16
select the correct answer.
for al, its atomic number is 13 and its mass number is 27. how many neutrons does it have?
o
a.
13
ه
ن
م
نا
40
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Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

The point (-7, -24) is on the terminal ray of angle 0 which is in standard position. a student found the six trigonometric values for angle e. the student's answers are shown. which value(s) are incorrect? sin(8) cos(8) 24 tan(0) sin(0)=25 cos(0) -- tan(ⓡ) - - 24 csc(o)=2 sec(0) --25 cot(6) - za csc(o) sec(0) cot(0) done