Answer:
Given in the question itself ......1 would be 33 seconds .......................
The answer to Q1 along with an explanation is shown in the picture;
Having a look at all the questions, they are all essentially the same type so can all be solved similarly;
So by following the method and explanation, you should be able to do the rest of the questions.
Divide the amount of teenagers that smoked by the total population:

Multiply this decimal by 100 to convert into a percentage:

To round to the nearest decimal place, look at the hundredths value:
8.5
3
3 > 5
8.53 -> 8.5
8.5% of teenagers reported that they smoked at least one cigarette.
2x6=12
3x6=18
12+18=22
2x3=6
2x6=12
6+12=18
(7^0)^x = 1
7 power zero is 1.
(1^x) = 1
So x can be any value.
x could be, -2, -3, 1, 0, 3, 5, 1.8, -1.5,
x could be any number positive or negative or even zero.