Explanation

We find ancient historical sites across the four provinces of Pakistan.

"Across" is used to show something is spread throughout multiple areas or regions.

It correctly implies that historical sites are distributed in all provinces.

Explanation

The correct verb form after "can" is the base form — it should be "walk", not "walked".

Correct sentence: "How can you walk long distances when you are unwell?"

Explanation

To find the decimal equivalent of the binary number 1011:

(1 × 2³) + (0 × 2²) + (1 × 2¹) + (1 × 2⁰)

= (1 × 8) + (0 × 4) + (1 × 2) + (1 × 1)

= 8 + 0 + 2 + 1

= 11

Explanation

Explanation

1 + tan²θ = Sec²θ

This is a fundamental trigonometric identity.

Explanation

The model shown (– – – → + +) suggests starting with a negative and ending with a positive result.

–2 + 3 = 1, which matches that transition from negative to positive.

Explanation

The initial population is 2¹⁶ insects.

If the population doubles, the new population will be 2 * 2¹⁶ = 2¹⁷.

Explanation

To find when Mubashir and Ali will both exercise on the same day again, we need to calculate the Least Common Multiple (LCM) of their exercise days:

Mubashir: every 8 days

Ali: every 4 days

LCM of 8 and 4 = 8

They will both exercise again on the same day after 8 days.

Explanation

Explanation

A hypothesis is a testable and specific explanation for a scientific observation or question.

It can be confirmed or rejected through experiments and data collection.