Answer:
h = 46
Step-by-step explanation:
-18 + h = 28
Add 18 to each side
-18+18 + h = 28+18
h =46
Answer:
Step-by-step explanation:
The temp is 100 at time t = 0
After 1 sec, the temp difference would be:
After 2 sec, the temp difference would be:
Similarly for 3 seconds, 4 seconds etc.
We notice that the parenthesis part is 40% of it, so we can also write:
100(40%)^t,
where
t is the time
40% can be written as 40/100 = 0.4
SO, the function is:
pool has 45000 gallons. It loses 780 gallons per hour, so the amount at any given time:
45000 - 780h, where h is the number of hours.
The chemical could be added once the amount of gallons in the pool hits 15000. So the equation to solve:
45000 - 780h = 15000
solve:
30000 = 780h
38.46 = h
It will take about 38.46 hours before chemical could be added. It will not take longer than 2 days because 2 days is 48 hours, and we only need about 38 hours.
Its "C" because without oxygen you can't have fire
12/84 = 1/7 ≈ 0.14
The discount rate was 14%
