What is the length?
the length of the pendulum is blank feet.

200 ft

Step-by-step explanation:

T = 2π √(L / 32)

T² / 4π² = L /32

L = (T² / 4π²) x 32 = (15.7² / 4 x 3.14²) x 32 = 200

c

step-by-step explanation:

i think because what else can be a sample of every member

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°