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Graph f(x) = (x-1)(x+2) find the domain, vertical asymptote, horizontal asymptote, x-intercept, and y-intercept? Please help with steps to find the area of the region bounded by the curves - local band is point of origin. Thanks!? Is this SIMPLE math Problem correct?? If something costs $60.00 but its on sale for $40.00, how much percent off is that? How was the cov( X(s), X(t)) obtained. i know that E[x(s)] * E[x(t)] = 0 but i don't know how to calculate E[x(s) x(t)]?