A factory has enough oil on hand to last 30 days if 4 barrels of oil are used each day. How many barrels should be used each day if the same amount of oil is to last 40 days?

Find parametric equations for the line tangent to the curve of intersection of the surfaces at the given point. surfaces: xsquared2plus+2yplus+2zequals=1212 yequals=33 point: left parenthesis 1 comma 3 comma five halves right parenthesis

Find the amount in a continuously compounded account for the given condition. principal: $1000, annual interest rate: 4.8%, time: 2 yr

#1-20 state whether the angles are alternate interior, alternate exterior, vertical, or corresponding angles.