4. The tires on a truck have been changed. The diameter of the new tire is 108.5in and the diameter of the factory tire was 98.4 in. The speed limit is 55 mph. If your speedometer says 50mph, are you actually speeding?

One statement could be 12/4=3

$250 deductible means jane must pay the first $250 of her bill. so the insurance company paid = (80% of bill) - deductible = (0.8 x $2550) - $250 = $2040 - $250 = $1790 and jane's cost is = (bill) - (insurance payment) = $2550 - $1790 = $760

I'm a bit puzzled here because they did not provide you with any measures of the other angles, so i am unable to provide a theorem or postulate to support my answer, but i'd say 90 degrees because it looks closer to a right angle than anything.