You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures: 57.9
25.4
19.8
28.3
60.7
39.4
51.1
63.4

Find the 99% confidence interval. Enter your answer as an open-interval (i. e., parentheses) accurate to two decimal places (because the sample data are reported accurate to one decimal place).

(If you could please show step by step, that would be very helpful!)

1. 22

2. 1

3. 7

4. 18

step-by-step explanation

e2020 got it right

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

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step-by-step explanation: vsfdvsfvd