Apair of earrings has a 130% markup rate based on cost. the selling price is $77.77. what is the markup to the nearest cent? (hint: find cost first.)

The markup is $43.95 ( approx )

Step-by-step explanation:

Let x be the cost price of the earring,

Given,

The earring is marked up 130 %,

Thus, the marked price of the earring = the cost price + 130 % of the cost price

= x + 130 % of x

Since, here, the marked price = Selling price = $ 77.77,

So, the approximate cost price of the earring = $ 33.81,

And, the markup = 130 % of the cost price = 130% of 33.81

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°