Perpendicular lines are two distinct coplanar lines that intersect to form what type of angle?

The expression 1.01*1.005(^t) gives the amount of money, in thousands of dollars, in carter's savings account (t) years after he opens it. what does 1.01 represent in this expression?

Who long does it take to drive 150 miles at 45 miles per hour

Robin and john each a a 12 inch pizza about how many square inches of pizza did they eat? estimate how much pizza they ate