Step-by-step explanation:
The sine of an angle is the same as the cosine of its complement.
If sin 30° = ½, then cos 60° = ½.
Fraction of household owning pets = 

Conclusion:
The fraction of the household own cats is <em>two-fifteenth </em>
Answer:
$26
Step-by-step explanation:
4 times a week, $15 a day
It means that he have to pay $60 a week for travelling
$60-$34 = $26
By buying the pass I can save $26 a week