) = 0 where 0≤x<2pi a) pi/3, pi/2, 5pi/3 b) pi/6, 5pi/6, pi c) pi/3, pi, 5pi/3 d) pi/6, pi/2, 5pi/6
*January 25, 2012*

**Math**

Thank you~ T.T my school is fast paced, I am trying to keep up...
*January 25, 2012*

**Math**

How did you get 1 + cot^2 x?
*January 25, 2012*

**Math**

What is the first step. Explain please. Which expression is equivalent to cos^2x + cot^2x + sin2^x? a) 2csc^2x b) tan^2x c) cot^2x d) csc^2x cos^2x + cot^2x + sin2^x
*January 25, 2012*

**inventions**

Need to come up with an invention
*January 25, 2012*

**Precalculus**

Which value for x is a solution to cosx = sqrt of 2/2? a) -9pi/4 b) 3pi/4 c) -3pi/4 d) 4pi/3 What is the first step I should do?
*January 24, 2012*

**Math**

Options are a) 0 b) 1 c) -1 d) undefined
*January 24, 2012*

**Math**

Could someone explain the steps for this question. Simplify the expression tan(5pi/8)-tan(3pi/8)/1+tan(5pi/8)tan(3pi/8)
*January 24, 2012*

**English**

I am doing an application it says: Have you held any leadership type positions? Yes/No Please describe (100 words or less) I did not have any leadership type positions, so no. My question is, do I have to explain why I did not have any leadership or is it only if I say yes?
*January 23, 2012*

**math**

During an art contest you and a classmate each won blue ribbons for 1/3 of the pieces you entered. You won 2 blue ribbons and the classmate win 3. Explain how.
*January 20, 2012*

**Math**

If the diameter of a monster truck tire is 3.5 m and it makes one rotation every 5 seconds, how far does the tire roll in 1 minute? Diameter 3.5 radius: 3.5/2 = 1.75 12(2pi x 1.75) =131.9 m the book states that its 263.89 m? What did I do wrong?
*January 19, 2012*

**Math**

I am confused for number 3
*January 19, 2012*

**Math**

I am still confused for number 2. For number 3, you used the amplitude(which is 4) to find lowest+highest?
*January 18, 2012*

**Math**

1. The height of a bumble bee above the ground is modelled by h(t) = 0.5cos(2π t) + 2, where h is in metres and t is in seconds. At what time is the bee’s instantaneous rate of change of height with respect to time greatest? a.) 1 s b.) 1.25s c.) 1.5s d.) 2s Why is ...
*January 18, 2012*

**Math**

Thank you~
*January 18, 2012*

**Math**

Why is 32/5 = 6 2/5?
*January 18, 2012*

**Math**

If an object travels in a circle 32pi/5 radians, at what degree measure is it, relative to where it started? a) 1052° b) 144° c) 72° d) 98.6° I got 1152° but there is no option for the answer, what did I wrong?
*January 18, 2012*

**Math**

How do you find the distance? Please explain the steps >< A ball in a pinball machine moves 13 of the way through a circular groove that has radius 3 m. How far does the ball travel? a. 3.14 m b. 360 m c. 6.28 m d. 0.69 m
*January 18, 2012*

**math**

i think it is b credit unnion
*January 11, 2012*

**math**

7. A _______ is a group of people who agree to save their money together and to make loans to each other at a relatively low rate of interest. [A. commercial bank] B. credit union C. Christmas club D. investment firm
*January 11, 2012*

**math**

3. The gross income of David Vaughn is $785 per week. His deductions are $42.25, FICA tax; $90.33, income tax; 2% state tax; 1% city tax; and 3% retirement fund. What is her net income for one week? A. $675.32 B. $628.77 [C. $605.32] D. $749.77
*January 10, 2012*

**english**

1. Write a composition using one of the topics listed below. Your composition should be three to five paragraphs long. It should contain an introduction, a body, and a conclusion. c. Compare and contrast driving in the winter and driving in the summer. 2. Write a letter of ...
*January 10, 2012*

