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4 years ago

Can someone help me please im confused

Mathematics

1 answer:

Kruka [31]4 years ago

7 0

Interesting, have you tried Wikipedia?

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Find the volume and surface area

kompoz [17]

$\bf \begin{array}{llll} \stackrel{\textit{volume of a cylinder}}{V=\pi r^2 h}\\\\ V=\pi (8)^2(3)\\\\ V=192\pi \\\\ V\approx 603.19 \end{array}~\hfill \begin{array}{llll} \begin{cases} r=radius\\ h=height\\[-0.5em] \hrulefill\\ r=8\\ h=3 \end{cases} \end{array}~\hfill \begin{array}{llll} \stackrel{\textit{surface area of a cylinder}}{SA=2\pi r(h+r)}\\\\ SA=2\pi (8)(3+8)\\\\ SA=16\pi (11)\\\\ SA=176\pi \\\\ SA\approx 552.92 \end{array}$

7 0

3 years ago

What is the volume of the cone to the nearest cubic millimeter? (Use π = 3.14)

rjkz [21]

Answer:

given:

height[h]=8mm

radius [r]=5mm

Now,

Volume of cone=1/3 πr²h=⅓×3.14×5²×8=209mm³

C) 209 mm³ is a required answer.

3 0

3 years ago

Read 2 more answers

Mary ran 2 miles in 23 minutes. If she

MA_775_DIABLO [31]

we have:

2 miles ---------- 23 minutes
15 miles ‐---------- x minutes

So:

$\frac{2}{23} = \frac{15}{x}$

$= > x = \frac{15 \times 23}{2} = \frac{345}{2} = 172.5 \: mins$

$= > x = \frac{172.5}{60} = \frac{23}{8} = 2.875 \: hours$

Answer: 2.875 hours

Ok done. Thank to me :>

4 0

2 years ago

What is the radius, in centimeter, of a circle that has a circumference of 16π centimeters? A. 8 B. 16 C.32 D.6432 D

adelina 88 [10]

Answer:

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

PLEASE HELP

Firdavs [7]

Answer: 2.25 grams

Explanation:

To find the remaining mass of an element, apply the following:

m0 = m/(2^n), where m0 is the remaining mass, m as the original mass and n as the number of half lives that have passed.

we have m, we just have to find n. To find n,

24/6 = 4 half lives have passed.

Applying the first formula,

m0 = (36)/(2^4) = 36/8 = 2.25 grams

Hope this helps, brainliest would be appreciated :)

4 0

3 years ago