Answer:
125.66cm²
Step-by-step explanation:
so you need to find the area of the big circle and subtract it from the area of the small circle
area of a circle= π r²
small circle: substitute in what you know
a= π x 3²
a= 28.2743
big circle: substitute in what you know
a= π x 7²
a= 153.9380
now do 153.9380-28.2743=125.6637
now round this number to the nearest hundredth:
125.66cm²
