Acountrys population in 1995 was 162 million. in 1999 it was 167 million. estimate the population in 2004 using the exponentional growth formula. round your answer to the nearest million

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.