16 cm - 2.5 cm = 13.5 cm, which is 1/4 of the diameter of the large gear. Take 13.5 cm * 4, and you have the diameter of the large gear, which is 54 cm.
x ≤ 12
Solution:
Let us take the number be x.
A number : x
A number divided by three : 
A number divided by three less two : 
A number divided by three less two is at most two : 
Now, simplify the inequality,

Add 2 on both sides of the inequality,


Multiply by 3 on both sides of the equation,


Hence x ≤ 12.
1. Cuando encendí la radio, las noticias .......... (terminar)
2. El centro comercial ....... (no / abierto) aún cuando llegué
3. ……………. (le dices) la verdad a tus padres?
4. El señor Palmer .......... (no / hablar) ningún chino antes de mudarse a pekín
Answer:
504
step by step : 14x18=252. 20x18=360. 18x18=324. 58x18=1044. 71x18= 1278. 36x18=648. 28x18=504.
Arrange the data in an ascending order and the median is the middle value. If the number of values is an even number, the median will be the average of the two middle numbers.
504
Rate = 10/2 = 5 trees per hour
150trees/5 trees per hour = 30 hours
the answer is D = 30 hours