Arectangle is 3 times as long as it is wide. if the area is 12 square feet find its perimeter.

Length=3*width
area=12
3W*W=12
w^2=4
w=2
l=6

perimeter=2(l+w)
                =2(2+6)
                 =16

Gotta be d the music of previous eras

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post