HELP The perimeters of a square and a rectangle are equal . One side of the rectangle is 11 cm and the area of the square is 4 cm² more than the area of the rectangle. Find the side of the square.
with explanation please ♡​

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