Mathematics, 20.10.2019 21:30 kayleenprmartinez100

Ineed the surface area of this figure. tell the answer with working.

Answers: 2

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Answers

Surface area of the half-sphere:
= 4pi r^2 * 1/2

r = 15 cm
pi = 3.142

= 4 x 3.142 x 15^2 x 1/2
= 2 x 3.142 x 225
= 3.142 x 450
= 1,413.9 cm^2

Curved surface area of the cone:
= pi r L

L = Slant height
= Square root (radius of cone + height of cone)
r = 15 cm
h = 50 - 15
= 35 cm
L = Square root (15^2 + 35^2)
= Square root (225 + 1,225)
= Square root (1450)
= 38.079 cm
A = 3.142 x 15 x 38.079
= 1,794.7 cm^2

Total Surface Area:
= Surface area of the half-sphere + Curved surface area of the cone
= 1,413.9 cm^2 + 1,794.7 cm^2
= 3,208.6 cm^2

Answer from: Quest

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.

Answer from: Quest

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction: this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology: the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion: the last is the discussion, this can be either by management people or persons who are all interested , etc.

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Ineed the surface area of this figure. tell the answer with working.
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