3 years ago

MATH PROBLEMS URGENT PLEAASE PRESS

Mathematics

1 answer:

Len [333]3 years ago

5 0

Answer:

t+20=60 t=40

Step-by-step explanation:

t+20=60 subtract 20 from both sides

t=60-20 simplify

t=40

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The number 1953125 is equal to 5^9. explain how the information above informs you that 1953125 is not a square number

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If 1953125 is a square number, then $1953125=n^2,~n\in\mathbb{N}$

By what's given, $1953125=5^9\Rightarrow n^2=5^9\Rightarrow n=5^{4.5}=625\sqrt{5}$

But $n=625\sqrt{5} \notin\mathbb{N}$ , therefore, our assumption that 1953125 is a square number is wrong.

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Americans who are 65 years of age or older make up 13.2% of the total population. If there at 30.3 million american in this age

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Given:

Americans who are 65 years of age or older make up 13.2% of the total population.

Required:

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$\begin{gathered} \frac{13.2}{100}\text{ }\times\text{ x = 30.3} \\ x\text{ = }\frac{30.3\text{ }\times\text{ 100}}{13.2} \\ x\text{ = 229.55 billion} \end{gathered}$

Answer:

Thus the total population of u.s is 229.55 billion.

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