How long will it take a jet airliner to travel 310 kilometers at a speed of 930 kilometers per hour?

Answer:

82,800 centimeters.

Step-by-step explanation:

The tallest building in the world, The Burj Khalifa in Dubai is 0.828 kilometers high.

We have to convert this unit to centimeters.

As we know 1 km = 1000 meters

                     1 meter = 100 centimeters

Therefore,    1000 meter = 1000 × 100 = 100,000 centimeters.

0.828 km = 0.828 × 100,000 = 82,800 centimeters.

The height of the Burj Khalifa is 82,800 centimeters.

Note: you have not added the image, so I am assuming the quadrilateral MNOP with coordinates M(-4, 0), N(5, -3), P(2, 6) and O(-5, 7). It will anyhow clear your concept as I would explain the concept of reflection over the x-axis.

Step-by-step explanation:

Considering the quadrilateral MNPO with assumed vertices

• M(-4, 0)

• N(5, -3)

• P(2, 6)

• O(-5, 7)

THE RULE OF REFLECTION states that when we tend to reflect a point let say (x, y), across the x-axis, the x-coordinate does not change or transform, but the y-coordinate is changed into its opposite sign i.e. (x,-y).

So, the coordinates of the point in the image after quadrilateral MNPO is reflected over the x-axis will be:

(x, y)                      (x, -y)

M(-4, 0)                     M'(-4, 0)

N(5, -3)                     N'(5, 3)

P(2, 6)                      P'(2, -6)

O(-5, 7)                   O'(-5, -7)

Hope, it will help you clear your concept regarding reflection of an object over the x-axis. Using this understanding, you can solve any other question related to this topic.