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romanna [79]
2 years ago
9

In 1989 a postage stamp cost $.25. In 1999 a postage stamp cost $.33. Find the average rate of

Mathematics
2 answers:
zalisa [80]2 years ago
7 0

Answer:

0.33-0.25= 0.08

then 1999-1989= 10

lastly 0.008

Step-by-step explanation: so the  average rate of

change in postage in<em><u> cents</u></em> per year. is 0.8 of a cent. or 0.008 of a dollar.

Mrac [35]2 years ago
6 0
I’m pretty sure it is 80 cents, because it changed by 8 cents in 10 years so you’re supposed to divide 8 by 10 and get .8 which is equivalent to 80 cents
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Step-by-step explanation:

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