The temperature outside was -9 °C when Arnaq went to the Kaatiluta celebration at the recreation center in
Nome, Alaska. When she went home after the
celebration was over, the temperature outside had
increased by 5°C. What was the temperature when Arnaq went home? PLEASE ANSWER ASAP

Ineed with number 6 , explain how to get 1978

Aprisoner is trapped in a cell containing three doors. the first door leads to a tunnel that returns him to his cell after two days of travel. the second leads to a tunnel that returns him to his cell after three days of travel. the third door leads immediately to freedom. (a) assuming that the prisoner will always select doors 1, 2 and 3 with probabili- ties 0.5,0.3,0.2 (respectively), what is the expected number of days until he reaches freedom? (b) assuming that the prisoner is always equally likely to choose among those doors that he has not used, what is the expected number of days until he reaches freedom? (in this version, if the prisoner initially tries door 1, for example, then when he returns to the cell, he will now select only from doors 2 and 3.) (c) for parts (a) and (b), find the variance of the number of days until the prisoner reaches freedom. hint for part (b): define ni to be the number of additional days the prisoner spends after initially choosing door i and returning to his cell.

The average car sold from dealership a is 25,700. if the salesperson receives 1.5% commission on the price of the car, how much commission is made on a average per car sold