Answer:
89
Step-by-step explanation:
we evaluate when t=2
so it's 89 feet
Solve: 1.2n+1=1-n HELP PLS ASAP WILL GIVE BRAINLIEST IF CORRECT
1 answer:
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Step-by-step explanation:
Take a look at the picture, And tell me if am wrong
Answer:
Standard deviation of a normal data distribution is a measure of data dispersion.
Step-by-step explanation:
Standard deviation is used to measure dispersion which is present around the mean data.
The value of standard deviation will never be negative.
The greater the spread, the greater the standard deviation.
Steps-
1. At first, the mean value should be discovered.
2.Then find out the square of it's distance to mean value.
3.Then total the values
4.Then divide the number of data point.
5.the square root have to be taken.
Formula-
SD=
Advantage-
It is used to measure dispersion when mean is used as measure of central tendency.
Answer:
The speed of the boat is 20 km/hr
Step-by-step explanation:
Let s be the speed of boat in still water
Let d be the distance
Upstream speed = s-4
Jane took 30 min to drive her boat upstream to water-ski at her favorite spot.
So, Distance traveled in upstream =
Downstream speed = s+4
So, Distance traveled in downstream =
So,
30s-120=20s+80
10s=200
s=20
Hence The speed of the boat is 20 km/hr