Answer:
The sector given in the figure is a semi-circle because the degree measure of the chord is 180 degrees.
Area of semicircle = 0.5π = 0.5π×4.5 = 6.75 sq. inches
Its 5th grade work and its not long
2 answers:
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Answer:
h greater-than-or-equal-to negative 432
Step-by-step explanation:
* multiply each side by -24 *
IMPORTANT NOTE: when multiplying an inequality by a negative number you must flip the sign. So if the inequality sign was once facing the constant ( 18 ) then it will flip and face the variable ( h )
Thus,
h ≥-432
Which can also be expressed as h is greater than or equal to negative 432
Extra notes: You only have to flip the inequality sign if it's being multiplied by a negative number. Meaning if its multiplied by a positive number then the inequality sign does not flip.
Answer:
(C) α + β + γ
Step-by-step explanation:
The sum of interior angles of ΔOCB & ΔOCA = 180° x 2 = 360°
α + β + γ + (360°-x) = 360°
x = α + β + γ
Answer:
The 99% confidence interval for the 1999 mean incomes of Middletown householders is ($33,013.5, $33,892.5).
Step-by-step explanation:
Of the 40,000 persons, 2621 householders reported their income.
The sample size of the study is, <em>n</em> = 2621.
As the sample size is large, i.e. <em>n</em> > 30 use <em>z</em>-distribution to compute the confidence interval.
The confidence interval for mean is:
The mean of this sample is,
The standard deviation is,
The critical value of <em>z</em> for 99% confidence level is:
The 99% confidence interval for the 1999 mean incomes of Middletown householders is:
Thus, the 99% confidence interval for the 1999 mean incomes of Middletown householders is ($33,013.5, $33,892.5).