I think you are correct, but It may is “Son las tres y cuarenta y cinco” or “ Son quince para las cuatro”
Answer:What is the structure of this text and what type of text is it?
The seventeenth century saw the end of the great epidemics of hunger that had periodically threatened the European population in the preceding centuries, and the nineteenth century signified a revolutionary change in medicine - sepsis, vaccines, anesthesia, etc. - whose social applications - hygiene , compulsory vaccination, etc. - determined a rapid drop in the mortality rate, especially infant mortality. The joint action of both factors caused a revolutionary change in the demographic structure of the old continent. The decrease in mortality in the first years decisively increased the percentage of the population reaching reproductive age, and the reduction in that of adults favored the prolongation of the half-life, with the consequent aging of the populations.
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