Explanation

Let's break it down:

Cars washed in 18 minutes = 8

Cars washed per minute = 8 / 18

To find cars washed in 3 hours (180 minutes):

Cars washed in 180 minutes = (8 / 18) * 180

= 8 * 10

= 80

Explanation

Let's simplify:

(2⁰⋅⁶ ∗ 4⁰⋅³ ∗ 8⁰⋅²) / 2¹⋅⁸

= (2⁰⋅⁶ ∗ (2²)⁰⋅³ ∗ (2³)⁰⋅²) / 2¹⋅⁸

= (2⁰⋅⁶ ∗ 2⁰⋅⁶ ∗ 2⁰⋅⁶) / 2¹⋅⁸

= 2¹⋅⁸ / 2¹⋅⁸

= 1

Explanation

"Set off" is a phrasal verb that means to start a journey or trip.

Example: They set off early in the morning to avoid traffic.

Explanation

The kidneys filter the blood to remove waste products and excess fluids, forming urine.

They play a key role in maintaining the body's fluid and electrolyte balance.

Explanation

Let's break it down:

Akram travels 8 meters north.

Then, he takes a right turn (east) and travels 6 meters.

To find the distance from home, use the Pythagorean theorem:

√(8² + 6²) = √(64 + 36) = √100 = 10 meters

Explanation

Given:

1/4 (3 4/4 + 4 6/8 + 7 3/12)

Simplify each term:

3 4/4 = 3 + 1 = 4

4 6/8 = 4 + 3/4

7 3/12 = 7 + 1/4

Add the terms:

= 1/4 (4 + 4 + 3/4 + 7 + 1/4)

= 1/4 (15 + 3/4 + 1/4)

= 1/4 (15 + 1)

= 1/4 × 16

= 4

Explanation

The reporting verb "said" is in the past tense, so the verb in the reported speech must also change to past tense.

"Don't want" changes to "didn't want", and "you" becomes "me".

Correct: She said that she didn't want to come with me.

Explanation

To find the speed, we use the formula:

Speed = Distance / Time

Given:

Distance = 15 km

Time = 15 minutes = 15/60 = 0.25 hours

Speed = 15 km / 0.25 hours

= 60 km/h

Explanation

Kangaroo is a warm-blooded mammal, meaning it maintains a constant body temperature regardless of the environment.

Crocodile, shark, and snake are cold-blooded, relying on external sources to regulate their body temperature.

Explanation

A mammal is a warm-blooded vertebrate that has hair/fur and feeds milk to its young.

Kangaroo is a marsupial mammal, known for carrying its young in a pouch.