A corporate communications team uses the function $N(t) = 100 + 15t$ to project the total number of unread emails in a shared inbox, where $t$ represents the number of days. If an analyst needs to evaluate the function to find the number of unread emails after 7 days, which of the following shows the correct initial substitution step?

An administrative assistant uses the function $N(t) = 100 + 15t$ to manage a high-volume shared inbox. Match each numerical value from the function or its evaluation for $t = 7$ days with the correct interpretation of what it represents in this scenario.

An administrative team tracks their shared inbox volume using the function $N(t) = 100 + 15t$, where $t$ represents the number of days elapsed. In this specific mathematical model, the variable $t$ is classified as the ____ variable.

An office manager uses the function $N(t) = 100 + 15t$ to monitor the growth of unread messages in a support inbox. Arrange the following steps in the correct order to recall how the total count of 205 emails is calculated for a 7-day period as shown in the model.

An operations manager is reviewing an email backlog model given by the function $N(t) = 100 + 15t$, where $t$ represents the number of days. When recalling the steps to evaluate this function for a 7-day period, the simplification step yields $N(7) = 100 + 105$, which means the final total of unread emails is 105.