The average height of 15-year-old girls is 63.8 inches, with a standard deviation of 2.66 inches. A teacher surveys her class of thirty-three 15-year-old girls and finds an average height of 62.6 inches. Required:
What is the percentile rank for this sample?

for the points! : )

seems like d

step-by-step explanation:

ok thats very interesting

"standard form:

3x2 + 14x − 10 = 0

solutions based on quadratic formula:

x1   = −14 − √ 142 − 4×3×(−10) /   2×3   = −14 − 2 × √ 79 /   6   ≈ −5.296

x2   = −14 + √ 142 − 4×3×(−10) /   2×3   = −14 + 2 × √ 79 /   6   ≈ 0.629