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3 years ago

What is the surface area of a right rectangular prism whose dimensions are 3 feet by 6 feet by 8 feet?

Mathematics

2 answers:

Vlad1618 [11]3 years ago

8 0

Answer:

Is B/144

Step-by-step explanation:

All you have to do is length x width x height. or multiply all those numbers together.

mr_godi [17]3 years ago

7 0

Answer:

D) 180 square feet

Step-by-step explanation:

The general formula for the surface area of a rectangular prism is:

SA = 2(ab) + 2(ac) + 2(bc), where 'a', 'b' and 'c' are the side lengths of the prism

Given 3 feet by 6 feet by 8 feet:

a = 3

b = 6

c = 8

SA = 2(3*6) + 2(3*8) + 2(6*8) = 36 + 48 + 96 = 180 square feet

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Genrish500 [490]

Answer:

width = 2 units

Step-by-step explanation:

If the length of a rectangle is (x) units, then that means that the width of a rectangle is x - 4 units.

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so just substitute the values that we have now.

x (length) * (x-4) width = 12 (area of rectangle)

so that gives us

x^2 - 4x =12

subtract 12 from both sides

x^2 - 4x - 12 =0

now factor this equation

x^2 + 2x - 6x -12 = 0

x(x+2) - 6(x+2) = 0

(x-6)(x+2) = 0

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3 years ago

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Answer:

Step-by-step explanation:

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3 years ago

Given the arithmetic sequence: u(1)= 124, u(2)= 117, u(3)= 110, u(4)=103,...

omeli [17]

We are given

arithmetic sequence: u(1)= 124, u(2)= 117, u(3)= 110, u(4)=103

so, first term is 124

u(1)= 124

now, we can find common difference

$d=u(2)-u(1)$

$d=117-124$

$d=-7$

now, we can find kth term

$u(k)=u(1)+(k-1)d$

now, we can plug values

and we get

$u(k)=124+(k-1)*-7$

$u(k)=124-7k+7$

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u(k) must be negative

so,

$u(k)=131-7k$

$131-7k$

now, we can solve for k

$7k>131$

$k>18.714$

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3 years ago

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Answer:

Option 2 (B)

Step-by-step explanation:

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