Plz tell me if the quadratic function is really x=-b plus or minus the square root of b squared minus 4ac all over 2a?

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.

Determine the standard form of the equation of the line that passes through (-2,0) and (8,-5)

If the figures below are similar give the scale factor of figure a to figure b