Define signal x(t) = u(t−1)−u(t−2.5)−2δ(t− 4)+δ(t −6). (a) sketch y(t) = $ t −[infinity] x(τ )dτ . (b) describe a simple change that can be made to the right-most delta function in x(t) so that y(t) = $ t −[infinity] x(τ )dτ has finite energy. (c) sketch z(t) = $ [infinity] t x(τ )dτ . (d) determine real constants a and b so that w(t) = x ? t−a b ? has a region of support

What is the range? can’t seem to find it out

Match the scale and the actual area to the area of the corresponding scale drawing. scale: 1 inch to 4 feet actual area: 128 square feet scale: 1 inch to 7 feet actual area: 147 square feet scale: 1 inch to 8 feet actual area: 256 square feet scale: 1 inch to 5 feet actual area: 225 square feet area of scale drawing scale and actual area scale drawing area: 3 square inches arrowright scale drawing area: 8 square inches arrowright scale drawing area: 4 square inches arrowright scale drawing area: 9 square inches arrowright

Simplify (8x2 − 1 + 2x3) − (7x3 − 3x2 + 1). −5x3 + 11x2 − 2 5x3 − 11x2 + 2 x3 + 2x2 + x3 x3 − 2x2 − x3