Some of the largest drill pipes used in
extracting oil have a length of 20 m and
an inside diameter of 0.5 m. As oil flows
through such a pipe, what is the maximum
volume of oil in one pipe at any
given time?

If a and b are the measures of two first quadrant angles and sin a = 4/9 and sin b = 2/5 find sin(a+b).

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?

Alcoa was $10.02 a share yesterday. today it is at $9.75 a share. if you own 50 shares, did ou have capital gain or loss ? how much of a gain or loss did you have ? express the capital gain/loss as a percent of the original price