Marya plans to participate in a 20 km walk-a-thon. To prepare, she walked 4 km on Monday. She plans to increase her walk by 2 km
each week until she reaches 20 km.
Marya’s calculations:
The equation representing Marya’s calculations is . How many weeks will it take Marya to reach her goal of a 20 kilometer walk?
891012
Marya’s calculations:
The equation representing Marya’s calculations is . How many weeks will it take Marya to reach her goal of a 20 kilometer walk?
891012
2 answers:
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Answer:
.
Step-by-step explanation:
It is given that a number, x, rounded to 2 significant figures is 1300.
It is possible if,
1. The value of x is greater than of equal to 1250 and less than or equal to 1300.
i.e., ...(1)
2. The value of x is greater than of equal to 1300 and less than 1350.
i.e., ...(2)
On combining (1) and (2), we get
1350 is not included in the error interval for x.
Interval notation is .
Therefore, the error interval for x is .
d ( f o c) / dt = 9
( solution is attached below)
