Curtis builds a doghouse with shaped like a cube and a roof shaped like a pyramid. the cube has ab edge length of 3.5.the height of the pyramid is 5 feet. find the volume of the doghouse rounded to the nearest tenth. asap

The formula for the volume of a cube is V = lwh, where l is the length, w is the width and h is the height.  The volume of our cube would then be V=3.5(3.5)(3.5)=42.875 ft.
The formula for the volume of a pyramid is V = 1/3lwh.  For our pyramid it would be V=(1/3)(3.5)(3.5)(5)=20.417.
The total volume is found by adding these two figures together:
42.875+20.417=63.292≈63.3 ft after rounding to the nearest tenth.

No a triangle cannot be formed because when you add the two smallest number together (which would be 11) the have to be bigger than the number it is "against" ( which would be 12)

Number 40 is a rational number glad i could