Answer:
Its the last one I beleive not sure
Step-by-step explanation:
Given that Rolex buys computer disks at a price of 4 for $5 .
That means cost price of 1 disk = 5/4
Given that Rolex sells them at a price of 3 for $5.
That means selling price of 1 disk = 5/3
Profit on 1 disk = selling price - cost price
Profit on 1 disk 
Profit on 1 disk 
Profit on 1 disk 
Profit on 1 disk 
Now we have to find how many disk to be sold to get the profit $100
so we just divide $100 by profit on 1 disk

Hence final answer is 240 disks.
Answer:
b
Step-by-step explanation:
Out of 135 adults, 85 were employed
85/135 is your fraction form
85/135 = 0.629 (decimal form)
0.629 (move the decimal point to the right two place values) = 62.9% (percent form)
hope this helps