please help me with this math project (photo linked). (7th grade unit 3) check my other questions plsss

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2