Write relational expressions to express the following conditions (using variable names of your choosing):

a. The distance is equal to 30 feet.
- [tex]\text{distance} = 30[/tex]

b. The ambient temperature is 86.4 degrees.
- [tex]\text{temperature} = 86.4[/tex]

c. A speed is 55 mph.
- [tex]\text{speed} = 55[/tex]

d. The current month is 12 (December).
- [tex]\text{month} = 12[/tex]

e. The letter input is K.
- [tex]\text{letter} = 'K'[/tex]

f. A length is greater than 2 feet and less than 3 feet.
- [tex]2 < \text{length} < 3[/tex]

g. The current day is the 15th day of the 1st month.
- [tex]\text{day} = 15 \text{ and } \text{month} = 1[/tex]

h. The automobile's speed is 35 mph and its acceleration is greater than 4 mph per second.
- [tex]\text{speed} = 35 \text{ and } \text{acceleration} > 4[/tex]

i. An automobile's speed is greater than 50 mph and it has been moving for at least 5 hours.
- [tex]\text{speed} > 50 \text{ and } \text{time} \geq 5[/tex]

j. The code is less than 500 characters and takes more than 2 microseconds to transmit.
- [tex]\text{code\_length} < 500 \text{ and } \text{transmission\_time} > 2[/tex]