5. Why did it take 2 years for the U. S. to enter WW2 and why did we finally enter the war?

The diameter of a circular chip is doubled to use in a new board game. the area of the new chip will be

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?

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of