Answer:
[tex]30-3d\leq 20[/tex]
Step-by-step explanation:
Given :
The swimming pool is open when the high temperature is higher than 20 degrees Celsius.
Lainey tried to swim on Monday and Thursday (which was 3 days later).
To Find: . Write an inequality to determine the rate of temperature decrease in degrees Celsius per day, d, from Monday to Thursday.
Solution :
The pool was open on Monday, but it was closed on Thursday.
The high temperature was 30°C on Monday.
Let d represent the rate of temperature decrease in degrees Celsius per day from Monday to Thursday.
As temperature decreased at a constant rate in the next 3 days.
So the rate of temperature will decrease 3d degree Celsius in 3 days.
We are also given that The swimming pool is open when the high temperature is higher than 20 degrees Celsius.
Since it was closed on Thursday . So, temperature on Thursday was less than 20°C.
So, the inequality becomes:
[tex]30-3d\leq 20[/tex]
Hence an inequality to determine the rate of temperature decrease in degrees Celsius per day, d, from Monday to Thursday:
[tex]30-3d\leq 20[/tex]
