edandjill24 edandjill24

30-12-2019
Mathematics

contestada

Will give brainleast need help ASAP

John is trying to find out how long he must make a staircase for his new deck which is 12 ft. high. He wants to start the stairs 21 ft. from the deck. How long a staircase does he need?

Respuesta :

kenlingdad kenlingdad

30-12-2019

Answer:

3 √65 ≈ 24.2 ft

Step-by-step explanation:

Length of staircase² = 21² + 12² = 585 = (3 √65)²

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