The online auction website, Online Sales, pays its vendors half of the selling price of each item sold and deducts a listing fee of $5 per item. Another online auction site, Sales Alive, pays its vendors 40% of the selling price of the items with no listing fee.

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central angle of a triangle has the same measure as its intercepted arc.

step-by-step explanation:

1,407.5 hours

step-by-step explanation:

we first convert all the time to hours and then sum them up.

there are 24 hours in 1 day, in 58 days, there are 24 x 58 = 1,392 hours.

there are 60 minutes in 1 hour, thus, 30 minutes will be equivalent to 30 / 60 = 0.5 hours.

therefore, the number of hours it will take mercury to complete a full rotation is 1,392 + 15 + 0.5 = 1,407.5 hours