Janessa wants to order these fractions: 4/9, 2/3, 1/6, -2 1/2. what should she use as her common denominator?

18

Step-by-step explanation:

The given fractions are:

We can change the mixed number to a proper fraction to get;

Janessa needs to find the least common multiple of the denominators.

The denominators are;

We can express each of the denominators as product of primes.

The least common multiple of these numbers is the product of the highest powers common to all the numbers.

The LCD is

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'.