Would be helpful if someone gave an explanation also

2x + 1 < 5 solve the following inequality. then place the correct number in the box provided.

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?