Suppose a railroad rail is 3 kilometers and it expands on a hot day by 15 centimeters in length. approximately how many meters would the center of the rail rise above the ground?

The center of the rail rise above the ground is:

                   15 meter.

As the railroad on expansion will form a right isosceles triangle.

The railroad is 3 km=3000 m before expansion.

It expanded by 15 cm.

This means that in meters it expanded by 0.15 m

Hence, the railroad  after expansion it is:  3000.15 m

Now we need to calculate the hypotenuse of the right triangle in order to find the  center of the rail rise above the ground.

and hence it is calculated as:

which in meters is approximately given by:

                              15 meters.  

step-by-step explanation:

because 1/3 is a fraction. we can tell because there is a divisor symbol between the 1 and the 3. if we were to add 2 fractions together, we would add the numerators, which is the number on top, but not the denominators, which is the number on the bottom

1/3+1/3=2/3

hope this !

answer: 8 years

step-by-step explanation:

the explanation is that in 8 years the child will be 20 and in 8 years the father will be 40 and 20 is half of 40.