A manatee surfaced for air 2 times in 60 seconds. how many seconds went by before the manatee surfaced the first time if it held its breath for the same rate? explain you're answer​

30 seconds.

Step-by-step explanation:

If it surfaced twice in 60 seconds it is surfacing every 30 seconds.

It will surface in 30 seconds.

good luck!

cutie~

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'.