Asap plz ! calculate the mean and the uncertainty for each !

Asolution has a ca2+ concentration of 0.049 m and an f- concentration is 0.147 m at equilibrium. the value of ksp for caf2 at 25°c is 4.0 x 10-11. will this solution form a precipitate? yes no

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)

What effect might melting sea ice have for people who live in coastal areas?