Help please really don’t know what the answers is

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

Starting at home, emily traveled uphill to the hardware store for 606060 minutes at just 666 mph. she then traveled back home along the same path downhill at a speed of 121212 mph. what is her average speed for the entire trip from home to the hardware store and back?