Posts by Ke$ha
Total # Posts: 82

Calculus
(1,1), (0,0) and (1,1). The four midpoints are 3/4, 1/4, +1/4, and +3/4. Each vertical strip has a width of 1/2. The lengths of the 4 strips are: 27/64(3/4); 1/64(1/4); 1/4  1/64; and 3/427/64; simplifying these, you get 21/64, 15/64, 15/64, and 21/64. So the area ... 
Calculus
For the first one i think the integral is from 1 to 1 for the two functions, because they intersect at (1,1) (0,0) and (1,1) 
Calculus
Use the midpoint rule with n=4 to approximate the region bounded by y=x^3 and y=x Show that the function f(x)= (integral from 2x to 5x) (1)/(t) dt is constant on the interval (0,+infinity) 
One more question Calculus
Thank you! 
One more question Calculus
write n with limit from 0 to infinity with the summation n on top and k=1 on the bottom (5+k(2/n))^10 (2/n) as a definite integral. 
Please help Calculus
Thank you! 
Please help Calculus
Write the integral in one variable to find the volume of the solid obtained by rotating the first?quadrant region bounded by y = 0.5x2 and y = x about the line x = 5. 
Calculus Please Help
Thank you! 
Calculus Please Help
find the area bounded by the curves y^2=2x+6 and x=y+1 
Calculus Please Check my answer
yes! thank you! 
Calculus Please Check my answer
find d/dx (integral from 2 to x^4) tan(x^2) dx tan(x^4)^2*4x^3 MY ANSWER 
One more question Calculus
So the total would be 1353.333 feet? 
One more question Calculus
A car travels along a straight road for 30 seconds starting at time t = 0. Its acceleration in ft/sec2 is given by the linear graph below for the time interval [0, 30]. At t = 0, the velocity of the car is 0 and its position is 10. What is the total distance the car travels in... 
Calculus Please Check my answer
so we would get 9.05584? 
Calculus Please Check my answer
I am confused on how to do this. Will you please help? 
Calculus Please Check my answer
Ok, so exactly how would I find the amount of water? I am confused now. 
Calculus Please Check my answer
Water is poured into a bucket according to the rate F(t)=(t+7)/(2+t), and at the same time empties out through a hole in the bottom at the rate E(t)=(ln(t+4))/(t+2), with both F(t) and E(t) measured in pints per minute. How much water, to the nearest pint is in the bucket at ... 
Calculus really quick check
Thank you!! 
Calculus really quick check
The graph of f ?(x) is continuous and decreasing with an xintercept at x = 2. Which of the following statements must be true? Edit The graph of f has an inflection point at x = 2. The graph of f has a relative maximum at x = 2. The graph of f is always concave down. MY ANSWER... 
Calculus Please Check my answer
the velocity of a particle moving along the x axis is v(t)=t^2+2t+1, with t measured in minutes and v(t) measured in feet per minute to the nearest foot find the total distance traveled by the particle from t=0 to t=2 minutes so, I took the integral of the equation so from 0 ... 
Calculus Please Check my answers
Well that was my issue with the second one is I originally got that answer but it isn't an option. 
Calculus Please Check my answers
Use the graph of f(t) = 2t +2 on the interval [?1, 4] to write the function F(x), where f(x)= integral from 1 to x f(t) dt f(x)=x^2+3x f(x)=x^2+2x12 My Answer f(x)x^2+2x3 f(x)=x^2+4x8 Find the range of the function f(x)=integral from 0 to x (sqrt 4t^2) dt (0, 4pi) (0, 2pi... 
Calculus Please Check my answers
Thank you! 
Calculus Please Check my answers
f is a function that is differentiable for all reals. The value of f ?(x) is given for several values of x in the table below. The table: x 8,3,0,3,8 f'(x)4,2,0,4,5 If f ?(x) is always increasing, which statement about f(x) must be true? f(x) passes through the origin ... 
Calculus Please Check my answers
Thank you! 
Calculus Please Check my answers
Which of the following functions grows the fastest as x grows without bound? f(x)=x^2 g(x)=x^2+5x <<<<MY ANSWER h(x)=(sqrt x^4+2x) They all grow at the same rate Compare the growth rate of the functions f(x)=4^x and g(x)=(sqrt 16^x+2^x) f(x) grows faster than g(x) ... 
Calculus Please Check my answer
The rate at which water flows into a tank, in gallons per hour, is given by a differentiable function R of time t. The table below gives the rate as measured at various times in an 8hour time period. t02378 (hours) R(t)1.952.52.84.00... 
Calculus
f is a continuous function with a domain [?3, 9] such that f of x equals 3 for x between negative 3 and 0 including negative 3, equals negative 1 times x plus 3 for x between 0 and 6 inclusive, and equals negative 3 for x greater than 6 and less than or equal to 9 and let g of... 
Calculus I'm really confused
Thank you! 
Calculus I'm really confused
solve the differential equation dy/dx=y^2/x^3 for y=f(x) with condition y(1)=1. 
Calculus
Determine if the Mean Value Theorem for Integrals applies to the function f(x) = x^3  9x on the interval [1, 1]. If so, find the xcoordinates of the point(s) guaranteed to exist by the theorem. I think one point is zero. 
Calculus
Oh thank you!!! 
Calculus
for the second integral i got (sqrt 3)/60 how did you get (sqrt 3)/120? 
Calculus
The base of a solid in the xyplane is the firstquadrant region bounded y = x and y = x^2. Cross sections of the solid perpendicular to the xaxis are equilateral triangles. What is the volume, in cubic units, of the solid? So I got 1/30 because (integral from 0 to 1) (xx^2... 
