over a 30 day period , the anount of propane in a tank that stores propane for heating a home decreases from 400 gallons to 214 gallons . what is the average rate of change in the amount of propance?
a.-6.2 gallons per day
b.-6 gallons per day
c.-0.16 gallons per day
d. 6 gallons per day
2006-10-08 10:00:45 · 14 answers · asked by pearl 2 in Science & Mathematics ➔ Mathematics
It's (final amount - initial amount) / time
= (214-400)/30
= -186/30
= -6.2
so it's choice (a).
2006-10-08 10:04:37 · answer #1 · answered by James L 5 · 0⤊ 0⤋
2
2006-10-08 10:14:03 · answer #2 · answered by Anonymous · 0⤊ 0⤋
number of gallons lost = 400 - 214 = 186
average over 30 days = 186/30 = 6.2 gallons/day
answer a
2006-10-08 10:04:23 · answer #3 · answered by sussexpotter 1 · 0⤊ 0⤋
Let
400 = the total amount of Propane
214 The amount of proopayne used
30 day period
- - - - - - - - - - - - - - - - - - - - - - - -
Subtract 214 from 400
400 - 214 = 186 gallons
Divide 186 by 30
186 ÷ 30 = 6.2 gallons per day
The answer is 6.2 gallons used per day
2006-10-08 10:08:05 · answer #4 · answered by SAMUEL D 7 · 0⤊ 0⤋
a. 6.2 gallons / day
First find out the gallon difference
400-240 = 186 gallon difference
Then divide by the number of days
186 / 30 = 6.2 gallons / day
2006-10-08 10:05:02 · answer #5 · answered by Anonymous · 0⤊ 0⤋
a
Because 400-214=186
and 186 divided by 30 equals 6.2
2006-10-08 10:02:07 · answer #6 · answered by bruinfan 7 · 0⤊ 0⤋
400 - 214 = 186
What number divided by 186 = 30 days?
x186 = 30
x = 186 divided by 30
x = 6.2 gallons per day
2006-10-08 10:23:52 · answer #7 · answered by Anonymous · 0⤊ 0⤋
400-214=186
186/30=6.2
answer is... A
2006-10-08 10:06:46 · answer #8 · answered by janellerocks777 2 · 0⤊ 0⤋
It is 400-214=186/30=6.20 gallons
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2006-10-08 10:06:15 · answer #9 · answered by Memory Guru 1 · 0⤊ 0⤋
d. 6 gallons per day
2006-10-08 10:03:07 · answer #10 · answered by Emily S 1 · 0⤊ 1⤋