What is (3.5 x 10 to the fourth) to the secondwhen written in scientific notation with four significant digits?
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then it is squared so 1,225,000,000 but to four significant digits it would be 1225 times 10^6 or on a online test 1225e+06
note:
3.5 = 3.5^1
(3.5 x 10^4)^2
(3.5^1*2 x 10^(4*2))
(3.5^2 x 10^8)
12.25 x 10^8
1.225 x 10^9
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Answer: and
.
Step-by-step explanation:
Since, we have number with help of which we have to find a square.
If we divide 9 by 9 then we will obtain 1 which is itself a square.
That is,
Now, If we multiply 9 by itself we obtain 81, which is the square of 9.
That is,
Note: We can also make other squares by using number 9.
9x9=81.
keep in mind that a square root is any number multiplied by itself to get another number
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The center of the circle is (2, - 1) and the radius is 6 units.
What are the types of equations of a circle?
The equation for a circle has the generic form x² + y² + 2gx + 2fy + c = 0.
The standard equation of a circle is x² + y² = r².
The polar form of the equation of the circle is (rcosθ)² + (rsinθ)² = p².
Given, The equation of a circle is x² + y² - 4x + 2y - 31 = 0.
We know, In x² + y² + 2gx + 2fy + c = 0, The center of the circle is,
(- g, - f) and radius is .
Therefore, 2gx = - 4x and 2fy = 2y.
2g = - 4 and 2f = 2.
g = - 2 and f = 1.
- g = 2 and - f = - 1.
So, The center is (2, - 1).
And the radius is, .
= .
= .
= 6 units.
learn more about circles here :
#SPJ3
Answer:
centre = (2, - 1), radius = 6
Step-by-step explanation:
Rearrange the equation by placing the x and y terms together and adding 31 to both sides
Given
x² + y² - 4x + 2y - 31 = 0, then
x² - 4x + y² + 2y = 31
Use the method of completing the square
add ( half the coefficient of the x/y term )² to both sides
x² + 2(- 2)x + 4 + y² + 2(1)y + 1 = 31 + 4 + 1
(x - 2)² + (y + 1)² = 36
The equation of a circle in standard form is
(x - h)² + (y - k)² = r²
where (h, k) are the coordinates of the centre and r the radius
compare to (x - 2)² + (y + 1)² = 36, then
centre = (2, - 1) and r = = 6