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Brilliant_brown [7]
3 years ago
13

A jet flies at a rate of 1.3x10^3 feet per hour . Written in scientific notation which is the best estimate of how many feet the

jet will travel in 2.8x10^3 hours ?
Mathematics
1 answer:
vichka [17]3 years ago
5 0

Answer:

3 * 10^6 if the answer is 3.64 * 10^6, you really ought to argue the meaning of estimate with your instructor.

Step-by-step explanation:

This is a very valuable question. Put your calculator away when you answer it. Using a calculator is sort of cheating.

1.3 * 10^3 roughly is roughly 1 * 10^3

2.8*10^3 hours is roughly 3 * 10^3

Forget the powers for now and just work with the 1 and 3

1*3 equals 3.

10^3 * 10^3 = 10^6 when the base of two numbers is the same (10 in this case) then the powers are added.

10^(3 + 3) = 10^6

So the answer is roughly 3*10^6

Now you can take out your calculator and get the answer.

1.3*10^3 * 2.8 * 10^3 = 3.64 * 10 ^ 6

Notice that the estimate (done in my head) is close enough to tell you what the answer should be. On a test, that's a very handy skill.

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Answer:

He paid $9 twelve times

12× 2= 24 days

Step-by-step explanation:

1st day = $16.60

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5th day=$ 9

Yuri pays : 124.60

124.60-16.60

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After paying the first day he paid 108.00

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2 years ago
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borishaifa [10]

Find the slope of the line passing throught the points (2, 2) and (4, 3).

The formula of a slope:

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Substitute:

m=\dfrac{3-2}{4-2}=\dfrac{1}{2}

If the point (x, -1) lie on the same line, then the slope of line passing through the points (2, 2) and (x, -1) the same:

Substitute:

m=\dfrac{-1-2}{x-2}=\dfrac{-3}{x-2}

We have the equation:

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So x + y = 45, and 4x + 5y = 195. Get y by itself. Subtract x from both sides in the first equation to get y = 45 -x, and subtract 4x from the second equation to get 5y = 195 - 4x. Divide by 5 to both sides to get y = 39 - 4/5x. 39 - 4/5x = 45 - x. Add x to both sides to get 39 - 1/5x = 45. Subtract 39 from both sides to get -1/5x = 6. Divide by -1/5 to get x = -30, or 30. In the first equation, do 30 + y = 45. Subtract 30 from both sides to get y = 15. Check. 4(30) + 15(5) = 195, or 120 + 75 = 195.


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Answer:distributive

Step-by-step explanation:

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