40 In a school club, 35% of the members are girls. If there are 42 girls in the club, what is the total number of club members?
The number of club members changes during the school year. At the end of the year the number of girls is
still 42, but this now represents 40% of the club members. Has the total number of club members increased
or decreased? Explain your reasoning, and find the new total number of members.

Will give brainliestbased on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m?

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 three sides of a triangle have lengths of 4x+3, 2x+8, and 3x-10. what is the length of the shortest side if the perimeter of the triangle is 136cm?