Determine if a triangle is a right triangle with the given sides: 9,12,15
Yes or No

What is the ratio for the surface areas of rectangle prisims shown below given that they are similar and that the ratio of their edge lengths is 7: 3

Which expression is rational? 6. , square root two, square root 14, square root 49

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?