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2 years ago

Which equation can be used to find the surface area of the cylinder?

Mathematics

1 answer:

Verdich [7]2 years ago

4 0

Answer:

S = π( 2(9) + 2(3)(14))

Step-by-step explanation:

Here we are to select which of the options best describe the equation that could be used to find the surface area of the cylinder.

Mathematically,

the surface area of a cylinder can be calculated using the formula

S = 2 π r^2 + 2 π rh

from the question, we have r as d/2 = 6/2 = 3cm and h = 14cm

We plug these two values into the equation above

Thus, we have

S = 2 * π * 3^2 + 2 * π * 3 * 14

S = π( 2(9) + 2(3)(14))

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The sum of a number times 9 and 21 is at most -25.

madreJ [45]

Answer:

x>= -46/9 (x greater than or equal to -46/9)

Step-by-step explanation:

when translating the question, at most means that it is less than or equal to the value being named, therefore the equation is 9x+21<= -25

to begin solving we subtract 21 from both sides and get 9x<=-46

then when we divide by 9 we have to flip the less than sign because we have to flip it if we multiply or divide.

This gives us the answer, x>=-46/9 which does not simplify any further

4 0

2 years ago

PLLLLEEEAAAASSSSSEEEE HELP!

Lana71 [14]

Answer:

see explanation

Step-by-step explanation:

The length of the arc is calculated as

arc = circumference of circle × fraction of circle

= 2πr × $\frac{90}{360}$ ← r = 1

= 2π × $\frac{1}{4}$ = $\frac{\pi }{2}$ ≈ $\frac{3.14}{2}$ = 1.57

8 0

2 years ago

What is the reciprocal of 3 1/8

maw [93]

Answer:

Step-by-step explanation:

because it would be the reciprical of 1/8 which is 8/1 plus 3

5 0

2 years ago

K + a = v + w, for a

san4es73 [151]

Step-by-step explanation:

Solve for a

k + a = v + w

a = v + w - k

Solution → { a = v + w - k }

8 0

2 years ago

Read 2 more answers

How many times smaller is 2 × 10-3 than 4 × 10-2? PLEASE HELP

NNADVOKAT [17]

<h2>The required "option A) 20" is correct.</h2>

Step-by-step explanation:

Let x be the smaller than 4 × $10^{-2}$ .

To find, the number of times smaller is 2 × $10^{-3}$ than 4 × $10^{-2}$ = ?

∴ x = $\dfrac{4\times 10^{-2}}{2\times 10^{-3}}$

= 2 × $10^{-2}$ × $10^{3}$

Using the identity,

$a^{m}=\dfrac{1}{a^{-m}}$

= 2 × $10^{-2+3}$

Using the identity,

$a^{m} \timesa^{n}=a^{m+n}$

= 2 × $10^{1}$

= 2 × 10

= 20

Thus, the required "option A) 20" is correct.

6 0

2 years ago