Atriangle has angel measurements of 78°, 90°, and 12°. what kind of triangle is it?

Find the arc length parameter along the given curve from the point where tequals=0 by evaluating the integral s(t)equals=integral from 0 to t startabsolutevalue bold v left parenthesis tau right parenthesis endabsolutevalue d tau∫0tv(τ) dτ. then find the length of the indicated portion of the curve r(t)equals=1010cosine tcost iplus+1010sine tsint jplus+88t k, where 0less than or equals≤tless than or equals≤startfraction pi over 3 endfraction π 3.

A50% increase followed by 33 1/2% decrease

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?