2 dot plots on number lines going from 80 to 100 in increments of 2. For Deanna's Quiz Scores, there are 0 dots above 80, 82, and 84, 2 dots above 86, 3 above 88, 3 above 90, 2 above 92, 3 above 94, 2 above 96, and 0 above 98 and 100. For Amy's Quiz Scores, the are 0 dots above 80, 2 above 82, 1 above 84, 2 above 86, 1 above 88, 2 above 90, 1 above 92, 2 above 94, 3 above 96, 1 above 98, and 0 above 100. Use the dot plots to answer the questions. Deanna’s mean quiz score is approximately . Amy’s mean quiz score is approximately .

Deanna’s mean quiz score is approximately is 90.93                                    Amy’s mean quiz score is approximately is 90.27

Step-by-step explanation:

:)

answer: c

(2, -4)

goes 7 to the

(9, 4)

easy

step-by-step explanation:

part a. the differences are decreasing, so we know the sequence is not arithmetic. the ratios are constant (=3/4), so we know the sequence is geometric.

part b. from part a, we know the common ratio is 3/4, so each term is 3/4 of the one before. the initial term is the number of gallons at h=1.

g[h] = (3/4)·g[h-1]

g[1] = 384 . . . . initial value required for a recursive definition

part c. the general formula for a geometric sequence is

a[n] = a[1]·r^(n-1)

we have a[1] = 384, r = 3/4, and the term number given by h. the formula that follows is

g[h] = 384·(3/4)^(h-1)

part d. filling in the value and doing the arithmetic, we have

g[12] = 384·(3/4)^11 ≈ 384·0.042235136 ≈ 16.2183 . . gallons

part e. each gallon is 4 quarts, so

16.2183 gal × 4 qt/gal = 64.8732 qt