**Precalculus**

For number 4, I got this answer after calculating... 4x/(x-2)=(3x-2)/(x-2) 4x(x-2)=(3x-2)(x-2) 4x^2 - 8x = 3x^2 - 6x - 2x + 4 4x^2-3x^2-8x+6x+2x-4=0 x^2 - 4 =0 (x-2)(x+2)=0 x= 2, -2 Am I doing something wrong?
*January 10, 2012*

**Precalculus**

Could someone help/verify these answers~ Thanky you! 1.What is the range of the reciprocal function of f(x)=10-x^2? a) {YER|y≥1/10} b) {YER|y≥10} c) {YER|1/10≤y<0} d) YER|y<0 or y≥1/10} Answer: D? ---------------------------------------- 2. It ...
*January 10, 2012*

**english**

please check for mistakes it is in paragraphs but the one i put up is not
*January 10, 2012*

**english**

1. Write a composition using one of the topics listed below. Your composition should be three to five paragraphs long. It should contain an introduction, a body, and a conclusion. c. Compare and contrast driving in the winter and driving in the summer. 2. Write a letter of ...
*January 10, 2012*

**Math**

So I have to use quadratic formula right? If so, no wonder I don't get the answer
*January 9, 2012*

**Math**

How do you do this question? I am not sure if this right. 1. solve rational equation A) (x+3)/(x-1)=2x+1 x+3=(2x+1)(x-1) x+3=2x^2 - 2x + x - 1 ??
*January 9, 2012*

**calculus AB**

ç is the integral sign
*January 8, 2012*

**calculus AB**

given ç 1to-1 f(x)dx=0 and ç 1to0 f(x)dx=5, compute the following a.ç 0to-1 f(x)dx b.ç 0to1 3f(x)dx=0 c.ç 1to-1 (f(x)+7)dx=0
*January 8, 2012*

**calculus ab**

The velocity of a particle tralling along the x-axis is given by v(t)=(e^-t)(sin(t)). Find the following a. Compute the net change in distance from time t=1 to time t=3 (this is equivalent to s(3)-s(1) b. compute the total distance traveeled from time t=0 to time t=6pi c. Find...
*January 8, 2012*

**ap calculus ab**

for f(x)=lnx we know that f(e)=1. Use the tangent line at(e,1) to compute the tangent line approximation of f(3). what does the difference between the actual value and the tangent line approximation have to do with the concavity (2nd derivative) of the function at (e,1)?
*January 8, 2012*

**Math Fractions**

12/12 divided by 3/8 i really need help someone plz help!!!!
*January 5, 2012*

**Math Fractions**

12/12 divided by 3/8 i really need help someone plz help!!!!
*January 5, 2012*

**Math Fractions**

12/12 divided by 3/8 i really need help someone plz help!!!!
*January 5, 2012*

**Math Fractions**

12/12 divided by 3/8 i really need help someone plz help!!!!
*January 5, 2012*

**Math Fractions**

12/12 divided by 3/8 i really need help someone plz help!!!!
*January 5, 2012*

**Shurley**

im srry if i offended you ms.sue
*January 4, 2012*

**Shurley**

no? I dont no wat u meen
*January 4, 2012*

**Shurley**

ty btw y do u answer all the questions
*January 4, 2012*

**Shurley**

I'm in Shurley Grammar does any1 no how to clasify way?
*January 4, 2012*

**english**

20. Which of the following is a run-on sentence? A. We like to take a walk after dinner. B. Mike joined the army, and he became more disciplined during the training. [C. Karen's uncle arrives tomorrow she wants to see him.] D. The house was owned by the mayor.
*January 4, 2012*

**english**

19. Which of the following sentences is correctly punctuated? A. Mary remembered to buy milk didn't she? B. The company held it's annual party at the convention center. [C. Mr. Jones visited the YMCA before becoming a member.] D. The local police asked the F.B.I. to ...
*January 4, 2012*

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