Here is a question about this article: Electric recording which developed during the time that early radio was becoming popular (1925) benefited from the microphones and amplifiers used in radio studios. The early electric recordings were reminiscent tonally of acoustic recordings, except there was more recorded bass and treble as well as delicate sounds and overtones cut on the records. This was in spite of some carbon microphones used, which had resonances that colored the recorded tone. The double button carbon microphone with stretched diaphragm was a marked improvement. Alternatively, the Wente style condenser microphone used with the Western Electric licensed recording method had a brilliant midrange and was prone to overloading from sibilants in speech, but generally it gave more accurate reproduction than carbon microphones.
What is the answer to this question: What type of microphones were losing popularity in the 1920s?
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So... carbon microphones used,

Here is a question about this article: Public expenditure rose from 10 million in 2001-02 to 12 million in 2005-06 to 28m in 2012-13. The contribution of UK budgetary aid to total SHG government expenditure rose from 4.6 million in to 6.4 million to 12.1 million over the same period. Wages and salaries represent about 38% of recurrent expenditure.
What is the answer to this question: In 2012-2013, public expenditure was what?
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So... 28m

Here is a question about this article: The humoral (antibody) response is defined as the interaction between antibodies and antigens. Antibodies are specific proteins released from a certain class of immune cells known as B lymphocytes, while antigens are defined as anything that elicits the generation of antibodies ("anti"body "gen"erators). Immunology rests on an understanding of the properties of these two biological entities and the cellular response to both.
What is the answer to this question: What are antibodies comprised of?
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So...
specific proteins