True or false?
1.every square is a rectangle.
2.every rhombus is a quadrilateral.
3.every rhombus with four right angles is a square.
4.every quadrilateral is a rectangle.

Consider the graph of the exponential function y=3(2)×

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.