Please answer this one correctly and don't type things like "funny" or don't type at all if its not an answer if you really HELP ME ILL MARK U BRAINLLIEST

Reflect the point (7,0) across the y-axis

List the sides of δrst in ascending order (shortest to longest) if: m∠r =x+28°, m∠s = 2x+16°, and m∠t = x+12

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.