What kind of insect is this ??

My area has a wild pig problem, and the advice is to kill lawn grubs to keep the pigs from destroying the lawn. Fine. I bought Scotts GrubEx and will apply it this week. However, its instructions say "apply 2.87 lbs of product per 1,000 sq. ft." Really? 2.87 lbs down to a hundredth of a pound? And now I have to determine the area of my non-rectangular lawn to a similar level of precision? What do folks actually do with these kind of instructions? Do people actually weigh out 2.87 lbs into a spreader (proportional to the actual measured square footage)? Or is there an easier way to eyeball the right amount?

I have two mouse infestations - in the garage and the attic. I've used Just One Bite II bars in the past with success. So far this season I've gone through 1 bar or 1 pound of bait (which is more than I've used in two seasons) in about 10 days and I'm still not done. The packaging states mice may consume a lethal dose in a single night's feeding. Mice eat 4-5 grams a day (453 grams in a pound) so that would mean I've had 100 feedings or 100 mice and am not done yet. This seems incredible, particularly as I haven't seen dead mice from the bait, heard or smelled anything. I'm satisfied the issue is mice, not something else as I've trapped a few and I know the poop. Also, I know mice may stash food so the numbers may not correlate exactly but I feel I'm missing something. Any thoughts?