Just put it in a calculator, it’s 3600 divided by 40
Subtract x from both sides of the equation, this will allow only one side to have a variable.
So.. if you notice the picture below.. .the length is that much
thus

take the derivative of A, zero it out, and then check the critica points for any maxima by using the first-derivative test
Answer:
5s
Step-by-step explanation:
Algebraic rule
s is a variable and it is an unspoken rule to multiply them if they are next to one another without a mathematical sign