Evaluate R y sin(xy) dA, where R = [3, 9] × [0, π]. SOLUTION 1 If we first integrate with respect to x, we get R y sin(xy) dA = π 0 9 3 y sin(xy) dx dy = π 0 x = 9 x = 3 dy = π 0 dy = π 0 = .

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?