Three of the four golfers 1 l of water. the fourth golfer drinks 1.5 l of water. how many milliliters of water did the group drink in all?

me i can't frigure this out.

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25