Answer:
1. 516 ppm; 2. 561 ppm
Step-by-step explanation:
1. CO₂ increase at old rate
Time = 2100 - 2010 = 90 years
Increase in CO₂ = 90 yr × (1.4 ppm/1 yr) = 126 ppm
CO₂ in 2010 = 390 + 126 = 516 ppm
At the old rate, the CO₂ concentration in 2100 will be 516 ppm.
2. CO₂ increase at new rate
Time = 2100 - 2010 = 90 years
Increase in CO₂ = 90 yr × (1.9 ppm/1 yr) = 171 ppm
CO₂ in 2010 = 390 + 171 = 561 ppm
At the new rate, the CO₂ concentration in 2100 will be 561 ppm.
Answer:
X= 8
Y= 130
(8, 130)
Step-by-step explanation:
I used a graphing calculator to see where the two equations intersected.
Hope this helped :)
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Answer:
Option B (p−2) dollars
Step-by-step explanation:
we know that
1) Paul bought 4 packs of gum that contained p pieces in each pack
The total pieces of gum is equal to multiply the number of packs by the number of pieces in each pack
so

2) He kept 8 pieces for himself
To find out the remaining pieces, subtract 8 from the total of pieces
so

3) He sold each of the remaining pieces for $0.25.
To find out how much money he got for selling the gum, multiply the remaining pieces by $0.25.
so

apply distributive property

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