Start with the formula: h=k \t
Substitute the values :<span> 2=k\65
</span><span>
then solve for</span> k: k=130
All you wanna do is divide-
490/3 1/2= 140
they make 140 buttons per hour
5% of $50 = 5/100 x 50 = $2.50
Total = 50 + 2.50 = $52.50
The saes tax is $2.50; her total cost of the shirt is $52.50