Answer:
i believe the answer is 3.2 and the mean is 19
Answer:
step 3: he should have divided both sides by -7
When you multiply you add the exponents, so 7^9*7^-3=7^6
Answer:
the probability is 0.0202
Step-by-step explanation:
The computation is shown below:
Given that
The Average life span = 17 hours
Standard deviation = 0.8 hours
Sample = 30 batteries
Sample mean = 16.7 hours
Now based on the above information
The probability is

Hence, the probability is 0.0202
First u multipl 3 times 3 then 9 times 4 I think which is 36