An element with mass 310 grams decay by 5.7% per minute. how much of the element is remaining after 9 minutes, to the nearest 10th of a gram

After 9 minutes, 51.3% has decayed. So then you would take 310x0.513. That would mean approximately 150.0 grams would be remaining

The full question isn’t shown. part of it is cut off

A. p = 2(l + w)p/2 - l = ww = p/2 - l b. while isolating the variable w in the equation, i first divided both sides by 2 and then i subtracted l from both sides. i hope this .