You are working for the meteorological department in hawaii. your job is to track the amount of rainfall received on 50 sites across hawaii through the year. this type of statistical study is ? ?
a). a survey
b). an experiment
c). an observation

The correct answer is - C). an observation

Step-by-step explanation:

Your job is to track the amount of rainfall received on 50 sites across Hawaii through the year.

This type of statistical study is called an observation.

This is an observational study because you are simply observing the amount of rainfalls throughout the year.

18 units²

step-by-step explanation:

first let's find altitude bd using the distance formula

d = √((y₂ - y₁)² + (x₂ - x₁)²)

bd = √((0 - -3)² + (0 - 3)²)

bd = √18

given the placement of points a and c, we can denote that point d bisects segment ac.

we will call ac the base.

using the distance formula

ac = √((0 - 6)² + (-6 - 0)²)

ac = √72

knowing our base and our height, we can plug these into our triangle area formula

area = (b * h)/2

area = (√18 * √72) / 2

area = (√1296) / 2

area = 36 / 2

area = 18 units²