Decide whether each expression is equivalent to 0.75t-21

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.

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8