A) At a temperature of 27 ?C, what is the speed of longitudinal waves in hydrogen (molar mass 2.02 g/mol)? The ratio of heat capacities for hydrogen is ?=1.41.

B) At a temperature of 27 ?C, what is the speed of longitudinal waves in helium (molar mass 4.00 g/mol)? The ratio of heat capacities for helium is ?=1.67.

C)

At a temperature of 27 ?C, what is the speed of longitudinal waves in argon (molar mass 39.9 g/mol)? The ratio of heat capacities for argon is ?=1.67.

D,E, F i need help please and show work please

D)Compare your answer for part A with the speed in air at the same temperature. The ratio of heat capacities for air is ?=1.40.

E)Compare your answer for part B with the speed in air at the same temperature. The ratio of heat capacities for air is ?=1.40.

F)Compare your answer for part C with the speed in air at the same temperature. The ratio of heat capacities for air is ?=1.40.

How do I do  independent t test on the data set below and how do I know if its pooled t test or unrolled t test?

Health question for reference: to what extend does the age of MI patients vary by gender

Standard deviation: male = 13.944 female= 13.939

mean: male 65.353 female=73.628

Male female

65   88
77   81
78   82
76   66
40   81
83   73
58   64
43   53
39   69
66   67
61   89
49   85
85   81
54   85
82   84
68   83
78   76
56   77
72   84
50   43
75   87
61   70
48   64
82   59
62   91
39   60
45   80
65   72
68   73
73   85
64   80
80   79
74   48
80   32
92   86
51
41
90
83
61
64   
82
48
63
81
52   
65   
74
62
71
73
43
80
72
57
76
53
44
71
64
86
60
63
74
56

Joseph Company operates three divisions, X, Y, and Z. The following
information is available for the most recent month:

Joseph Company:
Sales revenue .............. $700,000
Segment margin ............. $239,000
Net income ................. $125,000

Division X:
Sales revenue .............. $200,000
Contribution margin ........ $140,000
Segment margin ............. $109,000

Division Y:
Variable costs ............. 70% of sales

Division Z:
Variable costs ............. $118,000
Traceable fixed costs ...... $ 56,000
Contribution margin ........ 60% of sales

Calculate the total fixed costs incurred by Joseph Company during
the most recent month.

Please label the answer as answer=-----------

Mel's male accessories sells wallets and money clips. Historically the firms sales have averaged three wallets for every money clip. Each wallet has an R80 contribution margin and each money clip has a R60 contribution margin. Mel's incurs fixed costs in the amount of R180000. The selling prices of wallets and money clips, respectively, are R200 and R150. The firms tax rate is 40%.

Required :
a. How much revenue is needed to break even and how many wallets and money clips does this present.
b. How much revenue is needed to earn an operating income of R150000?

ABC Company has three divisions, J, P, and W. The following
information is available for the most recent month:

ABC Company:
Sales revenue .............. $513,000
Total fixed costs .......... $125,320
Net income ................. $ 57,300

Division J:
Sales revenue .............. $163,000
Segment margin ............. $ 20,810

Division P:
Contribution margin ........ $ 30,150
Traceable fixed costs ...... $ 14,270
Variable cost ratio ........    85% of sales in Division P

Division W:
Variable costs ............. $ 41,720
Segment margin ............. $ 67,370

Calculate the traceable fixed costs reported by Division J
during the most recent month.

ABC Company has three divisions, J, P, and W. The following
information is available for the most recent month:

ABC Company:
Sales revenue .............. $513,000
Total fixed costs .......... $125,320
Net income ................. $ 57,300

Division J:
Sales revenue .............. $163,000
Segment margin ............. $ 20,810

Division P:
Contribution margin ........ $ 30,150
Traceable fixed costs ...... $ 14,270
Variable cost ratio ........    85% of sales in Division P

Division W:
Variable costs ............. $ 41,720
Segment margin ............. $ 67,370

Calculate the traceable fixed costs reported by Division J
during the most recent month.

ABC Company has three divisions, J, P, and W. The following
information is available for the most recent month:

ABC Company:
Sales revenue .............. $513,000
Total fixed costs .......... $125,320
Net income ................. $ 57,300

Division J:
Sales revenue .............. $163,000
Segment margin ............. $ 20,810

Division P:
Contribution margin ........ $ 30,150
Traceable fixed costs ...... $ 14,270
Variable cost ratio ........    85% of sales in Division P

Division W:
Variable costs ............. $ 41,720
Segment margin ............. $ 67,370

Calculate the traceable fixed costs reported by Division J
during the most recent month.

In 2021, the Westgate Construction Company entered into a contract to construct a road for Santa Clara County for $10,000,000. The road was completed in 2023. Information related to the contract is as follows:

Westgate recognizes revenue over time according to percentage of completion.

Required:
1. Calculate the amount of revenue and gross profit (loss) to be recognized in each of the three years.

Sweet Bakery sells pastries and cupcakes. Usually, for every three pastries they sell one cupcake (which means, pastries : cupcake = 3:1). Each pastry has an BDT80 contribution margin, and each cupcake has a BDT60 contribution margin. Sweet Bakery’s fixed costs are BDT180,000 per month. The selling prices of pastries and cupcakes, respectively, are BDT300 and BDT150. The business is subjected to a 40 percent income tax rate.

1. How much revenue is needed to earn a pre-tax profit of BDT150,000?

2.  How much revenue is needed to earn an after-tax profit of BDT150,000?

Please make a comparative analysis in 250 words for both companies over three years. Make sure the analysis goes into reason for the changes and sounds professional.