Ineed , i don't quite get this. this assignment is worth a lot so ! , just look at the image and tell me how you did it.

  1.98•10¹⁰

To find the total number of messages sent in a month, multiply the number of teenagers by the number of messages each sent. That product is ...

  22,000,000 × 900 = 19,800,000,000

To provide the answer in the requested form, you must convert this number to scientific notation. That means you express the number as a product of a mantissa and a power of 10.

The mantissa is the leading significant digits, with the first one written to the left of the decimal point. In this number, the mantissa is 1.98.

The power of 10 used is the number that must multiply the mantissa so that the result is 19,800,000,000. In other words, you want to express the number 10 billion as a power of 10:

  19,800,000,000 = 1.98×10,000,000,000

Since you're familiar with powers of 10, you know the exponent of 10 is the number of zeros the number has: 10. So, this number is ...

  1.98•10¹⁰

In plain text, we use a caret (^) to signify an exponent (and an asterisk for multiplication), so we would write the number as

  1.98*10^10.

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Comment on the attachment

Your scientific or graphing calculator has a mode for displaying numbers in scientific notation. You can use that to find or check your answer.

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Comment on scientific notation

Scientific notation is closely related to place value. Since you understand our place value number system, you know that the value of each place in a decimal number is 10 times that of the place to its right and 1/10 that of the place to its left. In "expanded form", the number 1234.56 can be written as ...

  1234.56 = 1000 +200 +30 +4 +0.5 +0.06

or as ...

  1234.56 = 1·1000 +2·100 +3·10 +4·1 +5·0.1 +6·0.01

and using powers of 10 as ...

  1234.56 = 1·10³ +2·10² +3·10¹ +4·10⁰ +5·10⁻¹ +6·10⁻²

As you might guess, the corresponding powers of 10 continue to increase for digits to the left of those in this number, and they continue to decrease for decimal fraction digits to the right of those in this number. The power of 10 in this expanded form is exactly the same power of 10 that is used in scientific notation when the leading digit of the number is in the corresponding decimal place. That is, this number would be written in scientific notation as 1.23456·10³.

points are handed out whenever you post answers.

brainliest answers are handed out by the person asking the question, so whether your answer is picked depends entirely on whether the asker bothers to pick

if you're asking about your rank, it depends on having a certain number of points and a certain number of brainliest answers. for example, at the time of this writing, i have 44338 points out of 15000 needed for the next (nearly triple the requirement! ) but i only have 24 out of 50 required brainliest answers. this number decays, meaning after a certain amount of time (i think about a month), the total number of brainliest answers you've earned doesn't count toward this total. (i've been stuck at the same rank for a long

the lesson to learn here is that you shouldn't worry about points or rank. chances are, no matter how good an answer you may provide, your efforts will go mostly unnoticed unless you focus on the newest/most active questions that get posted.

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation: