The school held there talent quest and this year they had 1,204 people in attendance. Last year the attendance was only 860. What was the percentage increase from last year?

28.57℅

Step-by-step explanation:

If last year attendance was 860 and the attendance increases to 1204:

Attendance increment = 1204-860

= 344

%increase = increment/current attendance × 100%

% increase = 344/1204 × 100

℅ increase = 34400/1204

% increase = 28.57%

Therefore the percentage increase from last year is 28.57℅

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.

i found two solutions,   n = 2 • ± √3 = ± 3.4641

step-by-step explanation: