Final answer:
To find the height up on the building where the ladder reaches, you can use trigonometry. Using the length of the ladder and the angle of elevation, you can find the height using the sine function.
Step-by-step explanation:
To find the height up on the building where the ladder reaches, we can use trigonometry. Since we know the length of the ladder (98ft) and the angle of elevation (73 degrees), we can use the sine function to find the height.
We can set up the equation as follows:
sin(73) = h/98
Solving for h, we get:
h = 98 * sin(73)
Calculating this, we find that the ladder reaches a height of approximately 93.39ft up on the building.