QUESTION 1a) The loudness of sound is measured in decib

QUESTION 1a) The loudness of sound is measured in decibel units and is defined by where I is the given intensity and ( in unit) is the intensity of sound at the threshold of hearing. i. Find the decibel rating of a sound with intensity 5000 I0. ii. If a sound has a decibel rating of 85 how much more intense is it than the threshold sound? QUESTION 2 A group of 35 secondary school students are allowed to choose their favourite subjects from a list of subjects which is Anthropology (A) Biology (B) and Chemistry (C). Three students did not choose any subject. The following table shows the number of students who chose at least one subject.Number of students Subject chosen 17 A 21 C 15 B 9 A and C 11 B and C 10 A and B Represent the above information in a Venn diagram.Calculate the number of students who chose all three subjects.How many students chose Anthropology only?Determine the number of students who have two favourite subjects. __________________________________________________-_____________________
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