Hello, who can help me with this question and if you can explain each letter to me, a, b, c, please, it would help me a lot. it says:
solve the following operations: a)-3×(4+(-5)×2= b)7×(5×(-2)]= c)4×{(-7)×[(-5)×{(-2)}=
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Which of the following graphs represents the function f(x) = 2^x

The evening newspaper is delivered at a random time between 5: 30 and 6: 30 pm. dinner is at a random time between 6: 00 and 7: 00 pm. each spinner is spun 30 times and the newspaper arrived 19 times before dinner. determine the experimental probability of the newspaper arriving before dinner.

Type the correct answer in each box. spell all the words correctly, and use numerals instead of words for numbers. if necessary, use / for the fraction bar(s).