First do 6×8=48, then just add the 0's to the end to get 480,000
!) $18,000
<span>2) 1000 + 425(48) = $21,400 </span>
<span>3) 21,400 - 18,000 = $3400 </span>
<span>4) $23,500 </span>
<span>5) 2000 + 60(425) = $27,500 </span>
<span>6) 27,500 - 23,500 = $4000</span>
1/2 * 2/2 = 2/4 which is not 2/7
2/1 * 7/7 = 14/7 which is not 7/14
1/2 * 7/7 = 7/14 which is 7/14 yes
2/1 * 7/7 = 14/7 which is not 14/21 no
Choice C
You can change the form of the number to scientific notation before or after you do the addition. Here, we see the sum will be less than 100 million tons, so we can convert to scientific notation before we do the addition without requiring extra steps. The total waste is the sum of the amounts of waste in the two years.
... 3.75×10⁷ + 3.04×10⁷ = (3.75 +3.04)×10⁷ = 6.79×10⁷ . . . tons
