The expression 1/2bh gives the area of a triangle where b is the base of the triangle and h is the height of the triangle. what is the area of a triangle with the base of 7cm and a height of 4 cm?

Find the volume v of the solid obtained by rotating the region bounded by the given curves about the specified line. y = x â’ 1 , y = 0, x = 5; about the x-axis v = sketch the region. sketch the solid, and a typical disk or washer.