Explanation

Let's analyze the given inequality: k ≤ x ≤ 3k + 12

We can derive the following conclusions:

I. x - 12 ≤ 3k: Subtracting 12 from all parts of the inequality gives x - 12 ≤ 3k - 12 + 12, which simplifies to x - 12 ≤ 3k. (True)

II. k ≥ -6: Since k ≤ x and x ≤ 3k + 12, we can substitute x for k in the second part of the inequality, getting k ≤ 3k + 12. Subtracting 3k from both sides gives -2k ≤ 12, and dividing by -2 (which flips the inequality sign) gives k ≥ -6. (True)

III. x - k ≥ 0: Since k ≤ x, we can subtract k from both sides to get x - k ≥ 0. (True)

Since all three statements are true, the correct answer is: I, II, and III

Explanation

To solve this problem, we can follow these steps:

1. Calculate the total number of letters inserted by all clerks in 2 hours:

•     Clerk A: 1100 letters/hour × 2 hours = 2200 letters
•     Clerk B: 1450 letters/hour × 2 hours = 2900 letters
•     Clerk C: 1200 letters/hour × 2 hours = 2400 letters
•     Clerk D: 1300 letters/hour × 2 hours = 2600 letters
•     Clerk E: 1250 letters/hour × 2 hours = 2500 letters

   Total letters inserted in 2 hours:  

   2200 + 2900 + 2400 + 2600 + 2500 = 12600 letters

2. Determine the remaining letters to be inserted:

•     Total letters to be inserted: 24,000
•     Letters already inserted: 12,600

   Remaining letters: 24,000 - 12,600 = 11,400 letters

3. Calculate the rate of the remaining clerks (A, B, and E) per hour:

•     Clerk A: 1100 letters/hour
•     Clerk B: 1450 letters/hour
•     Clerk E: 1250 letters/hour

   Total rate of A, B, and E:  

   1100 + 1450 + 1250 = 3800 letters/hour

4. Calculate the time required to insert the remaining letters:

•     Time required = Remaining letters / Rate of A, B, and E
•     Time required = 11,400 letters / 3800 letters/hour = 3 hours

Answer: More than 2 hr, but less than 4 hr.

Explanation

To find the number of pieces that can be cut, divide the length of the rod (330 cm) by the length of each piece (13.2 cm):

330 cm ÷ 13.2 cm = 25

So, 25 pieces of 13.2 cm can be cut from the 330 cm long rod.

Explanation

The correct inequality that represents the relationship between Jerry's estimate and the actual number of marbles in the jar is m - 10 ≤ n ≤ m + 10.

This inequality states that Jerry's estimate, m, is within 10 marbles (inclusive) of the actual number, n. By subtracting 10 from Jerry's estimate and adding 10 to his estimate, you create a range within which the actual number must fall.

For example, if Jerry estimates there are 50 marbles (m = 50), the actual number of marbles (n) must be between 40 (50 - 10) and 60 (50 + 10), inclusive.

Explanation

A trackball is a pointing device where the ball is held in place by a socket, allowing users to rotate the ball to move the cursor on the screen.

Unlike a traditional mouse, which moves over a surface, a trackball stays stationary, and the ball's rotation controls the cursor's movement in different directions.

Explanation

Nicknamed Muhammad Ali "The Greatest"

 He became a Muslim after 1961 and changed his name to Muhammad Ali

At 18, he won a gold medal in the light heavyweight division at the 1960 Summer Olympics

on February 25, 1964, He won the world heavyweight championship

Boxing record Muhammad Ali

Total fights 61

Wins 56

Wins by KO 37

Losses 5

ND27122022

*****

RY632023

Explanation

In presentation software like Microsoft PowerPoint, the "Action" button is used to link to different slides, files, websites, or sounds.

It allowing the user to navigate or trigger specific actions during a presentation.

Explanation

The set of all possible values of data items is called domain.

A relational table's column structure is defined by a domain.

In a domain, there exist values.

They belong to a database domain, which is a column.

Explanation

Plasma, the liquid component of blood, is composed of approximately 90% water.

This high water content helps transport nutrients, hormones, and waste products throughout the body.

Explanation

"Coolness" is associated with "Night" because nights are typically cooler.

Similarly, "Warmth" is associated with "Day" because days are usually warmer.