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2 years ago

Simplify:3×5-1-(2² +6÷2)

Mathematics

2 answers:

ivanzaharov [21]2 years ago

6 0

Answer:

Step-by-step explanation:

shusha [124]2 years ago

6 0

Answer:

Step-by-step explanation:

3×5-1-(2^2+6÷2)

3×5-1-(4+6÷2)

3×5-1-(4+3)

3×5-1-7

15-1-7

14-7

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The volume of the shape

We have a cylinder that is cut into two. Its external radius is 5ft, while its internal radius is 4ft.

External radius = internal radius + thickness

$\begin{gathered} \text{External radius = 4ft + 1ft } \\ =\text{ 5ft} \end{gathered}$

Internal radius = 4ft (given)

Recall that the volume(V) of a full cylinder is:

$V\text{ = }\pi r^2h$

Since the cylinder is cut into two, the volume(V) is:

$V\text{ = }\frac{\pi r^2h}{2}$

height (h) = 12ft (given)

The volume of the shape:

$\begin{gathered} =\text{ Volume of cylinder with a radius of 5ft - Volume of cylinder with a radius of 4ft} \\ =\text{ }\frac{\pi\text{ }\times5^2\text{ }\times\text{ 12}}{2}\text{ - }\frac{\pi\text{ }\times4^2\text{ }\times\text{ 12}}{2} \\ =\text{ 471.239 - }301.593 \\ =169.65ft^3 \end{gathered}$

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6 months ago

What number is a factor of 12,but not a multiple of 3

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There are 3 numbers as such.
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1,2,3,4,6,12
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3,6 and 12 are multiples of 3
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1,2 and 4

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3 years ago

Read 2 more answers

Simplify:3×5-1-(2² +6÷2)​

Simplify:3×5-1-(2² +6÷2)