Calculate the discriminant to determine the number of real roots.

y = x2 – 6x + 9.

how many real roots does the equation have?
(points : 5)
one real root
two real roots
no real roots
no solution to the equation

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?

Rena is building a 1: 180 scale model of a real castle. her model has a rectangular base that is 3 feet wide and 4 feet long what is the area of the base of the actual castle in square feet