Complete the square for the expression

x^2 + 8x +16

Step-by-step explanation:

Use the formula

( b/2 )^2

*the b in this trinomial would be 8

in order to create a new term in order to find the perfect square trinomial.

good job you smart son of a gun you are smarter that einstein. 7

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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: