F(x)=x2−3x+9f(x)=x2−3x+9
g(x)=3x3+2x2−4x−9g(x)=3x3+2x2−4x−9< br /> find (f−g)(x)(f−g)(x).
select one:
a. −3x3−x2+x+18−3x3−x2+x+18
b. 3x3+3x2−7x3x3+3x2−7x
c. 3x3+x2−x−183x3+x2−x−18
d. 3x3−x2−x

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: