In the triangle below, what is the cosine or 30 degrees

Which expression is equivalent to (9x - 3 1/ + 1 3/8)

(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

What is the value of x in the equation (2)3) (x+6)= -18 a. -36 b. -33 c. -24 d. -18