(a) Find the slope of the curve y= x^2 - 2x - 3 at the point P(2 -3,) by finding the limit of the secant slopes through point P. (b) Find an equation of the tangent line to the curve at P(2, -3)

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Which best explains why this triangle is or is not a right triangle?

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?