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jenyasd209 [6]
2 years ago
12

Find the area and the circumference of the circle. Round your answers to the nearest hundredth. PLEASE SHOW WORK

Mathematics
1 answer:
larisa [96]2 years ago
8 0

27/2=13.5(radius)

area: pi*r*r=

pi*13.5*13.5=

572.55526

rounded, 572.56

circumference: 2*pi*r(which is basically diameter times pi)

27pi=84.823

rounded, 84.82

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raketka [301]

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iii. The data do not provide sufficient evidence to conclude that the mean number of minutes exercised per week is larger for men than for women at this gym

Step-by-step explanation:

1) The hypotheses are

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The men spend less or equal time than the women  at the gym each week

vs

the men  spend greater time  than the women at the gym each week

2) The test statistic is

t= (x1`- x2`) / √ s1²/n1+ s2²/n2

t= 65.7- 64.8/√(13.9)²/75 + (9.6)²/68

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=[(13.9)²/75 + (9.6)²/68]²/ [(13.9)²/75 ]² /74 + [ (9.6)²/68]²/67

= 139

The degrees of freedom is always rounded in this calculation

4) The Critical region is [1.656, ∞]

5) t-score is outside of the critical region, so there is not enough evidence to reject H₀.

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