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2 years ago

B) Write 2.456 correct to 2 significant figures

Mathematics

2 answers:

Romashka-Z-Leto [24]2 years ago

5 0

Answer:

it should be 245.6

Step-by-step explanation:

since it was 2decimal place we move the point 2times forward and it becomes 245.6

mylen [45]2 years ago

3 0

Answer:

2.5

Step-by-step explanation:

When the number is rounded to two significant figures, the left-most digit will be non-zero, and there will be one more significant digit to the right of it.

Here, we need to round the number to 2 significant figures. Find the third digit from the left. If it is 5 or more (it is), then increase the second digit from the left before removing all digits to the right of it.

2.456 rounds to 2.5

<em>Additional comment</em>

Leading zeros are never significant. Trailing zeros are only significant if the number has a decimal point. Any digits between leading and trailing zeros are significant. All mantissa digits of a number in scientific notation are significant.

When rounding to a specific number of significant digits, as here, the significant digits are counted from the left.

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Allisa [31]

Answer:

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Step-by-step explanation:

Let X equal the remaining time she needs to practice.

You would have 2x

The combined total needs to be 6 hours or greater.

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Now you have: three and one fourth + 2x

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I hope this helps you :)

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4 years ago

Consider the graph of the line y = x – 4 and the point (−4, 2).

Hitman42 [59]

Answer:

a. The slope of a line parallel to the given line is 1

b. A point on the line parallel to the given line, passing through (−4, 2), is (1,7)

c. The slope of the line perpendicular to the given line is -1

d. A point on the line perpendicular to the given line, passing through (−4, 2), is (3,-5)

Step-by-step explanation:

The equation of the line in Slope-intercept form is:

$y=mx+b$

Where m is the slope and b is the y-intercept.

a. For the line $y = x - 4$

You can identify that:

$m=1$

By definition, two lines are parallel if they have the same slope. Then, the slope of a line parallel to the given line is:

$m=1$

b. The equation of the line in Point-slope form is:

$y -y_1 = m(x - x_1)$

Where m is the slope and ( $x_1,y_1$ ) is a point of the line.

Given the point (-4,2), substitute this point and the slope of the line into the equation:

$y -2 = (x +4)$

Give a value to "x", substitute it into this equation and solve for "y":

For $x=1$ :

$y -2 = (1 +4)$

$y= 5+2$

$y= 7$

Then, you get the point (1,7)

c. The slopes of perpendicular lines are negative reciprocals, then the slope of a line perpendicular to the given line is:

$m=-\frac{1}{1}\\\\m=-1$

d. Given the point (-4,2), substitute this point and the slope of the line into the equation:

$y -2 = -1(x +4)$

$y -2 = -(x +4)$

Give a value to "x", substitute it into this equation and solve for "y":

For $x=3$ :

$y -2 = -(3 +4)$

$y= -7+2$

$y= -5$

Then, you get the point (3,-5)

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mihalych1998 [28]

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Step-by-step explanation:

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3 years ago

a rectangular section of land has a length of 5•10^3 meters and a width of 6•10^2 meters. what is the area of land in square met

monitta

A = lw
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4 0

3 years ago

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Dmitry [639]

The answer to your problem (or what i got) was 34u^2(34units squared)

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4 years ago