2. Which of the following is not an example of a perfect square?

a. 9
b. 200
C. 4
d. 64

Suppose that in 2008 , 840,800 citizens died of a certain disease assuming the population of teh country is 399 miliion, what is the mortality rate in units of deaths per 100,000 people?

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122