The function f, where f(n)=1200n+3500 represents the number of people in a town who owned a smartphone n years after 2007. how many people owned a smartphone in this town in the year 2010?

Step-by-step explanation:

we have

where

f(n)---> represents the number of people in a town who owned a smartphone

n ---> the time in years after 2007

In the year 2010

The value of n is

n=2010-2007=3

so

For n=3 Evaluate f(3)

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square

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: