Please help me Functions f: R - > R and g: R -> R are specified by the following rules:

fx=x3 and gx={3x-1, if x ≥0 -x , if x<0
Find f∘g and g∘f if they are defined.
Explain why if it is not defined.

Which speed is the fastest (use 1 mile ≈ 1.6 kilometers)? a. 12 miles/hour b. 18 feet/second c. 19 kilometers/hour d. cannot be determined

Question 5 spring semester final exam math evaluate

which of the following sets of data would produce the largest value for an independent-measures t statistic? the two sample means are 10 and 20 with variances of 20 and 25 the two sample means are 10 and 20 with variances of 120 and 125 the two sample means are 10 and 12 with sample variances of 20 and 25 the two sample means are 10 and 12 with variances of 120 and 125