Bunuel wrote:
One millisecond is 0.001 of a second. The costs for a single run of a computer program are $1.07 for operating-system overhead, $0.023 per millisecond of computer time, and $4.35 for the mounting of a data tape. What is the total of these three costs for 1 run of a program that requires 1.5 seconds of computer time ?
(A) $7.15
(B) $8.87
(C) $28.96
(D) $35.57
(E) $39.92
Two of the costs are fixed:
$1.07 for operating-system overhead
$4.35 for the mounting of a data tape
So, let's focus on
$0.023 per millisecond of computer time.
Rewrite as:
$0.023 for every 0.001 of a secondMultiply both numbers by 1000 to get:
$23.00 for every 1 secondMultiply both numbers by 1.5 to get:
$34.50 for 1.5 secondsSo, the computer time costs
$34.50$34.50 +
$4.35 +
$1.07 =
MORE THAN $35.57Answer: E
Cheers,
Brent
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