Answer:
where is the picture ?
Step-by-step explanation:
You can factor -80 as

So, we have

The square root of a product is the product of the square roots:

Since
and
, we have

i believe the correct answer is 163
Answer:At 95% confidence interval, the lower end is 64.306 and the upper end is 64.614
At 98% confidence interval, the lower end is 64.268 and the upper end is 64.652
Step-by-step explanation: