On a blueprint with a scale of 1 cm = 4 ft, the length of the wall is 9 cm. if the scale of the blueprint were 1 cm = 3 ft, whats would be the length of the wall?

The length of the wall would be  12 cm

Step-by-step explanation:

step 1

we know that

On a blueprint with a scale of 1 cm = 4 ft, the length of the wall is 9 cm

so

The actual length of the wall is equal to > 9*4=36 ft

step 2

If the scale of the blueprint were 1 cm = 3 ft

then

The length of the wall in the new blueprint would be  > 36/3=12 cm

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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