Step-by-step explanation:
first of all, your teacher wrote nonsense in the answer options : an area is always given in squared units. never in cubed units (which would be volume).
the area is : 1/2 × perimeter × apothem
the perimeter is simply 12 × 5 = 60 meters.
apothem = (a/2)×cot(pi/12) = 5/2 × cot(pi/12) =
= 9.330127019... meters
so the area is
1/2 × 60 × 9.330127019... = 279.9038106... m²
therefore, the third answer option is correct (although it is m², and not m³).
by the way, you have question 3 wrong. I answered this with the correct apothem calculation in the explanation for question 4.
You would do 312 ÷ 52 because if he's going at 52 miles per hour then this gives you the amount of hours. 312 ÷ 52 = 6, so your answer is 6 hours. I hope this helps!
Answer: Lily is Correct.
Step-by-step explanation:
Lily is correct because the product of 15x52 is 15 times bigger than 15, therefore making a product (way larger) than 15. Lily is correct. Tell me if this helped or didn't help, but I hope it did (: !