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right answers trust me1.d 2.a 3.a 4.b 5.d 6.d 7.c 8.a 9.d 10.b 11.b 12.a 13.a 14.a 15.b 16.c 17.a 18.b 19.c 20.b 21.d 22.c 23 do
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2. 31 views
How do I take the x-partial derivative of -5e^(-x^2 -y^2)(-2x^2 +2xy+1) fx=These is what I have tried: fx= [-5e^(-x^2 -y^2)(-4x
1. 4 answers
2. 611 views
Find the local maximum and minimum values and saddle point(s) of the function. If you have three-dimensional graphing software,
1. 1 answer
2. 1,876 views
The temperature at a point(x, y, z)is given by T(x, y, z) = 100e^−x^2 − 3y^2 − 9z^2 where T is measured in °C and x, y, z
1. 1 answer
2. 650 views
The length ℓ, width w, and height h of a box change with time. At a certain instant the dimensions are ℓ = 7 m and w = h = 2
1. 2 answers
2. 2,109 views
Find the indicated partial derivative. (Assume a, b, and c are greater than three.)u = x^(a)y^(b)z^(c) [∂^(6)u]/[∂x
1. 1 answer
2. 2,181 views
Find the set on which h is continuous.h(x,y)=(5-xy)/(2+x^2 y^2) +ln((5-xy)/(2+x^2 y^2))
1. 1 answer
2. 370 views
Find the tangential and normal components of the acceleration vector. (r)= 2t^2i + (2/3t^3 -2t)jThese are what I did.There are
1. 4 answers
2. 629 views
Find the tangential and normal components of the acceleration vector. (r)= (t^2 +1)I +t^3 j, t>=0?I need to know what are the
1. 2 answers
2. 485 views
A ball with mass 0.8kg is thrown southward into the air with a speed of 30m/s at an angle of 30 to the ground. A west wind
1. 2 answers
2. 1,349 views
A batter hits a baseball 3 ft above the ground toward the center field fence, which is 10 ft high and 400 ft from home plate.
1. 2 answers
2. 919 views
Does anybody know how to solve this question?a) Find the arc length function for the curve measured from the point P in the
1. 0 answers
2. 763 views
R(t)=e^t sin(t)i+ e^t cos(t) + √(2e^t)ka) Find the arc length function for the curve measured from the point in the direction
1. 0 answers
2. 625 views
Use the formula in Exercise 42 to find the curvature. x=acos(ωt), y=bsin(ωt)Exercise 42 formula: k = l(x' y'' - y' x'')l /
1. 1 answer
2. 966 views
The graph of r(t)=<t- 3sin(t)/2,1- 3cos(t)/2,t> For which values of t is the curvature largest?I don’t know why my answer is
1. 2 answers
2. 626 views
The graph r(t)=<t-3/2sin(t),t-3/2cos(t),t> . For which values of t is the curvature largest?
1. 3 answers
2. 433 views
Graph the curve r(t)=(sin(3t),sin(2t),sin(3t)) At how many points on the curve does t appear that the curvature has a local or
1. 2 answers
2. 830 views
At what point does the curve have maximum curvature?y = 5 ln(x)
1. 1 answer
2. 5,333 views
Find the length of the curve correct to four decimal places. (Use a calculator to approximate the integral).r(t) = (cos π t,
1. 4 answers
2. 2,884 views
Find the length of the curve correct to four decimal places. (Use a calculator to approximate the integral.) R(t)=(t^2,t^3,t^4)
1. 6 answers
2. 1,545 views
Evaluate the integral.[0,pi/4]∫( sec(t)tan(t)+ tcos(2t)j+ ((sin(2t))^2) *(cos(2t))k) dt
1. 1 answer
2. 963 views
Find a vector equation for the tangent line to the curve of intersection of the cylinders x^2 + y^2 = 25 and y^2 + z^2 = 20 at
1. 1 answer
2. 1,074 views
Make a large sketch of the curve described by the vector function r(t)=<t^2, t >, 0 less than equal to 2, and draw the vectors
1. 1 answer
2. 890 views
Reduce the equation to one of the standard forms y^2 =x^2 +(1/9)z^2
1. 2 answers
2. 310 views
Find three different surfaces that contains the curve r(t)=2ti+e^tj+e^2tk.
1. 1 answer
2. 1,422 views
Find the limit. lim t-->∞ [(t^2 -t)/(t-1)I +√((t+8))j + sin(πt)/ln(t)k]
1. 1 answer
2. 671 views
Reduce the equation to standard form, classify the surface x^2-y^2+z^2-4x-2z=0I need step by step to the answer ((x-2)^2)/5
1. 1 answer
2. 1,010 views
Determine whether the planes are parallel, perpendicular, or neither. them.(Round to one decimal place.) 9x-3y+6z=2, 2y=6x+4z
1. 2 answers
2. 952 views
Find an equation of the plane. The plane through the point(5,3,6) and perpendicular to the vecxtor (1,-2,5).
1. 1 answer
2. 398 views
Find symmetric equations for the line. (Use the parameter t.)The line through (−8, 4, 7) and parallel to the line x/2= y/3=
1. 4 answers
2. 2,047 views
Suppose that a doesn't equal 0.a) If a.b = a.c, does it follow that b = c? b) If axb = axc does it follow that b = c? c) If a.b
1. 2 answers
2. 600 views
A crane suspends a 500-lb steel beam horizontally by support cables (with negligible weight) attached from a hook to each end of
1. 3 answers
2. 2,901 views
Find the volume of the parallelepiped determined by the vectors a, b, and c.a =(1,5,4) b =(-1,1,5) c =(4,1,4)
1. 1 answer
2. 484 views
Find a nonzero vector orthogonal to the plane through the points P, Q, and R.? Consider the points below.P(0,-3,0), Q(4,1,-3),
1. 1 answer
2. 2,782 views
Find the vector, not with determinants, but by using properties of cross products.k × (i − 8j)
1. 1 answer
2. 1,481 views
A block-and-tackle pulley hoist is suspended in a warehouse by ropes of lengths 2 m and 3 m. The hoist weighs 340 N. The ropes,
1. 1 answer
2. 5,569 views
Find the magnitude of the resultant force and the angle it makes with the positive x-axis. (Let |a| = 30 lb and |b| = 16 lb.
1. 2 answers
2. 12,622 views

