What is the name of the main thread in an Android application?

Manifest file is optional in Android app development.

What is the purpose of an Android layout file?

What is the purpose of an Android resource file?

Solve the inequality. Show all work on scratch paper.x2 – 7x – 8 ≤ 0

If A denotes the area of the sector of a circle of radius r formed by the central angle θ, find the missing quantity. If necessary, round the answer to two decimal places. Show all work on scratch paper.r = 39.7 centimeters, θ = radians, A = ?

Find the domain of the rational function. Show all work on scratch paper.R(x) =

Solve the inequality. Show all work on scratch paper. < 5

Find the exact value under the given conditions. Show all work on scratch paper. sin α = , 0 < α < ; cos β = , 0 < β < Find cos (α + β).  

Find the sum of the arithmetic sequence. Show all work on scratch paper.2 + 4 + 6 + … + 350