What is the area of the rectangle?

15/63 or reduced to 5/21

Step-by-step explanation:

5 x 3 = 15

9 x 7 = 63

15/63 / 3 equals 5/21

Step-by-step explanation:

Multiply * to get your answer

(Reduce it)

(Reduce it further)

(You are done)

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: