Recent content by kdizzle711

Homework Statement This is an example in my book with omitted steps. Suppose the reaction time X of a randomnly selected individual to a certain stimulus has a standard gamma distribution with alpha=2. When X is continuous P(2<=X<=5) = F(5;2)-F(3;2) = .960-.801 = .159 Homework...

Also the nullspace is the solution set to Ax=O, so it being 1 means there is only 1 solution set

N represents the dimension of the nullspace, I am stumped Am I supposed to prove it my T(v+w) = T(v) +T(w) and T(cV)=cT(v)?

Homework Statement Let L : M 2x2 ---> R^3 be defined by L( a b ) = (a, b+c , d) c d a. Find ker(L), is L a 1-1 function? b. What is the rank of L and does it map M 2x2 onto R^3 Homework Equations The Attempt at a Solution...

Homework Statement Object A, which has been charged to + 21.2nC , is at the origin. Object B, which has been charged to + 19.7nC , is at (x,y)= (0cm, 2.80cm) . What is the y-component of the force (F a on b)y on B due to A Homework Equations F=K(q1)(q2)/(r^2) The Attempt at a...

I forgot to take into acount the dx, but when I do i get (3cosΘ/9sin²Θ)*(3cosΘ)=9cos²Θ/9sin²Θ= cot² but the integral of cot is ln(sinU) or it can be -ln(cscu) I am stuck

The right answer is here, but I'm not sure which steps i am messing up http://integrals.wolfram.com/index.jsp?expr=sqrt%289-x%5E2%29%2F%28x%5E2%29

I still think I am making a mistake somewhere I did x²=9sin²Θ so------- 3cosΘ/9sin²Θ= (1/3)cotΘcscΘ int(1/3)cotΘcscΘ =(x/3)ln(sinu)-ln(cscu+cotu) using the triangle i found (x/3)ln(x/3)-ln(3/x+(√9-x²/x))

Homework Statement √(9-x²) / (x²) Homework Equations Just trig substitution The Attempt at a Solution Ok, for trig sub I did u=asinΘ x=3sinΘ 9-x²=9-9sin²=9(1-sin²Θ) so putting it into the equation √9cos²Θ=3cosΘ/x^2 where do I go from here, I tried getting help at Math...

still looking for some start

What is the speed of the blue car? What is the speed of the red car?

Homework Statement A blue convertible of mass 1500kg is traveling south, and a red sport utility vehicle of mass 2100kg is traveling west. The total momentum of the system consisting of the two cars is 7500kg*m/s directed at an angle 65.0 west of south. Homework Equations The...

Homework Statement A glider of mass 0.143 kg is moving to the right on a frictionless, horizontal air track with a speed of 0.750 m/s. It has a head-on collision with a glider 0.303kg that is moving to the left with a speed of 2.13 m/s. Suppose the collision is elastic. Homework...

Thanks for all the help, I figured it out

Thanks, I got it. You guys are amazing