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-waste 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

14,200,000

10,700,000
----------------
24,900,000
= 2.49x10^7

or,

1.42x10^7 + 1.07x10^7 = 2.49x10^7

To find the total e-waste generated over the two years, we need to add the amounts of e-waste generated in each year. In this case, the amounts are 14,200,000 tons and 10,700,000 tons.

To add these numbers, we simply add the digits in each place value together. Starting from the rightmost place value, we have:

0 + 0 = 0 (in the ones place)
0 + 0 = 0 (in the tens place)
0 + 0 = 0 (in the hundreds place)
0 + 7 = 7 (in the thousands place)
0 + 0 = 0 (in the ten thousands place)
0 + 1 = 1 (in the hundred thousands place)
4 + 4 = 8 (in the millions place)
1 + 1 = 2 (in the ten millions place)

So the total e-waste generated over the two years is 24,900,000 tons.

To express this number in scientific notation, we need to move the decimal point so that there is only one non-zero digit to the left of the decimal point. In this case, we will move the decimal point one place to the left, and we will have 2.49 × 10^7 tons.

Therefore, the correct answer is 2.49 × 10^7 tons.

I think you'd do well to review your scientific notation. Any explanation I give here will just be a duplication of what you have already (I hope) read.

9 ⋅ 1019

9 ⋅ 1019
9 ⋅ 1019
9 ⋅ 1019
9 ⋅ 1019
9 ⋅ 1019
9 ⋅ 1019
9 ⋅ 1019
9 ⋅ 1019
9 ⋅ 1019
9 ⋅ 1019
9 ⋅ 1019
9 ⋅ 1019
9 ⋅ 1019
9 ⋅ 1019

whats the answer can you explain