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peter used black tiles and white tiles to cover a rectangular floor that is 10 feet long by 9 feet wide. each tile is a 6-inch by 6-inch square. if the ratio of white tiles to the total number of tiles is 2: 5, how many white tiles were needed for the floor?

a: 60

b: 36

c: 144

d: 240

Which description is represented by a discrete graph? kiley bought a platter for $19 and several matching bowls that were $8 each. what is the total cost before tax? the temperature at 9 a. m. was 83° f and is heating up at an average rate of 6°f per hour. what is the temperature x hours later? juan ate an egg with 78 calories and some cereal with 110 calories per serving for breakfast. what is the total amount of calories he consumed? a bottle contained 2,000 ml of liquid and is being poured out at an average rate of 300 ml per second. how much liquid is left in the bottle after x seconds?