The pizza was divided into 8 equal slices. Three friends each ate 2 slices. What is the ratio of slices eaten by the friends to the total number of slices? A map has a scale of 1 cm : 500 m. If a park

The pizza was divided into 8 equal slices.
Total slices $= 8$.

Each of the 3 friends had 2 slices.
Slices had by 3 friends $= 3 \times 2 = 6$.

The ratio of the number of slices the 3 friends had to the total number of slices is:

Divide both the numerator and the denominator by their greatest common divisor, which is 2.

The ratio is $3:4$.

The correct option is C. $\boxed{\text{C. } 3:4}$

8.

The scale is 1 cm on the map represents 500 m in actual distance.

Map distance $= 6 \text{ cm}$.
Actual distance $= 6 \text{ cm} \times \frac{500 \text{ m}}{1 \text{ cm}} = 3000 \text{ m}$.

Since $1 \text{ km} = 1000 \text{ m}$, divide the distance in meters by 1000.

The correct option is C. $\boxed{\text{C. } 3\text{km}}$

9.

Departure time $= 2:30 \text{ PM}$.
Arrival time $= 5:45 \text{ PM}$.

From 2:30 PM to 5:45 PM:

• From 2:30 PM to 3:00 PM is 30 minutes.
• From 3:00 PM to 5:00 PM is 2 hours.
• From 5:00 PM to 5:45 PM is 45 minutes. Total duration $= 2 \text{ hours} + 30 \text{ minutes} + 45 \text{ minutes} = 2 \text{ hours and } 75 \text{ minutes}$. Since 75 minutes is 1 hour and 15 minutes, the total duration is $2 \text{ hours} + 1 \text{ hour and } 15 \text{ minutes} = 3 \text{ hours and } 15 \text{ minutes}$.

The correct option is D. $\boxed{\text{D. } 195}$

10.

Departure time $= 10:00 \text{ AM}$.
Arrival time $= 6:45 \text{ PM}$.

• From 10:00 AM to 12:00 PM (noon) is 2 hours.
• From 12:00 PM to 6:00 PM is 6 hours.
• From 6:00 PM to 6:45 PM is 45 minutes. Total duration $= 2 \text{ hours} + 6 \text{ hours} + 45 \text{ minutes} = 8 \text{ hours and } 45 \text{ minutes}$.

The correct option is A. $\boxed{\text{A. } 8 \text{ hours and } 45 \text{ minutes}}$