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Dominik [7]
3 years ago
9

4.31 to 1 significant figure

Mathematics
2 answers:
Tresset [83]3 years ago
8 0
The answer is 4 1 sf means only one number other the zero So 4.31 means only one number other than zero, so, 4.31. '3' rounds down as does '1'. So the answer is 4.00
Ahat [919]3 years ago
8 0

The correct answer is: 4

Explanation:

In order to round to 1 significant figure, ALWAYS REMEMBER, we will look at the first digit of the number, and make sure that it is not zero (zero case will be discussed at the end, as in this particular example zero is not the first digit).

In 4.31, the first digit is at unit place is 4. Now you have to decide whether 4.31 is closer to 4 or 5. Indeed, 4.31 is closer to 4. Therefore, 4.31 is rounded off to one significant figure as 4.

(EXTRA INFORMATION) Zero case:

If we have the following number: 0.951. Now the first digit is 0, but as there is a decimal point after that, therefore, it is insignificant. We will move on to the first digit after the decimal point, which is 9 in this case. Now, we will look at the next number. In this case it is 5, therefore, 0.951 is closer to 1.0 after rounding off. Hence, in this case the answer will be 1.0.

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If b is the midpoint of ac and ac = 8x-20, find bc
KengaRu [80]

Answer:

BC=4x-10

Step-by-step explanation:

B is the Mid point of AC . hence the length of  BC will be half of AB

AC = 8x-20

Hence AB=BC = \frac{8x-20}{2}

BC=4x-10

7 0
3 years ago
Which system of equations could be graphed to solve the equation below?
Andrej [43]

Answer:

y 1 = StartFraction log x Over log 0.5 EndFraction, y 2 = StartFraction log 2 Over log 3 EndFraction + x

Step-by-step explanation:

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3 years ago
What is the perimeter of the parallelogram shown below? And how did you get that answer.
romanna [79]

The answer is 194

Explanation:

A parallelogram is a tilted rectangle and possess all the features of rectangle except it's symetry

Opposite sides of a parallelogram are equal in length

So if One side is 48 then the opposite length the is also 48 and vice versa, Same for the 49 too

My calculations were 49+49+48+48=

OR

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4 0
3 years ago
Find the value of X and prove the following​
natali 33 [55]

The value of the variable <em>x</em> can be determined using the circle theorem to

determine the angle formed by <em>x</em>.

The correct responses are;

  • (1) x = <u>30°</u>
  • (2) x = <u>100°</u>
  • (3) x = <u>60°</u>

Reasons:

(1) From circle theorem, we have;

  • Equal chords subtends equal arcs and vice versa
  • Equal chords subtend equal angles at the center of a circle

Therefore;

Angle subtended by \displaystyle \widehat {AB} at center = Angle subtended by \widehat {BC} at the center;

  • Angle at the center = 2 × Angle at the circumference

Therefore;

Angle subtended by \displaystyle \widehat {AB} at the circumference = Angle subtended by \mathbf{\widehat {BC}} at the circumference

Which gives;

  • x = <u>30°</u>

(2) \displaystyle \widehat {AB} = \mathbf{\widehat {CD}} given

Angle subtended by arc \widehat {CD} at the center = x

Equal arcs subtend equal angles at the center of a circle.

Therefore;

Angle subtended by arc \mathbf{\widehat {AB}} at the center = x

Angle at center = 2 × angle at circumference

Therefore;

x = 2 × 50° = 100°

x = <u>100°</u>

(3) \displaystyle \widehat {AC} = \mathbf{ 3 \times \widehat {AB}} given

By definition, we have;

Angle subtended by \widehat {AC} at the center = 3 × Angle subtended by \widehat {AB} at the center

According to circle theorem, we have;

Angle at the center = 2 × Angle at the circumference

Let <em>y</em> represent the angle subtended at the circumference by \widehat {AB}, we have;

y = 20°

\widehat {AB} = 2·y

\widehat {AC} = 3 × \widehat {AB} = 3 × 2·y = 6·y

Therefore;

\widehat {AC} = 6 × 20° = 120°

\widehat {AC} = 120°

\widehat {AC} = 2·x

Therefore;

2·x = 120°

\displaystyle x = \frac{120^{\circ}}{2} = \mathbf{ 60^{\circ}}

x = <u>60°</u>

Learn more circle theorems here:

brainly.com/question/16879446

5 0
2 years ago
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pychu [463]
I think n=4 is the answer
6 0
3 years ago
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