Question

a city researcher wants to calculate the number of cars per hour that passed down main street during the summer festival. what information is needed to make the following calculation?
total hours of the summer festival (hr)
number of cars (cars)
make conversion factor
cars passed per hour (cars/hr)
carlos is in a band that has made some cds of their music. they have sold some of the cds and want to know how many remain. what information is needed to make the following calculation?
cds produced (cds)
subtract
cds remaining (cds)
cds sold (cds)
sam runs a company that takes visitors on day long mountain hikes. each group of hikers must have a certain number of guides leading them. he wants to know how many guides he needs for tomorrow. what information is needed to make the following calculation?
guides per group (guides/group)
use conversion factor
guides (guides)
george works as a pilot and wants to determine his total flight time for the two flights he will pilot today. what information is needed to make the following calculation?
flight 1 time (hrs)
add
total flight time (hrs)
flight 2 time (hrs)

Explanation:

Step1: Identify calculation logic

To find total guides, we use the relationship:
$$\text{Total Guides} = \text{Number of Hiker Groups} \times \text{Guides per Group}$$
This uses a conversion factor (guides per group) to convert number of groups to total guides.

Step2: Match missing variable

The given value is guides per group, so the missing required information is the number of hiker groups.

Answer:

Number of hiker groups (groups)