Explanation

When n is odd, the binomial expansion of (a + x)^n has n + 1 terms.

Since the total number of terms is even (odd n + 1), there are 2 middle terms.

Explanation

tan θ < 0: Quadrants II and IV

sin θ < 0: Quadrants III and IV

Common quadrant: IV

Explanation

In an Entity-Relationship (E-R) diagram, a rectangle represents an Entity.

Attributes are shown as ellipses.

Relationships are shown as diamonds.

Explanation

y = mx + c

This is called the slope-intercept form, where:

 m = slope of the line

 c = y-intercept (value of y when x = 0)

It shows how y changes with x in a straight line.

Explanation

Blood types are non-numeric categories (A, B, AB, O), with no inherent order, so they are nominal.

Since each individual has only one blood type, the data is counted and presented in a discrete frequency distribution.

Explanation

Class boundaries define the exact limits for grouped data.

For a class centered at 25 inches, a typical class width (e.g. 5.2) gives boundaries like 23.50 to 28.70.

Explanation

A primary key must be unique for each record and never change.

Zip code is not unique (many people can share the same zip code), so it's not suitable as a primary key.

Explanation

Step 1: Determine the truth value of p

p : 3 < 5 is True.

Step 2: Determine the truth value of q

q : 1 < 0 is False.

Step 3: Determine the truth value of p ∧ q

p ∧ q is True only if both p and q are True. Since q is False, p ∧ q is False.

Explanation

A standard die has 6 numbers: 1, 2, 3, 4, 5, 6

Odd numbers: 1, 3, 5 → 3 outcomes

Total outcomes: 6

Probability = 3/6 = 1/2

Explanation

The else keyword is used to provide an alternative block of code if the if condition is false.

It works with if to handle two different choices in decision-making.