Burning does the following a) takes up oxygen b) produces oxygen c) does both

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?

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

Simplify. 4+3/7x-2-2/7x a. 2-5/7x b. 6-1/7x c. 2+1/7x d. 6+5/7x