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goldfiish [28.3K]

2 years ago

14

0.0008235 in scientific notation

1 answer:

patriot [66]2 years ago

3 0

Salutations!

When we are moving towards the right, the power will always be negative. If we are moving towards the left the power will always be positive. So the question shows the decimal point after zero.. which means we have to move the point infront of 8. We are moving to the right side, and therefore the power would be negative.

$8.235*10^{-4}$

Hope I helped (:

Have a great day!

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goldfiish [28.3K]

Answer:

f(-7)=0.

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Step-by-step explanation:

$f(x)=\frac{x+7}{x^2-9}$ is the given function.

We are asked to find:

$f(-7)$

$f(2)$

$f(3)$ .

f(-7) means to replace x in the expression called f with -7:

Evaluate $\frac{x+7}{x^2-9}$ at $x=-7$

$\frac{(-7)+7}{(-7)^2-9}$

$\frac{0}{49-9}$

$\frac{0}{40}$

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So f(-7)=0.

f(2) means to replace x in the expression called f with 2:

Evaluate $\frac{x+7}{x^2-9}$ at $x=2$

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$\frac{9}{4-9}$

$\frac{9}{-5}$

$\frac{-9}{5}$

So f(2)=-9/5

f(3) means to replace x in the expression called f with 3:

Evaluate $\frac{x+7}{x^2-9}$ at $x=3$

$\frac{3+7}{3^2-9}$

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$\frac{10}{0}$

Division by 0 is not allowed so 3 is not in the domain of our function.

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