78 hour is closest to . 56 hour is closest to . Therefore, the best estimate for the total time Jordan went swimming is close to
A. 0 hours
B. 1/2 hours
C. 1 hour
D. 2 hours
E. 3 hours

step-by-step explanation:

20% of 120 is 24. if you subtract 24 from 120 you get 96

36

step-by-step explanation:

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:

the first option i believe

step-by-step explanation: