There are 12 boys and 16 girls in Marco's class (including Marco).What is the probability that a student chosen at random from Marco's class will be a boy?

3:4 ratio or 3/4

Step-by-step explanation:

good job you smart son of a gun you are smarter that einstein. 7

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.