5. Identify the interval(s) on which the function y = x2 - 4x – 21 is negative.

(a) (8%) compute the probability of an even integer among the 100 integers 1! , 2! , 3! , until 100! (here n! is n factorial or n*(n-1)*(n-2) *… 1) (b) (16%) compute the probability of an even integer among the 100 integers: 1, 1+2, 1+2+3, 1+2+3+4, …., 1+2+3+… + 99, and 1+2+3+… + 100

Which choice represents the sample space ,s for this event

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12