(1.0395)(10)^9 in standard notation

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?

Answer asap evaluate 4-0.25g+0.5h4−0.25g+0.5h when g=10g=10 and h=5h=5.