What is the distance between -12 and -8

On average, how many more hits will he get when he bats 100 times at home during the day as opposed to 100 times away at night?

What is the approximate value of  x  in the equation below.–3.396–0.7080.3040.955

Aliter of water contains about 3.35 x 10^25 molecules. a certain river discharges about 2.9x 10^8 l of water every second. about how many molecules does the river discharge every minute? write your answer in scientific notation