Answer:
116
Step-by-step explanation:
Answer:
1) √248 = ± 15.7480157
2)√63 = ± 7.93725393
Step-by-step explanation:
Answer:
18
Step-by-step explanation:
The answer is b because 95 confidence is interval for the mean lifespan
#4)
cross multiply
2(8x+10) = 4 * 5x
16x + 20 = 20x
4x = 20
x = 5