B is the right answer glad I could help !!
Answer:
11.625
Explanation:
L = length of the ladder = 16 ft
= rate at which top of ladder slides down = - 3 ft/s
= rate at which bottom of ladder slides
y = distance of the top of ladder from the ground
x = distance of bottom of ladder from wall = 4 ft
Using Pythagorean theorem
L² = x² + y²
16² = 4² + y²
y = 15.5 ft
Also using Pythagorean theorem
L² = x² + y²
Taking derivative both side relative to "t"



= 11.625 ft/s
1. farther
2. true
the equator is a weirdo
D: Sóng có thể truyền qua khoảng không của không gian,
với tốc độ ánh sáng.