Jeffrey mows lawns in his neighborhood. He earns $10, $23, $9, $11, $17, $21, $8 , $10, $27 and $18. What is the range?

154$

Step-by-step explanation:

10+23+9+11+17+21+8+10+27=154

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation: