(c Alice leaves her house, driving east at 45 miles
per hour (mph). Thirty minutes later, her
husband Dave notices she forgot her cellphone
and sets off after her. How fast must Dave
travel in order to catch up with Alice 3 hours
after he leaves?
14.

:calculate the sum of the interior angles of a 13-sided polygon.

Reason i shouldnt turn back if i'm lost in the wilderness need fast

Geologists know that potassium-40 decays to argon-40, with a half-life of 1.3 billion years. if an analysis of a feldspar crystal in a sample of granite shows that 75 percent of the potassium-40 atoms have decayed to form argon-40, what is the age of the granite