Danny C.

Business Weekly conducted a survey of graduates from 30 top MBA programs. On the basis of the survey, assume the mean annual salary for graduates 10 years after graduation is 130000 dollars. Assume... more

For what value of the constant c is the following function continuous at x = −4? f(x) = { ( 1/x + 1/4)/x+4 if x doesn't equal -4 or 0 { (c) if x = -4

A stone is dropped from the top of a building such that its height, in feet, is given by s ( t ) = − 16 t^2 + s_0.It makes impact with the ground with a velocity of − 145 ft/s .

 Velvetleaf is a particularly annoying weed in cornfields. It produces lots of seeds, and the seeds wait in the soil for years until conditions are right. How many seeds do velvetleaf plants... more

A bag contains 8 black balls,3 red balls, and 9 white balls. if three balls are drawn at random with replacement. what's the probability that (a) the balls are all black (b) two balls are black and... more

Show that if AB is invertible, so is B.

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Assuming all matrices are nxn and invertible solve for D BCAT DCBT A= BCT  

Assume X be a finite set of order n≥1 which has been partitioned into t non-empty, pairwise disjoint, subsets, X=P1∪ P2 ∪⋯∪ Pt, some t≥1.Consider the case when t=1. Show that there is a group which... more

Let A4 be the alternating group on 4 elements. 1) Find all of its elements and put them in the form of product of disjoint cycles 2)Find all subgroups of A4 isomorphic to K4 -Klein 4... more