I need help with these question not sure what I'm doing wrong

7. 9.4%

8. 9.4ft

Step-by-step explanation:

Question 7:

The percent grade is another term for slope

The slope formula is rise over run

The rise in question 7 is 1500 meters

The run in question 7 is 16km, or 16000 meters

1500/16000 is 0.09375. 0.09375 in percent is 9.375%

round to the nearest tenth, and it is 9.4%

Question 8:

To solve this question you must know what the pythagorean theorem is.

The pythagorean theorem: in a right triangle the square of the hypotenuse is equal to the sum of the squares of the two legs.

Famously known as a^2+b^2 =c^2

The "length" of the rail would be the hypotenuse

(the rise and the run are the legs of the "triangle")

the rise in question 8 is 5 feet

the run in question 8 is 8 feet

5^2 + 8^2 = c^2

25+64=c^2

89=c^2

√89 = √c^2

c = 9.43398113...

round to the nearest tenth to get 9.4 ft