Answer:
He can grade 1.25 assignments in 1 minute.
Step-by-step explanation:
Because the teacher can grade 25 assignments in 20 minutes, we can dive 25 by 20 to get the constant rate.

So he can grade 1.25 assignments in 1 minute.
Answer:
Step-by-step explanation:
tHE center is F
the radio is from f to h
the chord is from r to U
and the diameter is from N to M