During his high school football career a running back averaged 81 yards/game with a standard deviation of 22 yards/game. The distribution of his yards was approximately Normal.
What percent of his performances would you expect to be between 81 and 147 yards?

for b its (t) and c its (d)

step-by-step explanation:

dilation scale factor 2: starting with δabc, draw the dilation image of the triangle with a center at the origin and a scale factor of two. notice that every coordinate of the original triangle has been multiplied by the scale factor (x2). dilation with scale factor 2, multiply by 2.

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