Alien Story : Long long ago , a group of math students saved the earth from aliens by using PROPORTIONS ! YAY !
Okay , so I think the homework was to use proportions to stop alien's from invading earth by taking 3 questions from pages 67, 68, and 69 , so here I go !
Page 67 , Question 5:
5. What is the unit rate in each?
a) Two pens cost 94¢.
b) Four blocks stacked one on top of
the other are 24 cm high.
Page 67 , Question 9
9. Determine the missing value to make each
rate equivalent. Include the units.
Page 68 , Question 16
A gardener takes a half hour to mow and
weed a lawn that measures 20 m by 15 m.
He charges $25 per hour. How much
should the gardener receive for a lawn that
measures 40 m by 30 m?
He will earn $25 because if it takes him half an hour ( 30 minutes ) to do 20m by 15m it will take him 1 hour to do 40m by 30m because 20m x 2 = 40m and 15m x 2 = 30m .
Hope you like it !
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