100 points for answer. please help
2 answers:
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Answer:
a
The percentage is
b
The probability is
Step-by-step explanation:
From the question we are told that
The population mean is
The variance is
The range consider is
The value consider in second question is
Generally the standard deviation is mathematically represented as
substituting value
The percentage of a cucumber give the crop amount between 778 and 834 kg is mathematically represented as
Generally
So
From the z-table the value for
and
So
The percentage is
The probability of cucumber give the crop exceed 900 kg is mathematically represented as
substituting values
From the z-table the value for
We are given, cost of the robot for 0 number of year = $16,000.
0 represents initial time of the robot.
After 10 year cost of the robot is = $0
The problem is about the number of the years and cost of the robot over different number of years.
So, we could take x coordinate by number of hours and y coordinate for y number of hours.
So, from the problem, we could make two coordinates for the given situation.
(x1,y1) = (0, 16000) and (x2,y2) = (10, 0).
In order to find the function of time, we need to find the rate at which robot rate depreciates each year.
Slope is the rate of change.
So, we need to find the slope of the two coordinates we wrote above.
We know, slope formula
Plugging values in formula, we get
Brecasue of depreciation we got a negative number for slope or rate of change.
Therefore, rate of depreciation is $1600 per year.
We already given inital cost, that is $16,000.
So, we can setup an a function
f(x) = -1600x + 16000.
But the problem is asked to take the variable t for time.
Replacing x by t, we get
f(t) = -1600t + 16000.