If you change classes every 20 min. and there are 420 min. in a day how meny times do you change class

The cylinder shown has a volume of 54π cm3. In a similar cylinder, the dimensions have been doubled. What is the ratio of the volumes (small to large) ?

Simplify square root of 306

Fractions in simplest form have the denominator with terminating decimals; fractions with denominators of 6, 12, 18, and 24 produce repeating decimals. What is the difference?

40% of the marbles in the bag are yellow. the rest are orange and green. the ratio of the number of orange to the number of green is 4:5. if there are 30 green Marbles, how many yellow marbles are there?

How to add pie charts

432432 divided by the difference between 279279279 and 6363

The heights of women aged 20 to 29 are approximately normal with mean 64 inches and standard deviation 2.7 inches. men the same age have mean height 69.3 inches with standard deviation 2.8 inches.

Write this number in expanded form 208,000,478

How do fine the volume of a cone

Where do the lines modeled by the equations y = -7.8x+1.4 and y - 3.4x + 1.2intersect