Help pls and thank you

Which is the standard form for this number? (4 x 1 100 ) + (8 x 1 1,000 ) + ( 3 x 1 100,000 ) ? a) 0.004803 b) 0.04803 c) 0.0483 d) 0.483

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals