17) there are 15 boys and 18 girls in seventh grade. find the ratio of boys to girls in seventh grade.

18) janet bought 12 guavas and 16 apples. what is the ratio of guavas to apples?

19) sandy has 8 candies and tabitha has 10 candies. find the ratio of sandy’s candies to tabitha’s candies.

20) for a birthday party, evelyn orders 10 chicken pizzas and 15 vegetable pizzas. find the ratio
of chicken pizzas to the vegetable pizzas.

21) in a local animal sanctuary, there are 48 deer and 64 monkeys. find the ratio of deer to monkeys.

22) gerry scored 56 in math and 84 in science. find the ratio of his scores in math to science.

23) a fruit seller bought 75 mangoes and 125 apples from vendor. find the ratio mangoes to apples bought.

24) yulee primary school maintains a library with 81 english books to every 90 math books. find the ratio of english books to the math books.

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.

Determine the required value of the missing probability to make the distribution a discrete probability distribution. x p(x) 3 0.23 4 ? 5 0.51 6 0.08 p(4) = nothing  (type an integer or a decimal.)

Submarines control how much they float or sink in the ocean by changing the volume of air and water contained in large ballast tanks. when the tanks are completely full of water, the submarine increases its overall mass and sinks down to the bottom. when the tanks are completely full of air, the submarine reduces its overall mass and floats to the surface. depending on the density of the seawater surrounding the submarine, it will pump seawater in or out of the tanks in order to achieve the same overall density as the sea water and float neutrally in the water. the volume of the submarine never changes. when the tanks are completely full of water, a submarine with a volume of 7.8\times10^3\text{ m}^37.8×10 3 m 3 7, point, 8, times, 10, start superscript, 3, end superscript, space, m, start superscript, 3, end superscript has a total mass of 8\times10^6\text{ kg}8×10 6 kg8, times, 10, start superscript, 6, end superscript, space, k, g. the density of the seawater is 10^3\text{ kg/m}^310 3 kg/m 3 10, start superscript, 3, end superscript, space, k, g, slash, m, start superscript, 3, end superscript. to make that submarine float neutrally, and neither float nor sink in the ocean, what volume of water does that submarine need to subtract from its tanks?