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3 years ago

Use the rules for significant figures to find the answer to the addition problem 21.4 + 15 + 17.17 + 4.003

Mathematics

1 answer:

Whitepunk [10]3 years ago

7 0

Given : The addition 21.4 + 15 + 17.17 + 4.003 by the rules for significant figures.

Solution: According to given numbers, let us count number of significant figures in each of the given numbers.

21.4 has three significant figures.

15 has two significant figures.

17.17 has four significant figures.

4.003 has four significant figures.

We have to round the final answer to the nearest tens place because 15 has only accurate to the ones place.

We can see that other numbers are accurate to the tenths, hundredths and thousandths places, respectively.

Let us add them as usually first,

21.4 + 15 + 17.17 + 4.003.

It gives 57.573.

Now, we need to round it to the ones place.

We get 58 as the final answer.

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Step-by-step explanation:

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f (x) = 3/8 (4) ^ x

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3 years ago

How do you expand (x-10)(x-10)

denpristay [2]

1 Answer
1.multiply the First terms. x⋅x=x2.
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iren2701 [21]

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3 years ago

What is the slope of line a? <br><br>

emmainna [20.7K]

<h3>Answer: -1/4 (choice C)</h3>

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Explanation:

Start at the point (0,1). This is the y intercept, which is where the graph crosses the y axis.

Then move down 1 and over to the right 4 spaces. We arrive at (4,0) which is the x intercept.

The process of "down 1, over to the right 4" can be thought of like this

rise/run = -1/4

rise = -1

run = 4

A rise of -1 indicates we go down 1 unit

The run of 4 means we move to the right 4 units

So that's why slope = rise/run = -1/4

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Here's another approach using the slope formula:

m = (y2-y1)/(x2-x1)

m = (0-1)/(4-0)

m = -1/4

I used the two points (0,1) and (4,0) as (x1,y1) and (x2,y2) respectively. This formula basically says "subtract the y coordinates, subtract the x coordinates in the same order, then divide the differences y over x".

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Side note: The line moving downhill, as we read from left to right, indicates a negative slope.

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