Explanation

Explanation

The human hearing range is typically from 20 Hz to 20,000 Hz.

Sounds below 20 Hz are called infrasound.

Sounds above 20,000 Hz are called ultrasound, both of which are inaudible to humans.

Since 22,000 Hz is above 20,000 Hz, it is an inaudible sound.

Explanation

A colon (:) is used to introduce an explanation or emphasis.

The phrase after the blank explains why the pure in heart are blessed, making the colon the correct choice.

Explanation

Intensity means شدت

To increase means بڑھانا

Explanation

To evaluate the expression, follow the order of operations:

Multiply 2 and 3: 2 × 3 = 6

Subtract 5 from 4: 4 - 5 = -1

Divide -1 by -1: -1 ÷ -1 = 1

Add 6 and 1: 6 + 1 = 7

Explanation

The sentence is grammatically correct.

"They were all shocked at his failure in the competition." follows proper structure and usage.

Explanation

Ignoring disrespectful behavior can sometimes be the best approach, especially if the student is seeking attention through negative actions.

Maintaining professionalism and not reacting emotionally helps in handling the situation maturely, rather than escalating it.

Explanation

Explanation

The given equation is:

5x - 10 = 35

Add 10 to both sides:

5x = 45

Divide by 5:

x = 9

Explanation

In indirect speech, the exclamatory sentence is changed into a statement.

The present tense ("is") changes to past tense ("was").

The phrase "What a lovely dress it is!" is reported as "She exclaimed that it was a lovely dress."