Write in point-slope form an equation of the line that passes through the point (1, 4) with slope -2.

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π

Convert the density of surface sea water to metric tons/cubic meter

Me with these questions , i don’t understand scientific notation!