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2 years ago

Find the surface area of a 7.4 cm long iron rod and 3.1 m radius

Mathematics

1 answer:

Debora [2.8K]2 years ago

3 0

Answer:

144.2 cm

Step-by-step explanation:

Length of the iron rod is 7.4cm

Radius is 3.1m

Therefore the surface area can be calculated as follows

= 2πrl

= 2×3.142×3.1×7.4

= 144.2 I'm

Hence the surface area is 144.2cm

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Seven less than one half of x

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Answer:

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Step-by-step explanation:

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3 years ago

Triangle X Y Z is shown. Line Z X is extended through point W to form exterior angle W X Y.

Y_Kistochka [10]

Answer:

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Step-by-step explanation:

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3 years ago

Find the equation for the plane that contains the line x=−1+3t , y=1+2t, z=2+4t and is perpendicular to the plane containing the

Ivan

Let $L$ be the line given by the vector equation

$(-1,1,2) + \lambda(3,2,4) \ , \lambda \in \mathbb{R}$ .

First, we use the director vectors of the lines L1 and L2 to get the

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$\\\\\Pi_1 : (1,-1,5) + \alpha (2,-1,6) + \beta (1,1,-3) \ , \alpha, \beta \in \mathbb{R}\\\\\\$

We observe that $\vec{N} = (2,-1,6)\times(1,1,-3) = (-3,12,3) \ne (0,0,0)$ . Therefore, the vector equation of $\Pi_1$ defines a plane and $\vec{N}$ is a normal vector to $\Pi_1.$

Finally, the vector equation for the wanted plane, which we denote by $\Pi$ , is

$\Pi : (-1,1,2) + r(3,2,4) + s(-3,12,3), r,s \in \mathbb{R} \ .$

Thus, if $s = 0$ , then $L \subset \Pi$ and since $\vec{N}$ is parallel to $\Pi$ , then it is perpendicular to $\Pi_1$ .

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3 years ago

A blank describes a characteristic of a population

Ganezh [65]

Answer:

I think it would be a <em>#Number</em>

Step-by-step explanation:

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3 years ago

sattari [20]

Answer:

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Step-by-step explanation:

A = P (1 + [ r / n ]) ^ nt

A = 175000(1 + $\frac{.05}{1}$ )^1(2002-1996)

= 175000(1.05)^6

= 175000(1.340095640625)

= 234,516.7371

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3 years ago