Pooya T.

In deriving the Quadratic Formula, near the end all the derivations I see convert sqrt(x2) to x. But sqrt(x2) = |x|.

Question: Find the surface area of the portion of the sphere x^2 + y^2 +z^2 = 4 that lies inside the cylinder x^2 + y^2 = 2yMy work: Let f(x,y) = sqrt(4- x^2 - y^2)F(x,y,z) = f(x,y) - z Required... more

Prove the following claim holds ∀n ∈ Z≥0 by induction on

B = {2 - 9x, 1 - 4x}C = {3x - 2, 3x - 3}for the vector space P2E = {1, x}Find the transition matrix from C to B= ???

Consider the following relation R on the set A = {1, 2, 3, 4}: R = {(1, 2), (2, 3), (3, 1), (4, 1)} Find the transitive closure of this relation.

Marginal cost function for a publisher of a novel isYc’ = 9 - (16√2x)/3xTC pesos is the total cost producing x items. The overhead cost is P100. What is the cost total function, the average cost... more

In how many ways can 10 identical laptops be distributed among five electronic stores if (a) there are no restrictions? (b) each store gets at least one? (c) the largest store gets at least three?... more

A block and tackle with a mechanical advantage of 48 is used to lift a piano 11 m to the third floor of a building. Although the arrangement of pulleys in the block and tackle makes it easy to lift... more

You have landed a summer job as the technical assistant to the director of an adventure movie shot here in Ohio. The script calls for a large package to be dropped onto the bed of a fast moving... more