The archway to the entrance of an art gallery can be model by y= -1/3(x-5)(x+5) where x and y are measured in feet. The x-axis represents the floor. Find the width of the arch at floor level.

x=5 feet

Step-by-step explanation:

At floor level y=0

If the expression is:

But, with the negative sign, the answer is x= 5i (where i is imaginary)

you going to fail stop

step-by-step explanation:

by definition, an arc subtended by a central angle of some given measure has the same measure. so .