PEMDAS is
Parenthesis
Exponets
Multiply
Divide
Add
Subtract
therefore, you would do 40*0=0+40+1=41
you will need 9 and 3/4 for the 13 pairs of butterfly wings. if you were doing that, the total price would be $78. if you needed to have a whole number for yards, you would round up to 10 and the total price would be $80
The acceptable first step in simplifying the expression
is (a) 
The expression is given as:

To change the form of the expression, we simply perform several arithmetic operations on it.
Start by multiplying the expression by 1/1

Express 1 /1 as (1 - sec x)/(1 - sec x)

Rewrite the above expression as follows:

Hence, the acceptable first step is (a)
Read more about trigonometry ratios at:
brainly.com/question/24888715
If we’re talking about tenths, it would be .5 meters, with .6 meters of wire left over
0.5 meters per strip
0.6 meters left over