Arailroad crossing sign is a circle with a diameter of 30 in. the manufacturer makes 6 railroad crossing signs from the sheet of aluminum by arranging the signs as shown. about in2 of aluminum is left over after the signs have been made. (enter only the number rounded to the nearest square inch.)

Gg easy

find the area of 1 circle then times 6
find area of whole sheet
minus area of circles from area of whole sheet

area of circle=pir^2
d=30
d/2=r=30/2=15
area=pi15^2
area=pi225
6 circles so times 6
225pi times 6=1350pi
aprox pi=3.141592 to evaluate
4241.1492 in^2

area of sign=90 by 60=5400

area not used=sheet-signs
areanotused=5400-42441.1492=1158.8508
round
1159

answer is 1159 in^2 unused
aprox pi=3.14