The cincinnati enquirer reported that, in the united states, 66% of adults and 87% of youths ages 12 to 17 use the internet. use the reported numbers as the population proportions and assume that samples of 300 adults and 300 youths will be used to learn about attitudes toward internet security. what is the probability that the sample proportion of adults using the internet will be within + or - 0.04 of the population proportion?

The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap

Which diagram best shows how fraction bars can be used to evaluate 1/2 divided by 1/4?