In a survey, 300 shoppers were asked whether they have access to a computer at home and if they have a personal e-mail account. Their responses are summarized in the following table.
E-Mail account
No e-mail
account
24
Computer access at home
No computer access at home
90
18
168
(a) What percentage of the shoppers do not have an e-mail account?
(b) What percentage of the shoppers do not have computer access at home?
(a) [%
Х
$
?
(b) 1%
Explanation
Check
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Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle