Final answer:
The closest estimated cost of 18 computers at $1,119.85 each is $20,000. The actual total cost is $20,157.30, which is greater than the estimated cost.
Step-by-step explanation:
The total estimated cost of the computers can be found by rounding the price of each computer to the nearest hundred and then multiplying by the number of computers. The price of $1,119.85 can be rounded to $1,100 for estimation purposes. Multiplying $1,100 by 18 gives us an estimated total of $19,800. Thus, according to the provided options, the closest estimate is $20,000 (option b).
To estimate the total cost of buying 18 new computers, we need to multiply the cost of each computer by the number of computers being purchased. Each computer costs $1,119.85. So, the estimated total cost would be $1,119.85 x 18 = $20,156.70.
To find the actual cost and compare it to the estimated cost, we need more information. The actual cost cannot be determined from the given information.
To find the actual total cost, we multiply the exact cost of one computer by the total number of computers: $1,119.85 × 18, which equals $20,157.30. When we compare this to the estimated cost, we see that the actual cost is greater than the estimated cost (option b).