Answer:
D
Step-by-step explanation:
the domain of this is x>=7
the range is x<=1
so 6 is in neither
Answer:
2b
Step-by-step explanation:
a/b = 2/3
3a = 2b
Answer:
C
Step-by-step explanation:
can I be brainliest?
Answer:
This indicates that the chances of the mean life span today is greater than 70 years is 0.5871
Step-by-step explanation:
The past year showed an average life span of 71.8 years.

Population standard deviation = 8.9 years

We are supposed to find the mean life span today is greater than 70 years
i.e. P(X>70)
Formula : 

Z=−0.202
P(X<70)=0.4129
P(X>70)=1-P(X<70)=1-0.4129=0.5871
Hence This indicates that the chances of the mean life span today is greater than 70 years is 0.5871
If you mean x^2 then there would be no answer after all, 3^2= 9 and 4^2= 16 so
If you mean 2x then the answer would be 5
Hope I helped?