ABCD is a rhombus. Opposite sides are parallel. a
А
B
E
b
Not drawn
accurately
D
F
С
BE is an extension of AB, such that AB : BE = 4:3
The point F is halfway along CD
Find FE in terms of a and b.

Astudy claims that the mean age of online dating service users is 40 years. some researchers think this is not accurate and want to show that the mean age is not 40 years. identify the null hypothesis, h0, and the alternative hypothesis, ha, in terms of the parameter μ. select the correct answer below: h0: μ≥40; ha: μ< 40 h0: μ≤40; ha: μ> 40 h0: μ≠40; ha: μ=40 h0: μ=40; ha: μ≠40