Answer:
Displacement will be 11 revolution and 1.02π radian
Step-by-step explanation:
We have given that initial angular position = 0.45 radian
Angular speed 
Time is given as t = 8.8 sec
So angular displacement in 8.8 sec

As he has already covered 0.45 radian
So total angular displacement = 0.45 + 71.8432 = 72.2932 radian
We know that 1 revolution = 2π = 2×3.14 = 6.28 radian
So 11 revolution = 11×6.28 = 69.08 radian
Left dispalcement = 72.2932 - 69.08 = 3.2132 radian = 1.02π radian
<span>Let Mia's age be m and her sister's age be x
m=2x+3
2x+3+x=less than 30
For greatest age we need to take largest number.
3x+3=29
x=26/3
But the options are all in whole numbers, so if
3x+3=27
then x =8</span>