A8 year old boy has 7 different toys and wants put them all in a straight line. in how many ways can this be done

What are the coordinates of the midpoint of ab? ,1/2) /2,-1) ,-3/2) /2,-2)

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?

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.