×question 4 of 8 sara worked 28 hours last week. joan worked 6 hours less than sara, and erin worked half as many hours as joan. how many hours did sara, joan, and erin work last week?

Joan worked 22 hours, and Erin worked 11 hours. All together (including Sara's hours) they worked 61 hours.

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°

a

step-by-step explanation: