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WARRIOR [948]
3 years ago
11

What is (2.3x10^-3)/(4.6x10^-7) written in scientific notation? Please show how you solved this.

Mathematics
1 answer:
lions [1.4K]3 years ago
5 0
(2.3*10^-3) / (4.6*10^-7)

(2.3*0.001) / (4.6*0.0000001)  *10^-3=0.001 & 10^-7=0.0000001*

(0.0023) / (0.00000046)   *2.3*0.001=0.0023 & 4.6*0.0000001=0.00000046*

5000  *0.0023/0.00000046*

So the answer is 5000
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B

Step-by-step explanation:

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What is m &lt; 8 if m &lt; 4 = 50° ? <br> A) 50°<br> B) 180° <br> C) 70°<br> D) 40°
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7 0
3 years ago
The area of a certain rectangle is 288 yd2. The perimeter is 68 yd. What are the dimensions of the rectangle?
arsen [322]

Answer:

The rectangle is 16*18

Step-by-step explanation:

The area of a rectangle is length * width and the perimeter is 2 times length * width

A = l*w

P = 2(l+w)

Replacing A and P

288 = l*w

68 = 2(l+w) => 34 = l+w => 34 - w = l

replacing l in the area

288 = (34 - w) w

w^2 - 34w + 288 = 0

(w - 16)(w - 18)

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8 0
3 years ago
Solve In (2x-1)=8
Verdich [7]
I believe you are missing some information here as the answer to the question as it is written is 4.5
7 0
3 years ago
Help with math please.
lys-0071 [83]
Hello,

The rate of change is the slope (rise/run, y/x). To find that, we use the equation (y2-y1) over (x2-x1). It means take the second "y" and subtract it from the first "y" and the same to "x". If I plug in the numbers, it would be (3-6) over (5-4), and after you subtract, the answer simplifies to: -3/ 1 which is -3. Yay! We got the slope (rate of change) done.

Now let's find the y-intercept by using the formula of point-slope form, 
y-y1= m (slope) (x-x1). This is saying you "y" is subtracted from the first 
"y" of the points which equals the slope (m) times the quantity of "x" subtracted by the first "x" of the points. 

Let's plug the numbers in: y-6 = -3 (x-4). Let's distribute -3 to the parenthesis, and after that it should simplify to: y-6 = -3x + 12. To get "y" by itself, add 6 to both sides: y = -3x +18. We have finally found the slope-intercept equation for those two points (4,6) and (5,3). To then find the y-intercept in this equation, it would be the 18, because -3 is the slope, so that makes 18 the y-intercept.

In conclusion, the rate of change is -3 and the y-intercept is 18. 

I hope this helps!

May
3 0
3 years ago
Read 2 more answers
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