A bakery buys a new spool containing 3,200 yards of twine. After several months 11/16 of the 3200 yards of
the twine on the spool remains. If $4.00 worth of twine was used in this period, what is the cost of 500 yards of twine?
I need an answer ASAP!!

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