The answer is A because all the other answers don’t use the cooperative denominators
286 is the sum of the series below. You can plug this in or use long addition.
Either that or you make an average and that's your answer.
Answer:
11.2 feet
Step-by-step explanation:
Given: Height of platform (Opposite)= 5 foot
Distance of slope from the base of platform (adjacent)= 10 feet
Picture drawn to show the measurement.
Lets find the length of slope.
Using the Pythagorean theoram.

Subtituting the value in the formula.

⇒ 
⇒ 
Putting square root on both side
We know, √a²= a
⇒ 
∴ hypotenous= 11.18 
Hence, the slope is 11.2 feet