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3 years ago

Good afternoon guys! Can anyone help me with this?

Mathematics

1 answer:

Vitek1552 [10]3 years ago

8 0

Answer: Attach the file with youre work and if it says sorry someone else is working on this post another question

Step-by-step explanation:

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PLEASE HELP! Here's my word problem; A rectangular riding arena is 45 meters long. The stables are 10 meters wide and 26.6 meter

Pavlova-9 [17]

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3 years ago

How to do this question -14=k-4

Furkat [3]

Answer: hope this helps .

Step-by-step explanation:

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3 years ago

What is 4/4 as a decimal

Marina86 [1]

Answer:

4/4 as a decimal is 1.00 because 4/4 is one whole

Step-by-step explanation:

6 0

4 years ago

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This year, Carmen watched 70 movies. She thought that 21 of them were very good. Of the movies she watched, what percentage did

spin [16.1K]

Carmen thought 30% of the movies were good.

I found the percent by dividing 21 by 70

21/70= .3

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8 0

4 years ago

Work out the surface area of a cylinder when the height = 18cm and the volume = 1715cm cubed

lara [203]

Answer:

813.4 cm² (nearest tenth)

Step-by-step explanation:

Volume of a cylinder

$\sf V=\pi r^2 h \quad\textsf{(where r is the radius and h is the height)}$

Given:

h = 18cm
V = 1715 cm³

Use the Volume of a Cylinder formula and the given values to find the radius of the cylinder:

$\implies \sf 1715=\pi r^2 (18)$

$\implies \sf r^2=\dfrac{1715}{18 \pi}$

$\implies \sf r=\sqrt{\dfrac{1715}{18 \pi}$

Surface Area of a Cylinder

$\sf SA=2 \pi r^2 + 2 \pi r h \quad\textsf{(where r is the radius and h is the height)}$

Substitute the given value of h and the found value of r into the formula and solve for SA:

$\implies \sf SA=2 \pi \left(\sqrt{\dfrac{1715}{18 \pi}\right)^2 + 2 \pi \left(\sqrt{\dfrac{1715}{18 \pi}\right)(18)$

$\implies \sf SA=2 \pi \left(\dfrac{1715}{18 \pi} \right) + 36 \pi \left(\sqrt{\dfrac{1715}{18 \pi}\right)$

$\implies \sf SA=\dfrac{1715}{9} + 36 \pi \left(\sqrt{\dfrac{1715}{18 \pi}\right)$

$\implies \sf SA=813.3908956...$

Therefore, the surface area of the cylinder is 813.4 cm² (nearest tenth)

8 0

2 years ago

Read 2 more answers