Explain how you would estimate to subtract 189 from 643

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

Somone me i want to know what 18 hours out of 24 hours in a fraction

The manufacturer of a new product developed the following expression to predict the monthly profit, in thousands of dollars, from sales of the productwhen it is sold at a unit price of x dollars.-0.5x^2 + 22x - 224what is represented by the zero(s) of the expression? a.the profit when the unit price is equal to 0b.the unit price(s) when the profit is equal to 0c.the profit when the unit price is greatestd.the unit price(s) when profit is greatest