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Vilka [71]
3 years ago
9

What is 6.8 times 10 to the power of -3 in standard notation?

Mathematics
1 answer:
Studentka2010 [4]3 years ago
3 0
6.8 \times 10^{-3} =

= 6.8 \times \dfrac{1}{1000}

= 6.8 \times 0.001

= 0.0068


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What is the value of the expression f(-3) + 2f(-1) - f (4)<br><br> PLEASE HELP NO LINKS
Bas_tet [7]

Answer:

22

Step-by-step explanation:

Find f(-3) :

f(x) = x² + 2x for x ≤ -3

That means for those values of x, less than or equal to -3, this is the function.

So, f(-3) = (-3)² + 2(-3) = 9 - 6 = 3

Now, f(-1) :

From the given data, we see it is: f(x) = 2 (\frac{1}{3} )^{2x}

We take this because -1 lies between -3 and 4.

Now, f(-1) = 2 (\frac{1}{3} )^{2(-1)}

 => f = (-1) = 2(3)^{2} = 2 (9) = 18

For f(4) :

Clearly, the function is: f (x) = \frac{2x - 5}{x-7}

f (4) = \frac{2(4)-5}{4-7} = \frac{3}{-3} = -1

Therefore, <u>f(-3) + f(-1) - f(4) = 3 + 18 - (-1) = 3 + 18 + 1 = 22.</u>

5 0
3 years ago
What is the y-intercept of the line shown?
lys-0071 [83]
Simple.....

always remember the y-intercept is where your line hits the y-axis... or where it hits the vertical axis...

As we can see this line hits the y-axis at (0,3)-->> y-intercept=3

Thus, your answer.
6 0
3 years ago
Read 2 more answers
If 40% of a number is 80 what is 25% of that number?
olga2289 [7]

Answer:

25% of 200 is 50

Step-by-step explanation

40% of a number is 80

.40 * n = 80

Divide each side by .4

.40 n/.4 = 80/.4

n = 200

The number is 200

Now lets find 25 percent of that number

.25 * 200 = 50


7 0
3 years ago
.
Maksim231197 [3]

Answer:

D. x=1

Step-by-step explanation:

Image can be rewritten as 3x + 6 = 9.

Solve for x.

3x +6 = 9

Isolate x by subtracting 6 from both sides.

3x = 3

Get rid of the 3 by dividing by 3 on both sides.

x = 1

Hope this helped.

8 0
2 years ago
Due at 11:59 PLS HELP
Lelechka [254]
The answer is the last one
8 0
3 years ago
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