Answer:
-3 +8a
Step-by-step explanation:
(3-8a) *(-1)
Distribute
3*-1 -8a*-1
-3 +8a
Your answer would be the time in takes for carbon-14 to elapse 3 half-lives.
5730 • 3 = 17190
X = velocity of plane
y = velocity of wind
x - y = 1680/5 = 336 mph .....(1) [ plane flying against the wind]
&
x + y = 1680/4 = 420 mph....(2) [ plane flying with the wind]
Adding (1) and (2) to eliminate y gives
2x = 756
x = 378 mph is the speed of the plane with no wind.
Mean- 6.22
Median- 5
Mode- 11 (appears 2 times)
Range- 14
((800+100+400+35)÷3,250)×100
=41%