Alright, so after a half-life, half of the previous number would be left. So basically,
180 g ← 0 half lives
90 g ← 1 half life
45 g ← 2 half lives
22.5 g ← 3 half lives
11.25 g ← 4 half lives
Therefore, the answer is 11.25 grams
There are 5280 ft in a mile. 55*5280=290400. So the car is travelling 290,400 ft/hour
Answer:it’s the second one
Step-by-step explanation:
Perimeter is the out side to think the outside of a rug and area in the inside so the outline of you room all you have to do is add the numbers given you can me only two numbers but let’s say you have a square that has 4 written on each side add 4 four times so 4+4+4+4=16 got it?
