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Mathematics, 21.11.2020 01:00, ayoismeisalex
During a tennis match Alice got of her first serves in. She served a total of 75
times. How many of her first serves did Alice get in?
A
50
B
55
с
70
D
60
![answer](/tpl/images/cats/otvet.png)
Answers: 3
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Mathematics, 22.06.2019 01:00, SpeechlessZzz9920
For every corresponding pair of cross sections, the area of the cross section of a sphere with radius r is equal to the area of the cross section of a cylinder with radius and height 2r minus the volume of two cones, each with a radius and height of r. a cross section of the sphere is and a cross section of the cylinder minus the cones, taken parallel to the base of cylinder, is the volume of the cylinder with radius r and height 2r is and the volume of each cone with radius r and height r is 1/3 pie r^3. so the volume of the cylinder minus the two cones is therefore, the volume of the cylinder is 4/3pie r^3 by cavalieri's principle. (fill in options are: r/2- r- 2r- an annulus- a circle -1/3pier^3- 2/3pier^3- 4/3pier^3- 5/3pier^3- 2pier^3- 4pier^3)
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Mathematics, 22.06.2019 03:00, Santos7446
In a class of 77, there are 44 students who play soccer. if the teacher chooses 33 students, what is the probability that none of the three of them play soccer?
Answers: 2
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During a tennis match Alice got of her first serves in. She served a total of 75
times. How many of...
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