Ajet took 4 hours to fly 1800 miles against a head wind, jets speed was 525 miles per hour what was the wind speed

The wind speed is 75 mph

The calculation can be done as follows

Time= 4 hours

Distance= 1800 miles

jets speed= 525 miles

The wind speed can be calculated as follows

= 4 × 525

= 2100 miles

2100 miles- 1800 miles

= 300 miles

= 300/4

= 75 mph

Hence the wind speed is 75 mph

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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: