Mathematics, 30.11.2020 17:20 tinalmath
The mean length of a cellular telephone call in 1999 was 2.38 minutes. A researcher claims that the average length of a phone call has increased since then. She conducts a survey of randomly selected 49 cellular phone users and determines the mean length to be 2.48 minutes, and standard deviation 1.8 minutes. To test the claim we would use:
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Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)
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An arithmetic series a consists of consecutive integers that are multiples of 4 what is the sum of the first 9 terms of this sequence if the first term is 0
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Given the quadratic function f(x)=3x^2-24x+49 a. use “completing the squares” to convert the quadratic function into vertex form b. state the vertex c. find the x and y intercepts d. graph the function
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