How do i solve math problems 23 and 25?

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)

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