A scuba diver swam 96 feet beneath the surface of the lake . He then climbs up 49 feet. What is his depth now?

2 answers:

7 0

If this question is as simple as it seems all you would have to do is subtract. If he is down 96 feet then goes up 49 feet you would do 96-49.

The answer is 47 feet.

I hope this helps! Let me know if this is right.

iVinArrow [24]3 years ago

3 0

Answer:

47 feet below the surface of the lake.

Step-by-step explanation:

We have been given a scuba diver swam 96 feet beneath the surface of the lake.

Since scuba diver swam 96 feet beneath the surface of the lake, so his elevation would be negative 96 feet.

The diver then climbs up 49 feet, so his elevation would be positive 49 feet.

$\text{Diver's final elevation}=-96\text{ ft}+49\text{ ft}$

$\text{Diver's final elevation}=-47\text{ ft}$

Since diver's elevation is negative 47 feet, therefore, diver is 47 feet below the surface of the lake.

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Can someone explain scientific notation to me? And also another question. Is 9.725 x 10^6 a scientific notation? What about 9.72

ELEN [110]

Both of those values are in scientific notation

Scientific notation is when we have numbers of the form $a \times 10^b$ where $0 \le a < 10$ and b is an integer.

Both 9.725 and 9.7250 are inside the inequality mentioned above.

Scientific notation is used to help describe very large numbers, or very small numbers, depending on context.

---------------

If you wanted to convert from scientific notation to standard notation, then you'll move the decimal point based on what the exponent is. The positive 6 means we move the decimal point 6 places to the right.

We go from 9.725 to 9,725,000 which is about 9.7 million

In other words, $9.725 \times 10^6 = 9,725,000$

As another example, $1.23 \times 10^{11} = 123,000,000,000 = \text{123 billion}$ since we start at 1.23 and move the decimal point 11 spots to the right to arrive at 123,000,000 aka 123 billion.