Continental Congress. Franklin returned to Philadelphia in 1775. There he served as a delegate to the Continental Congress, where he was instrumental in drafting the Declaration of Independence and the Articles of Confederation to form a new union.
In its simplest form (when r is an integer), the negative binomial distribution models the number of failures x before a specified number of successes is reached in a series of independent, identical trials. Its parameters are the probability of success in a single trial, p, and the number of successes, r. A special case of the negative binomial distribution, when r = 1, is the geometric distribution, which models the number of failures before the first success. More generally, r can take on non-integer values.
negative exponent means you move it to the denominator. So -7^-4 = 1/-7^4. This would be -1/2401, or approximately -.0004. Note that this would be positive if -7 was in parenthesis, because a negative number raised to the fourth power is positive. it doesn't become -196 reciprocal it and change the exponent to positive -7^-4 becomes -1/7^4 = -1/2401.