The second one:
3^7 x 3^(86/10) x 3^(9/1000)
That is because when you multiply powers with the same base ( in this case they are all 3), you just leave the base as it is and add the exponents
so it is basically 3^(7 + 86/100 + 9/1000) which is 3^7.869
The sum of geometric series is given by:
Sn=a(1-r^n)/(1-r)
a= first term=$22,600
r=rate=1-0.14=
n=number of terms= 5 years
thus the total amount sold will be:
Sn=22600(1-0.14^5)/(1-0.14)
Sn=$26,277.66
The total amount sold was $26,277.66
The average temperature change is -5 because in 2 hours it fell 10 degrees so divide 10 by 2 you get 5 PH
