Answer:
20
Step-by-step explanation:
The number 3 will appear in the numbers 3, 13, 23, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 43, 53, 63, 73, 83, 93. In these numbers it appears 20 times.
8 hours = 1 day
24 hours = 3 days
187.42/24
Round it up and it will give you $7.80/hour
35 d
∆=3*6=18
[]=5*15=75
75+18=93 in squared