Herbert has sold 90, 45, 103 and 68 appliances in the last four months, respectively. How many appliances will he need to sell this month to maintain an average of at least 77 sales per month

The sale this month = 79

Step-by-step explanation:

Let the amount he needs to sell this month = x

Note that number of entries = number of months = 5

To maintain an average sales of 77, the amount of sale in month 5 is determined as follows:

560

step-by-step explanation:

giggidy

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°