Which situation best represents a proportional relationship? A 20 × 24-inch photo is reprinted into a 5 × 6-inch photo.

A 20 × 24-inch photo is reprinted into a 5 × 6-inch photo.

A turtle traveled 1 meter in 1 hour and 2 meters in 2.5 hours.

A turtle traveled 1 meter in 1 hour and 2 meters in 2.5 hours.

Two pencils are sold for $1. Ten of the same pencils are sold for $6.

Two pencils are sold for $1. Ten of the same pencils are sold for $6.

One apple had 6 seeds, two apples had 8 seeds altogether, and 3 apples had 10 seeds altogether.

What power can you write to represent the volume of the cube shown? write the power as an expression with a base and an exponent and then find the volume of the cube

Extra points! find the missing dimension! need asap

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.