Solve the logarithmic equation by writing in exponential form or by graphing. Round to the nearest thousandth if necessary. log (2x − 2) = 4

Anyone know? is appreciated! will mark brainliest if correct!

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.

Aliter of water contains about 3.35 x 10^25 molecules. a certain river discharges about 2.9x 10^8 l of water every second. about how many molecules does the river discharge every minute? write your answer in scientific notation