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A7-ft ladder is placed against a wall with its base 3 ft from the wall. How high above the ground is the top of the ladder? Round your answer to the nearest tenth if needed.​

Respuesta :

Answer:

6.3 feet

Step-by-step explanation:

use pythagorean theorem

a² + b² = c²

a² + 3² = 7²

a² + 9 = 49

Subtract 9 from both side

a² = 40

Take the square root of both sides

a = 6.324555320336759

Rounded

a = 6.3

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