Felicity has an online business. she charges $2.50 per wedding invitation. her monthly expenses are $650. how many invitations must she make to earn a profit of $2,800 per month?

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?

What is the volume of this container?