A gate is 3 feet tall and casts a shadow 5 feet long .At the same time a nearby building casts a shadow 45 feet long.
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His total earnings would be (18%)[$6.25(hours in 1st job) + $7.50(hours in 2nd job)]. However, we know that his total hours is 40 hours, so if we let the number of hours he spends in his 1st job be x, the number of hours in the 2nd is (40 - x).
Then his total earnings would be
. This means that we need to know the time he spends in 1 job (either the first or the second will do).
Then his total earnings would be