What is the answer to this problem -2b+6=-2b-2b?

Which of the following is the missing term, a2, of the geometric sequence in which a1=2 and a3=200

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 is the lcm of 16 and 40 ? 24 and 40 ?