If 10% of 50% of a number is 30 less than one- quarter of the number what is it?

I'm being volume of cylinder with 13 in. radius and 30 in height answer choices in pic

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.

What are the sotions to the quadratic equation 9x^2=4