Question

write inequalities to represent the situations below.
the temperature inside the lab refrigerator is no more than 40 °f.
use t to represent the temperature (in °f) of the refrigerator.

the cruising speed of the bullet train will be at least 130 miles per hour.
use s to represent the trains cruising speed (in miles per hour).

Explanation:

Step1: Analyze the first situation

The temperature \( t \) is no more than \( 40^\circ\text{F} \), which means \( t \) is less than or equal to \( 40 \). So the inequality is \( t \leq 40 \).

Step2: Analyze the second situation

The speed \( s \) is at least \( 130 \) miles per hour, which means \( s \) is greater than or equal to \( 130 \). So the inequality is \( s \geq 130 \).

Answer:

For the lab refrigerator: \( t \leq 40 \)
For the bullet train: \( s \geq 130 \)