What is 7 times 7 pls help

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

Select the number of ways in which a line and a circle can intersect

Acertain volume of water contains 100000 hydrogen atoms and 50,000 oxygen atoms how many hydrogen atoms are in a volume of water containing 4 million oxygen atoms