7. Calvin earns $10.00 per hour for up to 40 hours of work
in a given week. For each hour Calvin works over 40
hours in a week, he earns 1.25 times his regular hourly
rate. How much does Calvin earn for a week in which
he works 48 hours?
A. $600.00
B. $520.00
C. $512.50
D. $500.00
E. $481.25

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?

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

Which of the following contains a variable?