Sonja had m books and alfonzo had twice as many, the two together having 18 books. how do you solve?

Solve the equation w^3 = 1,000 i honestly dont know how to punch this into a calculator pls

Suppose that in 2008 , 840,800 citizens died of a certain disease assuming the population of teh country is 399 miliion, what is the mortality rate in units of deaths per 100,000 people?

Adesigner charges a one time fee of $200 plus $40 an hour for each project. write an expression to represent how much money the designer will make for a project