A gardener makes a new circular flower bed. The bed is fourteen feet in diameter. Calculate the circumference and the area of th
e circular flower bed.
A. circumference= 14pi feet, area = 196pi square feet
B.circumference = 14
feet, area = 14pi
square feet
C.circumference = 14pi
feet, area = 49pi
square feet
D.circumference = 7pi feet,area= 49pi square feet
A. circumference= 14pi feet, area = 196pi square feet
B.circumference = 14
feet, area = 14pi
square feet
C.circumference = 14pi
feet, area = 49pi
square feet
D.circumference = 7pi feet,area= 49pi square feet
1 answer:
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Answer:
Correct choice is B
Step-by-step explanation:
All given options represent quadratic function. Let the equation of this quadratic function be
Then
1.
2.
3.
Solve the system of two equations:
Then
Thus, the equation of the function is
Note that
Complete Question
The complete qustion is shown on the first uploaded image
Answer:
The correct option is B
Step-by-step explanation:
From the question we are told that
The sample size is
The mean is
The standard deviation is
Generally the standard error of this measurement is mathematically represented as
substituting values
ppb
Now the probability that the mean lead level from the sample of 49 measurements T is less than 15 ppb represented as P(X < 15 )
Next is to find the z value
Now checking the z-table for the z-score of -1 we have
