Mr Crosby has a jar with 10 green marbles, 7 red marbles and 3 blue marbles. After mixing them up he has a student pick 1 marble out , put it back, and pick another marble out. What are the odds that he will pick a blue marble first and then a green marble?

we can't see all full 4 options, but if this is the full option, than the very left one is correct:

-2/5 * -3 3/4

remake the question, adding a picture of all the question, or write down the full left and right answers.

answer is 270 degrees: -

to convert radians to degrees you multiply by 180/π

9π/ 6 * 180 / π

=   9 * 180 / 6

= 9 * 30

=   270 degrees   answer

the answer is c.

perimeters = 3√10/5

areas = 90/25

i got it down chief.