The area of a circle is 113.1 ft2 . What would the diameter have to be ? i need help ASAP!
2 answers:
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Answer:
The second choice, .
Step-by-step explanation:
Note, that the expression is an equation. A point
is on the graph of
if and only if the value of
and
satisfy this equation; that is: in other words, the
-coordinate of that point (the second number in the tuple) should be equal to
, which is equal to
(evaluated where
is equal to the first number in the tuple.
For each tuple in the choices, calculate the value of where
is equal to the first number of each tuple. Compare the result to the second number in that tuple. That choice corresponds to a valid point on
only if these two numbers match.
- First choice:
,
. That's not the same as the second number,
. Therefore, this point isn't on the graph of
.
- Second choice:
,
. That matches the second number in the tuple. Therefore, this point is on the graph of
- Third choice:
,
. That's not the same as the second number,
. Therefore, this point isn't on the graph of
- Fourth choice:
,
. That's not the same as the second number,
. Therefore, this point isn't on the graph of
Answer:
27% of the possible Z values are greater than 0.613
Step-by-step explanation:
When the distribution is normal, we use the z-score formula.
In a set with mean and standard deviation
, the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this question, we have that:
27% of the possible Z values are greater than
The 100 - 27 = 73rd percentile, which is X when Z has a pvalue of 0.73. So X when the z-score is 0.613.
27% of the possible Z values are greater than 0.613