In a recent year, 22.7% of all registered doctors were female. If there were 43,800 female registered doctors that year, what was the total number of registered doctors?
Round your answer to the nearest whole number.
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Carson has only $20 bills and $10 bill in her wallet. the total value of the bills is $50. she has 1 more $20 bill than $10 bills. how many each kind of bill does carson have? a. one $20 and two $10 bills b. two $20 bills and one $10 bill c. one $20 bills and three $10 bills d. two $20 bills and two $10 bills

Me. i can't figure out this question. give an explanation too. .

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?