the answer to this question is $250
Answer:
BRO I DONT KNOW SORY I NEED POINTS
Step-by-step explanation:
Hi,
The sphere has for equation :(x+1)²+(y-3)²+(z+1)²=4
The xy plane has for equation z=0
The trace off the sphere in the xyplane is
(x+1)²+(y-3)²=4 (the circle of center (-1,3,0) &nd 2 as radius)
90% of 20 is x
20 times 90% is x
20 times .9 equals 18
The restaurant served 18 salmon filets.