50d + 75 = c\nwhat would be the cost of a two - week drone rental (14 days)?

Explanation:

Step1: Substitute number of days

Given the formula $50d + 75=c$, and $d = 14$. Substitute $d$ into the formula: $50\times14+75$.

Step2: Calculate multiplication

First, calculate $50\times14 = 700$.

Step3: Calculate addition

Then, calculate $700 + 75=775$.

Answer:

$775$