Answer :
range is found by subsututing the domain in for x and seeing what comes out
f(2)=3(2)³=3(8)=24
f(5)=3(5)³=3(125)=375
range is [24,375]
f(2)=3(2)³=3(8)=24
f(5)=3(5)³=3(125)=375
range is [24,375]