Express 500ml as a percentage of 1 litre

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8

Peter applied to an accounting firm and a consulting firm. he knows that 30% of similarly qualified applicants receive job offers from the accounting firm, while only 20% of similarly qualified applicants receive job offers from the consulting firm. assume that receiving an offer from one firm is independent of receiving an offer from the other. what is the probability that both firms offer peter a job?

What unit of been sure would be appropriate for the volume of a sphere with a radius of 2 meters