Answers (13)

uhh, There is a typo with the function. It suppose to be 5e^(-x^2 -y^2)(-2x^2 +2xy+1). Still use Bosian same method to solve and end with oobleck answer right?
It was a typo. For r''(t), I got 4i+4tj. How about the answers? Are they correct or not?
typo at these parts [1+(f’(t))^2]^(3/2)= [1+ (1-3cos(t)/2)^2+ (3sin(t)/2)^2+( 1)^2]^(3/2) =[1+1 -3cos(t)/2 -3cos(t)/2+ 9cos^2(t)/4+ 9sin^2(t)/4) + 1)]^(3/2) =[-6cos(t)/2+ 9/4cos^2(t)+sin^2(t))+ 1+1+1)]^(3/2) =[-6cos(t)/2+ 9/4 + 3)]^(3/2) =[-6cos(t)/2+
Is this problem can only be solved by calculator or also by hand and what other graphing software? All I have is a Ti84 calculator.
How do I do part b. Use a CAS to find and graph the curvature function. Does this graph confirm your conclusion from part (a)?
I don't get how you get 0,2. can you explain further ?
Thankyou
Could you show the steps of how you solve for it to get to the answer. I try without u and got over 300.
I did that and my answer is wrong.Here what I did. (0,2)∫▒〖(√16t^4+9t^2+4t^2)dt (0,2)∫▒〖(t(16t^4+9t^2+4)^(1/2)dt u=16t^4+ 9t^2+ 4 du=64t^3+18t^2+9dt du=2t(32t^2+ 9)dt dt=du/2t(32t^2+ 9) (0,2)∫▒〖(t(u)^(1/2)(du/2t(32t^2+ 9)) [(3/2t(16t^4+
Igot to the website but don't know how to enter the three equations to get a 3d graph.
parallel
I don't under even after looking at the site.
How does you get 250-lb?

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