Well standard form is Ax+By=C, so just move the -7x to the front so -7x+47=16
It would be irrational considering its a square root.
a) t in this equation would be the number of years so in this case t=4
b)3.5/100=0.035
c)A=600(1+(0.035/1)^(1×4)=688.51
d) The account earned $88.51
The answer is 10 because you juss square root them then times them together and that makes 10