Aquart of stain covers 100 square feet. how many quarts should you buy to stain the ramp? (assume you do not have to stain the bottom of the ramp.)

270.6  or 2.7 Quart or about 3 quart of stain.

Step-by-step explanation:

From the given example, we recall the following,

A quart of stain covers (100) square feet

Let The 30 in. be  converted to 2.5 feet

Then,

The sides:

(30 x 2.5) ÷ 2 = 37.5

37.5 + 37.5 = 75

For the Back:

2.5 x 6 = 15

Top:

30.1 x 6 = 180.6

180.6 + 75 + 15 = 270.6  or 2.7

Therefore, about 3 quarts of stain is needed

step-by-step explanation:

i found the life tables for the year 2012. 

life table of males at age 30. probability of dying between ages x and x+1

total population:  

29–30 . . . . . . . . . . . . 0.001030

30–31 . . . . . . . . . . . . 0.001061

males:  

29–30 . . . . . . . . . . . . 0.001420

30–31 . . . . . . . . . . . . 0.001448

white population

29–30 . . . . . . . . . . . . 0.001005

30–31 . . . . . . . . . . . . 0.001037

white males

29–30 . . . . . . . . . . . . 0.001372

30–31 . . . . . . . . . . . . 0.001399

non hispanic white population

29–30 . . . . . . . . . . . . 0.001083

30–31 . . . . . . . . . . . . 0.001116

non hispanic white males

29–30 . . . . . . . . . . . . 0.001477

30–31 . . . . . . . . . . . . 0.001503

jacob, non hispanic white male. 30 years old.

probability that jacob lives to be 30 years old. 

since the given probabilities are probabilities of dying, i think we simply subtract it from 1 to get the probability of living. we will use the probability of non hispanic white male.

                                          probability of living to be 30 y.o.

29 - 30 : 1 - 0.001477 = 0.998523

30 - 31 : 1 - 0.001503 = 0.998497