Answer:
D
Explanation:
If these three substances are mixed together with the required proportion, it would yield concrete all the time. Thus, the result is replicable, or repeatable, in future experiments.
The result is not from an observation of the natural world because the three substances were mixed together by man in a lab.
Which one do u need help with??
That statement is true.
The intention of excluding the children is to ensure that they wouldn't be exposed to any negative effects from the alteration made during the research.
But an argument could be made that if we truly want to collect the data about a certain effect<span> therapeutic agents in children, including them in research might be necessary.
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Answer:
The first U.S. national government began under the Articles of Confederation, adopted in 1781. This document said nothing about slavery. It left the power to regulate slavery, as well as most powers, to the individual states. After their experience with the British, the colonists distrusted a strong central government.
Explanation:
Public speaking, I guess.
