Answer:
The expected number of nondefective lightbulbs is 980 out of a random sample of 1,000 bulbs.
Explanation:
Hi, if the company is right, this is the operation that we need to do.

So, we are expecting 980 working bulbs out of a sample of 1,000
Best of luck
Answer:
$3,233.12
Explanation:
Data given in the question
Purchase value of two coins = $790
First coin rate = 7.3%
Second coin rate = 6.7%
So, after considering the above information, the amount worth in 20 years
= Purchase value of two coins ×(1 + interest rate)^number of years
= $790 × (1 + 0.073)^20
= $790 × 4.0925541961
= $3,233.12