Write the place value of the underlined digit. Round each number to the place of the underlined digit.

The equation for the line containing the vertical right edge of the arch is x = 60.

How can we find the equation of the line representing the right edge?

The line representing the right edge is the line passing through the parabola on the right side at y = 20.

We can find the equation of the line as follows:

It is given that the left edge of the arch is the y-axis.

The parabola and the vertical base are symmetrical.

We can see that the left edge begins (0, 20). This means that the right edge would also have y = 20.

Observe the given graph. We can see that the parabola passes y = 20 again at the point (60, 20).

This means that the equation of the line representing the right edge is x = 60.

Therefore, we have found the equation for the line containing the vertical right edge of the arch to be x = 60.

Learn more about parabolas here: brainly.com/question/4148030

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Answer:

The answer is x=60.

Since the arch and its base are symmetrical, so that other side of arch should be at (x, 20).  Refer to x-axis when y is equal to 20.  Thus, x=60.

I just took the test and the answer is correct.

Step-by-step explanation:

The area of the sector is 20π.

Step-by-step explanation:

• The area of the circle = 100π
• The formula for area of the circle = πr²
• The central angle of the sector = (2/5)π radians

The central angle should be converted from radians to degrees.

To convert radian to degree :

1 rad × 180/π gives the degree value.

Therefore, (2/5)π × 180/π = (2/5) × 180

The π gets cancelled out.

⇒ 2× 36

⇒ 72°

To find the area of the sector :

The formula to calculate area of the sector = (central angle/360) × πr²

⇒ (72/360) × 100π

⇒ (1/5) × 100π

⇒ 20π

The area of the sector is 20π.