How many 1 3/5-inch-thick books can fit on a 14 1/2-inch-long bookshelf?

They can fit 9 thick books into the bookshelf

Step-by-step explanation: So I like putting fractions into decimals.

1 3/5 = 1.6 and 14 1/2 = 14.5

I got .6 because 1/5 is 20%, 2/5 is 40%, (3/5 is 60%), and it keeps going.

Now that we have that all we have to do is 14.5 divided by 1.6

14.5 divided by 1.6 = 9.06

Hope this helps!

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°