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3 years ago

2.077× (10 to the -4th power) In Scientific notation PLEASE HELP

1 answer:

4 0

If you are doing any scientific notation to the negative power the answer will be a decimal. In this case you will move the decimal point four places to the left.
The answer will be 0.0002077

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Express the sum in the simplest form.

olga nikolaevna [1]

The answer would be the third one because you cannot change the denominator and you can only add the numerators

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3 years ago

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4×7.12 in distribitive property

bija089 [108]

The answer will be 28.48

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3 years ago

The width of a rectangle measures (3v-3w) centimeters, and its length measures (5v-9w) centimeters. Which expression represents

Alex17521 [72]

Answer: The Perimeter of the rectangle, P= 16v −24w

Step-by-step explanation:

Perimeter of a rectangle = 2( L +W) = 2L + 2W

The width of a rectangle is given as (3v-3w) centimeters,

its length is given as (5v-9w) centimetres

The Perimeter,P will now be = 2L + 2W

P=2( 3v-3w) + 2( 5v-9w)

P=6v −6w + 10v - 18 w

adding like terms

P=6v + 10v −6w −18 w

P= 16v −24w

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2 years ago

Twenty gremlins and fifteen imps are at the Annual Mischief Convention. The imps have had a lot of in-fighting lately and refuse

harina [27]

Answer:

490

Step-by-step explanation:

Let us first count the handshakes between two gremlins. There are 20 gremlins, so there must be 20*19/2=190 handshakes between two gremlins, making sure to divide by two to avoid over-counting.

There are 15 imps that shake hands with each of the 20 gremlins, which makes 15* 20 = 300 handshakes between imps and gremlins.

Adding these up, you have $300 + 190 = 490 total handshakes.

Hope this helps!

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3 years ago

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James answered 14 items correctly on a 16-item quiz. what percent did he answer correctly?

Troyanec [42]

So,

I like to simplify a fraction first. This is what I do when I'm in a store trying to find the unit price.

$\frac{14}{16}$

Factor.
$\frac{2*7}{2*2*2*2}$

Cross out ones.
$\frac{7}{2*2*2}$

Multiply it out.
$\frac{7}{8}$

In my head, I remember that one-eighth is equal to 0.125.

So seven-eighths is equal to 0.125 times 7.
0.125 * 7 = 0.875

Convert to percent form.
0.875 --> 87.5%

James answered 87.5% of his quiz correctly.

I actually have the decimal equivalents for eighths in my head when I'm shopping. So once I get seven-eighths, I immediately know how much that is. I can also subtract 0.125 from 1.000 to get seven-eighths.

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3 years ago

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