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alexira [117]
3 years ago
6

The amounts of e-waste generated in a region during two years were 14,200,000 tons and 10,700,000 tons. What was the total e-was

te generated over these two years in the region, expressed in scientific notation? 2.49 ⋅ 107 tons 2.49 ⋅ 1014 tons 24.9 ⋅ 107 tons 24.9 ⋅ 1014 tons
Mathematics
2 answers:
iVinArrow [24]3 years ago
7 0

Answer:

Option A

Step-by-step explanation:

The amount of e waste generated in a region during two  years was 14,200,000 tons and 10,700,000 tons.

So total e waste generated over these two years will be

= 14200000 + 10700000

= 24,900,000

Now we have to express the total amount in the scientific notation.

24900000 = 2.49 × 10000000

                  = 2.49 × 10⁷

Option A is the correct answer.

den301095 [7]3 years ago
6 0

1.42·10⁷ tons + 1.07·10⁷ tons = 2.49·10⁷ tons . . . . matches the first choice

_____

The distributive property applies.

1.42·10⁷ tons + 1.07·10⁷ tons = (1.42 + 1.07)·10⁷ tons = 2.49·10⁷ tons

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When asked to rewrite the expression (x3 + 2x? – x)-(-x3 + 2x2 + 6), Denise made a mistake. She did not get the correct answer,
DanielleElmas [232]

Answer:

She rewrote the problem without parentheses: x3+ 2x2 - x + x3 – 2x2 +6

Step-by-step explanation:

It looks like she didn't fully distribute the -

(x3 + 2x2 - x)-(-x3 + 2x2 + 6) :Original

x3+ 2x2 - x + x3 – 2x2 +6 :Changed

~

(x3 + 2x2 - x)-(-x3 + 2x2 + 6)

x3 + 2x2 - x + x3 - 2x2 - 6

x3 + x3 + 2x2 - 2x2 -x - 6

2x3-x-6

I hope this helps ^-^

3 0
3 years ago
a father is twice as old as his son. 20 yrs ago the father was four times as old as his son. find their present ages
Roman55 [17]

Answer:

son's present age = 30

father's present age=60

Step-by-step explanation:

his son's present age = x years

his father's present age = 2x years

before 20 years his son's age=(x-20) years

before 20 years father's age=(2x-20) years4(x-20)=(2x-20)

4x-80=2x-20

4x-2x=80-20

2x=60

x=30

5 0
2 years ago
Please help!!!!!!!!!!
Sergeu [11.5K]
1, 3, and 5 would be my best guesses but I’m not 100 percent sure
7 0
3 years ago
. If Owen buys a trampoline for $350.60, and is charged 7% sales tax, how much sales tax does he pay?
LuckyWell [14K]
$24.54 I hope this is the right answer
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3 years ago
Your bank statement indicates that you are overdrawn on your checking account by $250. How much must you deposit to bring the ch
andrey2020 [161]

Answer:

you would have to deposit $432.

Step-by-step explanation:

it's actually pretty simple. all you have to do is add 182+250 which equals 432. if you want to check your work, add 432 to -250 and you should get 182.

3 0
3 years ago
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