How much will 9 pencils cost if 6 pencils cost $1.68?

Is a positive integer raised to a negative power always positive

The weight of an object in the water is 7% of its weight out of the water. what is the weight of a 652g object in the water?

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective