Enrique is trying to save $672 for a new guitar. he earned $420 in march by working in a bookstore for a total of 56 hours. how much does he earn per hour?

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.

Could somebody me with this radical simplification?

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?