Calculus
I know it is pi (integral from zero to 1)then I get confused 
Calculus
Which of the following integrals will find the volume of the solid that is formed when the region bounded by the graphs of y = ex, x = 1, and y = 1 is revolved around the line y = 2 
Calculus
For an object whose velocity in ft/sec is given by v(t) = ?2t^2 + 4, what is its distance travelled, in feet, on the interval t = 0 to t = 2 secs? I think the answer is 2.667 but I am not one hundred percent sure. 
Calculus
So the answer would be 1.0947? 
Calculus
find the area of the region bounded by the graphs of y=x^2 and y=cos(x) 
Calculus
Thank you!!!! 
Calculus
find the volume of the solid formed by revolving the region bounded by the graphs of y=x^3 y=1 x=2 about the yaxis 
Math Calc
So my updated answer would be that the possible error is the volume of the cylinder is 63.87 in^3? 
Math Calc
r = 4 in. h = 12 in. V = pi*r^2 * h = 3.14*4^2 * 12 = 602.88 m^3. r = 4.2 in. h = 12.2 in. V = 3.14*4.2^2 * 12.2 = 675.75 in^3 675.75602.88 =72.87 in^3? is that right? 
Math Calc
The radius of a 12 inch right circular cylinder is measured to be 4 inches, but with a possible error of ±0.2 inch. What is the resulting possible error in the volume of the cylinder? Include units in your answer. 
Calculus
oh ok thank you!!!! sorry 
Calculus
wait its 3 right? 
Calculus
Yes I read it I still don't get it and 0 isn't an answer choice. 
Calculus
so the answer is none? 
Calculus
what is the difference between the two? 
Calculus
ok THANK YOU!!!!!!! 
Calculus
Thank you!!! :) 
Calculus
Let h = height of water Let r = radius of surface of water By similar triangles, r/h = 6/12 = 0.5, so r = 0.5h The volume of the water is: v = (1/3) * pi * r^2 * h v = (1/3) * pi * (0.5h)^2 * h v = (1/12) * pi * h^3 dv/dh = 0.25*pi*h^2 The question tells us that dv/dt = 3 By ... 
Calculus
Water is drained out of tank, shaped as an inverted right circular cone that has a radius of 6cm and a height of 12cm, at the rate of 3 cm3/min. At what rate is the depth of the water changing at the instant when the water in the tank is 9 cm deep? Give an exact answer showing... 
Math Calc
Find the xcoordinates 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 got 1/8 for a minimum point and 1/4 for inflection is this right? Do I need a y value? 
Math Calc
Which of the following statements is/are true 1. If f'(c)=0 then f has a local maximum of minimum at x=c 2. 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] 3.The Mean Value theorem can be applied to f(x)=1/x^2 on... 
Math Calc
*cant 
Math Calc
Given f'(x)=(x4)(62x) find the xcoordinate for the relative minimum of the graph f(x). OPTIONS: 8 6 3 None of these I think it is 3, but I am also conflicted to say none of these because I graphed the function and ant see a minimum. 
Math Calc
given the relationship 2x^2 + y^3 =10, with y > 0 and dy/dt = 3 units/min., find the value of dx/dt at the instant x = 1 unit. SUPER CONFUSED DONT GET THE EQUATION!!!!!!! 
Math
A particle is moving along the xaxis so that its position at t>=0 is given by s(t)=(t)ln(5t). Find the acceleration of the particle when the velocity is first zero. 
Math
I got 1 
Math
A particle moves along the xaxis so that at any time t, measured in seconds, its position is given by s(t) = 4sin(t)  cos(2t), measured in feet. What is the acceleration of the particle at time t = 0 seconds? 
Math
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. Estimate the value of T?(10). Give units in your answer. What is the meaning of T?(10)? t 0 2 4 6 8 10 12 14 T 73 ... 
Math
Thank you!!!!!!! 
Math
Help!!! determine the slope of the graph x^2=ln(xy) at point (1,e) 
Math
thank you!!! 
Math
f(x)=3,1,6 f'(x)=2,5,7 Just in case u cant read the chart 
Math
HELP DERIVATIVES!!!!!!!!!!!!! if h(x)=f[f(x)] use the tables for f and f' to find the value of h'(1) X f(x) f'(x) 1 3 2 2 1 5 3 6 7 
Math
THANK YOU!!!!!!!!!!! 
Math
I have no clue how to do this problem: lim>2 then thees this little dash slightly above the 2 and then its x2/(x2) 
Math
FIND THE LIMIT!!! lim x>3 sqrt(2x+3) sqrt (3x)/(x^23x) I keep getting zero is this right? 
Algebra 2
is this right??? 
Algebra 2
Describe an infinite geometric series with a beginning value of 2 that converges to 10. What are the first four terms of the sequence? a{1} = first term of series ∞... 
Algebra 2
105+15n 285 month 27 these are my other answers 
Algebra 2
The deposits Ginny makes at her bank each month form an arithmetic sequence. The deposit for month 3 is $150, and the deposit for month 5 is $180. Answer these questions 1.what is common differences for each month? $15 2.write explicit formula for arithmetic sequence 3.amount ... 
Algebra 2
Thank you! 
Algebra 2
Will someone please check if I am right???? find the second and third term of the arithmetic sequence 7, __,__,22,27... Options: 12,15*** My Answer 17,12 10,17 12,17 
English 9  HELP!
What were the answers?????? 
quick english help
Thanks!:) 
quick english help
wait, wouldn't it be c because the verb needed ends in ed? 
quick english help
in which sentence is the underlined infinitive or infinitive phrase function as a direct object? c. After all that exercise, the runners needed *to drink water*. d.Just as the mayor was about *to give an award*, it began raining. I would say its d? 
Math PLEASE HELP PLEASE PLEASE PLEASE
You posted an entire test on here and expect people to do it for you?! Do your own tests!!!!!!!!!!! 
chemhelp
hot pants