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3 years ago

6

Suppose you are asked to find 91,321,972×0.007004. Doing a quick estimate by rounding the numbers in scientific notation, what v

alue would you expect the answer to be close to? (If you need a review of the estimation technique, watch the video Scientific Notation, Part 4.)

1 answer:

Finger [1]3 years ago

6 0

Answer: $63\times10^4$

we need to estimate the product of two numbers by writing them in scientific notation and rounding them off.

In scientific notation, number 91321972 can be written as $9.1321972\times10^7$

If we round this off to 1 significant figure, it would be:

$9\times10^7$

In scientific notation, number 0.007004 can be written as $7.004\times10^{-3}$

If we round this off to 1 significant figure, it would be:

$7\times10^{-3}$

Product of these two numbers:

$9\times10^7 \times 7\times10^{-3}=9\times7\times10^{7-3}=63\times10^{4}$

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A transparent oil with index of refraction 1.28 spills on the surface of water (index of refraction 1.33), producing a maximum o

Ad libitum [116K]

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3 years ago

Holding onto a tow rope moving parallel to a frictionless ski slope, a 70.1 kg skier is pulled up the slope, which is at an angl

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Answer:

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4 years ago

A dog is walking at 2m/s and then begins to run at a speed of 6m/s. What is his acceleration if his total travel time is 2 secon

fiasKO [112]

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3 years ago