Answer:
The constant of proportionality in the equation y=0.41 is 0.41
Step-by-step explanation:
easy
5% is .05 two decimals to the left
55 x .05 = 2.75
$2.75 is your sales tax
55+2.75=$57.75
Remember that an exponent means repeated multiplication.
The exponent of 4 means you have four
's mutiplied together:

And then each exponent of 2 inside means you have two
's multiplied inside each set of parentheses.:

There are 8 b's there when you expand this out.
It would come out as an error because you cant divide nothing by nothing. There is nothing there to divide
Maybe if you need to measure a piece of clothing