The pew internet and american life project finds that 95% of teenagers (12–17) use the internet and that 81% of online teens use some kind of social media. of online teens who use some kind of social media, 91% have posted a photo of themselves. state: what percent of all teens are online, use social media, and have posted a photo of themselves?

The percent of all teens are online, use social media, and have posted a photo of themselves are:

                     70% (approx)

It is given that:

95% of teenagers  use the Internet this means that the teens are online.

This means that 95%=0.95.

and 81% of online teens use some kind of social media.

i.e. 81%=0.81

and  Of online teens who use some kind of social media, 91% have posted a photo of themselves.

i.e. 91%=0.91

Now we are asked to find the percent of teens who are online, use social media, and have posted a photo of themselves

i.e. The percent is: (0.95×0.81×0.91)×100

                             =  70.0245%

which is approximately equal to 70%

The percent of all teens are online, use social media, and have posted a photo of themselves 70% (approx)

Step-by-step explanation:

problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

i hope this !