Parallel lines s and t are cut by a transversal r. Which angles are corresponding angles?
<3 and <7
<1 and <7
<4 and <6
<1 and <8

Can someone me with 3 and 4 plz. this is for masteries test.

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o

If 15 drops of ethanol from a medicine dropper weigh 0.60g, how many drops does it takes from a dropper to dispense 1.0ml of ethanol? density of ethanol is ethanol is 0.80g/ml.