47. The side lengths of the flat, trapezoidal ceiling of a bedroom are given in the figure below. Marie will
paint the entire ceiling with 1 coat of paint, using paint
that has a price of $8 per quart and is sold only by the
full quart. Each quart of paint covers an area of
90 square feet with 1 coat of paint. What is the total
price of the paint that Marie needs to buy?
12 feet
20 feet
16 feet
A. $8
B. $16
C. $24
D) $32
E. $40
24 feet

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?

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.

Savannah had 40 iris blooms last year this year she had 15% more iris blooms how many more hours blooms did savannah have this year