A=½(b+c)h solve for c

Hi there!

Your answer is:

c= -b + (2A)/H

First: Multiply both sides by 2

A= 1/2 (b+c)h

× 2

2A = (b+c)h

Next, divide both sides by h

2A/H = b+c

Finally, subtract b

2A/H -b = c

Hope this helps

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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c.)

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