There are 120 planes. 2/3 are parked. 2/5 are jets and 1/8 are ready for take off. what fraction of the total are not jets

41/120

2/3 of 120 is 80, you have 40 left

2/5 of 40 is 16, you have 24 left

1/8 of 24 is 3.

Subtract those totals and you will get 41 leftover.

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:

x= 3^y

step-by-step explanation: