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Bad White [126]
3 years ago
6

Work out the surface area of this cylinder 8.2 cm 17.5 cm

Mathematics
2 answers:
ANTONII [103]3 years ago
5 0

Answer: 1324.12 sq. cm.

Step-by-step explanation:

A=2πrh+2πr2

A = 2π x 8.2 x 17.5 + 2π x 8.2^2

A = 2π x 143.50 + 2π x 67.24

A= 1324.12

MAVERICK [17]3 years ago
5 0

Answer:

SA = 1324.1 cm²

Step-by-step explanation:

Surface Area of Cylinder = 2\pi rh+2\pi r^2

<u><em>Where r = 8.2 cm, h = 17.5 cm</em></u>

=> SA = 2(3.14)(8.2)(17.5)+2(3.14)(8.2)^2

=> SA = 901.6+2(3.14)(67.24)

=> SA = 901.6 + 422.5

=> SA = 1324.1 cm²

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3 years ago
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Free_Kalibri [48]

Answer:

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Step-by-step explanation:

Given the data:

29; 37; 38; 40; 58; 67; 68; 69; 76; 86; 87; 95; 96; 96; 99; 106; 112; 127; 145; 150

The sample variance and standard deviation can be obtained thus :

Σ(X - m)² / (n - 1)

Where, m = mean of the sample

n = sample size

The standard deviation equals, sqrt(variance )

Using a calculator:

The variance, σ² ;

Mean = Σx / n = 1681 / 20 = 84.05

(x -m)^2

[(29-84.05)^2 + (37-84.05)^2 + (38-84.05)^2 + (40-84.05)^2 + (58-84.05)^2 + (67-84.05)^2 + (68-84.05)^2 + (69-84.05)^2 + (76-84.05)^2 + (86-84.05)^2 + (87-84.05)^2 + (95-84.05)^2 + (96-84.05)^2 + (96-84.05)^2 + (99-84.05)^2 + (106-84.05)^2 + (112-84.05)^2 + (127-84.05)^2 + (145-84.05)^2 + (150-84.05)^2] / 19

22636.95 / 19

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Standard deviation = sqrt( Variance)

Standard deviation = sqrt(1191.4184)

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4 0
3 years ago
Workers on the assembly line produce 4x + 6 boats each day. Which expression shows how many boats they produced in 12 days?
Annette [7]
We're going to assume that x = # of days.
Plug 12 in as x:
4 × 12 = 48
48 + 6 = 54
They produced 54 boats in 12 days.
7 0
3 years ago
Read 2 more answers
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