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2 years ago

15

Simplify: square root of 81+18

align="absmiddle" class="latex-formula">+7

1 answer:

Lemur [1.5K]2 years ago

5 0

$\sqrt{81 \: + \: 18 \sqrt{7} \: + \: 7}$

Factor the indicated expression:

$\sqrt{(9 \: + \: \sqrt{7} ) ^{2} }$

Simplified the index, the root and also the exponent using the number 2.

$\boxed{ \bold{9 \: + \: \sqrt{7} }}$

<h3><em><u>MissSpanish</u></em> </h3>

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Answer:

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Step-by-step explanation:

Continuous exponential growth formula:

$P(t)=Pe^{rt}$

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Given that,

Growth rate of country A (r)= 4.9% per year=0.049 per year.

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Land area of country area= 14,000,000,000 square yards.

There will be one person on one square yard of land.

So, there will be 14,000,000,000 person for 14,000,000,000 square yard of land in country A.

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$\Rightarrow e^{0.049t}=\frac{ 14,000,000,000}{ 151,000}$

Taking ln both sides

$\Rightarrow ln|e^{0.049t}|=ln|\frac{ 14,000,000,000}{ 151,000}|$

$\Rightarrow {0.049t}=ln|\frac{ 14,000,000,000}{ 151,000}|$

$\Rightarrow t}=\frac{ln|\frac{ 14,000,000,000}{ 151,000}|}{0.049}$

$\Rightarrow t}=1,892,147.588$ years

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3 years ago

Let A = R−{0}, the set of all nonzero real numbers, and consider the following relations on A × A. Decide in each case whether R

andre [41]

Answer:

Step-by-step explanation:

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