Solve
-In 13 Weeks, the Value of Bob Treatman's Day $\$ 520$

Multiple Choice

Solve.
-In 13 weeks, the value of Bob Treatman's day trading account decreased by $\$ 520$ . What was the average weekly change in the value of the account expressed as a signed number?

A) $-\$ 40$ per week
B) $\$ 38$ per week
C) $-\$ 46$ per week
D) $-\$ 42$ per week