In a poll of 500 American High School students, .75% (p¯=0.75) said that they used the Internet for social purposes at least once a day. The goal is to construct a 99% confidence interval for the percentage (p) of American High School students who use the Internet for social purposes at least once per day around the period the poll was conducted.
The 99% confidence interval estimate of p is (Select one):

a) 0.44 ± 0.002
b) 0.44 ± 0.03
c) 0.75 ± 0.15
d) 0.75 ± 0.05

Suppose around the period the above poll was conducted, an Internet Company CEO made a personal statement saying that .85% of American High School students use the Internet daily for social reasons.
In light of the sample evidence and at the 1% level of significance, (Select one):

a. We can reject the commentator's claim
b. We cannot reject the commentator's claim

step-by-step explanation:

always plug in x. in this case, x equals 4.

i'm going to first solve 4(2+3x)

1) 4(2+3(4)) use pemdas to solve.

i'm going to multiply whats in the parenthesis first, so 3 times 4=12.

2)4 (2+12) i'm then going to multiply 4 by both numbers in the parenthesis (because multiplying comes before adding)

4 times 2= 8.   4 times 12= 48

4) (8+48)= 56 (answer)

i'm then going to solve 8+12x and plug in 4 for x.

1) 8 +12(4)

multiplying comes before adding, so i'm gonna multiply 12 and 4.

12 times 4= 48.

2) 8+48=56

both equal the same!

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.