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Answer:
<em>The app's estimate was 38.4 minutes.</em>
Step-by-step explanation:
Suppose, the app's estimated time was minutes.
Given that, it took 48 minutes to drive downtown. So, <u>the error in estimated time by the app</u> minutes.
It is also given that the error was 20%. So, <u>the amount of error</u> minutes.
Thus, the equation will be......
So, the app's estimate was 38.4 minutes.
Answer: the number of terms of the series is 201 numbers
the sum of the first 20 terms is 890
the number of terms of the series is
the series have:
u1 = 5
d = 4
=> u(n) = 5 + 4.(n - 1)
=> u(20) = 5 + 19.4 = 81
so the sum of the first 20 terms is (81 + 5).20/2 = 890
( u1 is the first number of the series, d is the distance between front and rear numbers, u(n) is the overall term of the sequence, u(20) is the 20th of the series)
Step-by-step explanation: