A school is building a new playground. They have spent 75% of the money for the new playground. If they have spent $1200, what is the total amount of money they will spend to build the playground? ASAP

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)