Find the perimeter of the triangle

How many square feet of out door carpet will we need for this hole? 8ft 3ft 12ft 4ft

Which is the standard form for this number? (4 x 1 100 ) + (8 x 1 1,000 ) + ( 3 x 1 100,000 ) ? a) 0.004803 b) 0.04803 c) 0.0483 d) 0.483

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=