A company tests the life of its rechargeable batteries over six months of use. They test how long a battery will last after a fu ll charge and put the data into a scatter plot. On the best-fit line y=-12.05+224.26 about how many months will a typical battery last before it is completely dead? Round your answer to the nearest tenth of a month.
1 answer:
Answer:
18.6 months
Step-by-step explanation:
Given that :
Best fit line from scatterplot :
y=-12.05x +224.26
x = Number of month
y = charge on battery
Number of months a typical battery uses before being dead completely :
When battery is dead completely ; charge =0, y = 0
y = -12.05x + 224.26
0 = - 12.05x + 224.26
12.05x = 224.26
x = 224.26 / 12.05
x = 18.610788
Hence, 18.6 months before battery is completely dead.
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Hope that helps!
Step-by-step explanation:
Caiden's balance after 5 years would be $831
<u>Explanation: </u>
Given:
Principal, p = $475
Rate of interest = 3.8%
time, t = 15 years
Balance after 15 years = ?
We know:
where,
n = number of compounding periods
r = rate of interest
t = number of years
Substituting the value;
Therefore, Caiden's balance after 5 years would be $831
