It takes Dana 9 hours to make 12 costumes. Which proportion can be used to find h, the number of hours that it will take Dana to make 20 costumes at the same rates?

A. 9/12 = h/20
B. 9/h = 20/12
C. 9/20 = 12/h
D. 9/12 = 20/h

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.

Can someone me with these two circle theorem questions asap?

Aresearch study is done to find the average age of all u.s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample