You can convert 1000 to hex and see how many digits that requires:

So every integer below 1000 needs up to 3 digits.
Alternatively, we know that

, and that

requires

digits in its hex representation (e.g.

). Taking the logarithm, we get

, and adding 1 gives the number of digits needed to represent

. Similarly,
Answer:
-8
Step-by-step explanation:
The solution is shown in the photo
Answer:
25x2-36
1-16x2
Step-by-step explanation:
19. There are 24 hours in a day and Maria travelled for 15 days so multiply the two:
24*15=360
So Maria travelled for 360 hours.
22a. False; 2,000 lbs = 1 Ton
22c. True; 48 oz = 3 lbs