Total distance = 5 km + 10 km = 15 km. Total time = 1 hour + 1 hour = 2 hours. Average speed = Total distance / Total time = 15 km / 2 hours = 7.5 km/h.

Let the width be w. Then the length is 2w. The perimeter is 2(w + 2w) = 48, which simplifies to 6w = 48, so w = 8 cm.

Speed = Distance / Time = 5 km / (25/60) hours = 5 / (5/12) = 12 km/h.

Total length = 3 * 1.20 m = 3.60 m. The uncertainty for 3 tables = 3 * 0.02 m = 0.06 m.

The range of possible true values is from 25.0 - 0.5 to 25.0 + 0.5, which is 24.5 °C to 25.5 °C.

Average speed = Total distance / Total time = 300 km / 4 hours = 75 km/h.

Speed = Distance / Time = 300 km / 4 hours = 75 km/h.

Time = Distance / Speed = 150 km / 75 km/h = 2 hours.

Total distance = 60 + 90 = 150 km. Time for first part = 60/30 = 2 hours. Time for second part = 90/60 = 1.5 hours. Total time = 2 + 1.5 = 3.5 hours. Average speed = Total distance / Total time = 150 / 3.5 = 42.86 km/h, which rounds to 45 km/h.

Total distance = 120 km. Time for first part = 60/30 = 2 hours. Time for second part = 60/60 = 1 hour. Total time = 3 hours. Average speed = Total distance / Total time = 120/3 = 40 km/h.

Distance = Speed × Time. Therefore, distance = 60 km/h × 2.5 h = 150 km.

Distance = Speed × Time. Therefore, distance = 60 km/h × 2.5 h = 150 km.

Distance = Speed × Time = 60 km/h × 2.5 h = 150 km.

Minimum possible volume = Measured volume - Uncertainty = 250.0 mL - 1.0 mL = 249.0 mL.

'Modern' is the antonym of 'ancient', referring to something contemporary.

'Natural' is the antonym of 'artificial', which refers to something made by human beings rather than occurring naturally.

'Rare' is the opposite of 'frequent', meaning not occurring often.

'Quiet' is the opposite of 'noisy'.

'Pessimistic' is the antonym of 'optimistic', which refers to a negative outlook.

'Fail' is the opposite of 'succeed'.

'Defeat' is the antonym of 'victory', indicating a loss in a competition.

A conjunction is a part of speech that connects words, phrases, or clauses.

An interjection is a part of speech that expresses strong emotion or surprise, such as 'wow!', 'ouch!', or 'hey!'.

A noun names a person, place, thing, or idea.

An adjective provides additional information about a noun.

A preposition shows the relationship between a noun (or pronoun) and other words in a sentence.

A preposition shows the relationship of a noun or pronoun to other words in a sentence.

'Gregarious' refers to being sociable and enjoying the company of others, so the synonym is 'sociable'.

'Vigilant' means keeping careful watch for possible danger or difficulties; hence, the synonym is 'alert'.

'Candid' means truthful and straightforward; thus, the synonym is 'honest'.