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3 years ago

Is this Scientific Notation? 0.4 x 10^25

Mathematics

2 answers:

Mnenie [13.5K]3 years ago

8 0

Yes that is scientific notation

Alex3 years ago

7 0

Yes, that is scientific notation... and to solve it, you would move the decimal 25 places to the right and your zeros to put it in standard notation.

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please help! functions and relations. f(x)= square root of x-4. find the inverse of f(x) and it’s domain.

likoan [24]

ANSWER:

$\:D.\text{ }f^{-1}\left(x\right)=\left(x+4\right)^2;x\ge-4$

STEP-BY-STEP EXPLANATION:

We have the following equation:

$f(x)=\sqrt{x}-4$

The inverse is the following (we calculate it by replacing f(x) by x and x by f(x)):

$\begin{gathered} x=\sqrt{f^{-1}(x)}-4 \\ \\ \sqrt{f^{-1}(x)}=x+4 \\ \\ f^{-1}(x)=(x+4)^2 \end{gathered}$

The domain would be the range of the original equation, and it would be the range of values that f(x) could take, which was from -4 to positive infinity, that is, f(x) ≥ -4.

Therefore, the domain is x ≥ -4.

So the correct answer is D.

$\:f^{-1}\left(x\right)=\left(x+4\right)^2;x\ge -4$

4 0

1 year ago

A bookstore pays $12.75 for hardcover books and charges $29.95. What is the maximum percent of discount that it can offer while

Anna [14]

9514 1404 393

Answer:

A. 40.7%

Step-by-step explanation:

The selling price for a $5 profit will be ...

$12.75 +5.00 = $17.75

From $29.95, this represents a change of ...

(17.75 -29.95)/29.95 × 100%

= -12.20/29.95 × 100% ≈ -40.7346%

The bookstore can offer a maximum discount of about 40.7%.

4 0

3 years ago

Read 2 more answers

PLEASE HELP WILL MARK AS BRAINLEST

laiz [17]

It is 16 because 3x16=48 and 4x16=64!

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3 years ago

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2x - 4y + 7x - 87<br> Helppp

xxTIMURxx [149]

Answer:

9x-4y-87

Step-by-step explanation:

2x-4y+7x-87

9x-4y-87

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3 years ago

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Your friend attempted to factor an expression as shown. Find the error in your friends work. Then factor the expression correctl

loris [4]

Answer:

Third step is incorrect. The correct factored form is (x-1)(2x-5).

Step-by-step explanation:

The given expression is

$2x^2-7x+5$

We need to find the factored form of this expression.

Step 1: Given

$2x^2-7x+5$

Step 2: Splitting the middle term method, the middle term can be written as (-5x-2x).

$2x^2-5x-2x+5$

$(2x^2-5x)+(-2x+5)$

Step 3: Taking out common factors from each parenthesis.

$x(2x-5)-1(2x-5)$

Step 4: Taking out common factors.

$(x-1)(2x-5)$

Therefore, the third step is incorrect. The correct factored form is (x-1)(2x-5).

3 0

3 years ago