Which of these is an example of economic transformation that occurred in the early 20th century? a) the united states negotiate a peace agreement between japan and russia. b) the united states increased its size drastically by purchasing the territory of alaska from russia. c) president lyndon b. johnson supported a “flexible defense” strategy in response to perceived communist threats. d) president taft instituted the practice of “dollar diplomacy” through financial interventions in central america.

The correct option is D

The diplomacy of the dollar is a model of foreign policy of the United States -particularly manifested during the presidency of William Taft- in which US dominance is sought over several strategic countries for this nation (mainly those located in Latin America and Central Asia) through the use of its superior economic power as a guarantee of concession and long-term maintenance of credits and investments to those countries.

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°