F two states are selected at random from a group of 20 states, determine the number of possible outcomes if the group of states are selected with replacement or without replacement.

Given the expression (7 ? 4i) ? (2 + 6i), perform the indicated operation and write the answer in the form a + bi.

Idon't want to fail summer school.the probabilities of contamination in medicine capsules due to the presence of heavy metals and different types of microbes are given in the table.the probability of capsule b having microbial contamination is (the same as, greater than, less than) the probability of capsule d having it.

Factor this polynomial completely. 12x^2+ x-6