Answer:
2.10
Step-by-step explanation:
The point estimate for the population standard deviation of the height of the cabinets equals to the provided standard deviation of the cabinets. Rounding off the given standard deviation which is 2.1 to 2 decimal places as the question requires then the point estimate for the population standard deviation of the height of the cabinets is approximately 2.10 ( 2 decimal places)
Answer
Find out the $4 is what percent of $50 .
To prove
By using the percentage formula

As given in the question
Part value = $4
Total value = $50
Put all the values in the percentage formula as mentioned above.

solving the above

Percentage = 8%
Therefore $4 is 8% of $50 .