You receive a gift card for trading cards from a local store. The function d = 20 – 1.95c
represents the remaining dollars d on the gift card
after obtaining c packages of cards. Find the zero of
this function. Describe what this value means in this
context

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