1. Express the following in the form 10^n, where n is an integer. a) 10^8 ÷ 10^4

(plz explain how u did it)

Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β

Find the values of y: 3y^3(y^2+ 2/3y)=0

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m