Question

pliz help
1).3^x=4^3-2x
2).log(x+10base7=1-log(x-5)base7
3).x^5-x^4+3x+2/x^2+2
4).x^2+4x+13=0
5). The population of a city is given by
P(t) =86,000e^0,026t ,where t is the number of years from the year 2000.
i. Find the population in the year 2011.
ii.When will the population double that in 2000.
pliiiiiiiiiiiiiiiiiiz help guys pliz I beg