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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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rewona [7]

Answer:

(A) A=\left[\begin{array}{ccc}10&20&40\end{array}\right]

(B) B=\left[\begin{array}{ccc}11&22&44\end{array}\right]

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Step-by-step explanation:

The manager ordered 10 lb of​ tomatoes, 20 lb of​ zucchini, and 40 lb of onions from a local farmer one week.

(A)

Matrix <em>A</em> represents the amount of each item ordered. ​It is 1 × 3 matrix.

Then matrix <em>A</em> is:

A=\left[\begin{array}{ccc}10&20&40\end{array}\right]

(B)

Next week the manager increases the order of all the products by 10%.

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Zucchini =20\times [1+\frac{10}{100}]=20\times1.10=22

Onions =40\times [1+\frac{10}{100}]=40\times1.10=44

Th matrix <em>B</em> represents the amount of each order for the next week. Then matrix <em>B</em> is:

B=\left[\begin{array}{ccc}11&22&44\end{array}\right]

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Add the two matrix <em>A</em> and <em>B</em> as follows:

A+B=\left[\begin{array}{ccc}10&20&40\end{array}\right]+\left[\begin{array}{ccc}11&22&44\end{array}\right]\\=\left[\begin{array}{ccc}(10+11)&(20+22)&(40+44)\end{array}\right]\\=\left[\begin{array}{ccc}21&42&84\end{array}\right]

The entries of the matrix (<em>A</em> + <em>B</em>) represent the amount of tomatoes, zucchini and onions ordered for two weeks.

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g divided by 2  is equal to 4 .

We could represent that with the equation :

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