43. Apartment numbers are needed for the doors of a new apartment complex. Each single digit from 0 through 9 costs $0.10. What is the total cost for all the single digits needed to number the doors from l through 30 ?

Answer and Explanation

Your Answer is

Correct Answer is C

Explanation

It can be seen from the meaning of the question: each number of 0-9 on the house number costs 0.1 US dollars, then in 1-30, 1-9 costs 0.9 US dollars, 10-30 costs 4.2 US dollars, and the total cost is 5.1 US dollars, the answer Choose C.