Find the Indicated Sum $\sum _ { i = 4 } ^ { 7 } 8 i$

question 65

Multiple Choice

Find the indicated sum.
- $\sum _ { i = 4 } ^ { 7 } 8 i$

• A) 176
• B) 120
• C) 88
• D) 56

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Definitions:

Average Service Rate

The average number of customers or units that can be processed over a certain time frame in a service system.

Expected to Stay

An estimation of the duration or likelihood that an individual or item remains in a particular state or location.

M/D/1

M/D/1 is a queueing model designation indicating a system with a Poisson arrival process (M), deterministic service times (D), a single server (1), and exponential service times.

Constant Service Time

A situation where the time required to serve a customer or complete a process is the same each time, allowing for predictable scheduling and planning.