13.33 is the correct answer
just multiply 45 time 31!
First term =a1=5
common difference=7.5-5=10-7.5=2.5
so an=a1+(n-1)d
so
an=5+(n-1)*2.5
an=5+2.5n-2.5
an=2.5+2.5n
Answer:
360
Step-by-step explanation:
A circle has 360 degrees.
Here lesson started at 9 and finished at 10.
This means that her lesson was one hour.
A minute hand makes a full rotation in an hour.
It would have started at 12, and ended back at 12.
This means that it rotated 360 degrees.