Answer:
Randomized
Explanation:
Observational Studies and Randomized Trials are two ideal ways of determining the outcome of certain tests.
In the Observational course the study is conducted in a true to life scenario and the result of what happens is recorded. Meanwhile, in the Randomized Trial there purposefully placed conditions that are ideal and these are evaluated after specific interventions.
Since the pool manager did not let different pools grow algae at will before putting in the chemical this study would not be considered observational. Instead he set up three different pools of the same size with the similar amount of contaminants and then tested the algaecide. This classifies this as a Randomized Trial.
Prefix - in
The prefix /in/ means not. This prefix is often used to create the negative of the root word. Other words that use /in/ to create a negative are indecision and inedible.
Suffix - ous
The suffix /ous/ is used to create adjectives. It also means in possession of or full of. Incredulous means not full of belief.
Root - cred
This root word is cred meaning belief or believable. If something is credible, it is believable. Something that is incredible is not believable or hard to believe. Incredulous means not full of belief.
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"Home is where love resides, memories are created, friends always belong, laughter never ends
Answer: Their for the first one and They're for the second one.
