Which of the following books encouraged the buuilding of a powerful American navy; acquisition of inslands in the pacific ocean and caribbean sea; and the creation of a canal to connect the atllantic ocean to the pacific ocean?

The Influence of Sea Power Upon History by Alfred Thayer Mahan                    

Explanation:

Sea Power Upon History Influence: 1660–1783 is indeed a submarine warfare stuff written from Alfred Thayer Mahan, from 1890. It describes the function of maritime power during most of the seventeenth and eighteenth centuries, and addressed the different factors required to sustain and acquire maritime influence, with focus on providing the largest and most powerful ship.

Scholars deemed it the most prominent single book on naval planning. Most large navies soon followed its policies, eventually contributing to the naval arms race of World War I. It is often cited as among the United States 'leading factors to being a national power.

angle a = 40.6°

step-by-step explanation:

for any right angle triangle we know the pythagoras theorem reveals

hypotenuse² = height²+base²

by this formula we will calculate the length of hypotenuse

h² = 6²+7²

⇒ h =√36+49 = √85 = 9.22

now from the given triangle sin a = height/ hypotenuse

                                                sin a = 6/9.22 = 0.651

therefore

so angle a = 40.6°

what the first or next guy says