(a)[3]
Calculate how much change she gets from $20.
(b)[1]
Calculate the time she gets off the bus.
(c)[2]
Show that she needs at least 3 bottles to have enough milk for 7 days.
(d)[2]
Calculate how many phones she sells.
(e)[2]
Calculate how many phones she sells in 2023.
(f)[2]
State which country has the lower price and by how many dollars.