A philosophy professor assigns letter grades on a test according to the following scheme. A: Top 12% of scores

B: Scores below the top 12% and above the bottom 56%
C: Scores below the top 44% and above the bottom 20%
D: Scores below the top 80% and above the bottom 9%
F: Bottom 9% of scores

Scores on the test are normally distributed with a mean of 78.6 and a standard deviation of 9.5. Find the minimum score required for an A grade. Round your answer to the nearest whole number, if necessary.

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you

72 is the answer to this problem

no he doesnt because "-16' is negatiive

step-by-step explanation:

your answer would be 12