1. 8.43 x 10-9 seconds is described using metric prefixes as 8.43 _____________________.

2. A person leans into and pushes against a stationary wall with a force of 60 pounds.In turn, the wall pushes back against the person with a force of

A). Less than 60 lbs

B). Exactly 60 lbs

C). More than 60 lbs

D). It depends on the weight of the person.