What is 738620 rounded to the nearest hundred thousand

Which math sentence can be used to determine if the triangle is a right triangle?

If olu is twice as old as funmi if the sum of their ages is 60 how old is olu

Asource of laser light sends rays ab and ac toward two opposite walls of a hall. the light rays strike the walls at points b and c, as shown below: what is the distance between the walls?