a=2+6t, b=10+2t
a=b when
2+6t=10+2t subtract 2t from both sides
2+4t=10 subtract 2 from both sides
4t=8 divide both sides by 4
t=2
Thus, they will have the same amount of snowfall after two hours
hope i helped
To find the percent change over time, use the following formula: PR = Percent Rate, VPresent = Present or Future Value, VPast = Past or Present Value. The annual percentage growth rate is calculated by dividing the percent growth by N, which is the number of years. The calculation (415.79 - 200) / 200 * 100 results in 107.89. The annual percentage growth rate is then 107.89 divided by 15, which equals 7.193.
Kevin, since the problem states a number (x) minus 20, and given that 20 is mentioned later, it indicates that it is the second number involved here.