Applications
jared and pedro walic i mile in about 15 minutes. they can keep op
this pace for several hours.
a. about how far can they walk in 30 minutes?
b. about how far can they walk in 5 minutes? !
swimming of a mile uses about the same number of calories as
running i mile.
a. gilda ran a 25 milo marathon. about how far would her sister
have to swim to use the same number of calories gilda used
during the marathon?
b. juan swims 5 miles a day. about how many miles would he have
to run to use the same number of calories used during his swim?
after testing many samples, an electric company determined
that approximately 2 of every 1,000 light bulbs on the market are
defective. americans buy more than 1 billion light bulbs every year.
estimate how many of these bulbs are defective.
the organizers of an environmental conference order buttons for
the participants. they pay $18 for 12 dozen buttons. write and
solve proportions to answer each question. assume that price is
proportional to the size of the order.
a. how much do 4 dozen buttons cost?
b. how much do 50 dozen buttons cost?
c. how many dozens of buttons can the organizers buy for $27?
d. how many dozens of buttons can the organizers buy for $63?