Lacey is attending a university where the cost for one year is $10,500. she has a scholarship worth $6,000 and a grant worth $900. she earns $45 a day at her job. how many days does she need to work to pay for 50% of the remaining amount?

She needs to work 40 days. $10,500 - $6,900 = $3,600. Half of this is $1800, so then we set up an equation. If d represents days, the 45d = $1800. Divide each side by 45 to isolate the variable. $1800 divided by 45 gives us 40 days (d = 40).

The answer is 109 times per second