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3 years ago

Find the surface area of the cylinder.

Mathematics

2 answers:

Charra [1.4K]3 years ago

8 0

Answer:

A≈552.92

Step-by-step explanation:

A=2πrh+2πr^2 - that is the equation we have to use - for surface area, not area.

Since we are given the radius (r) and height (h) we can just plug things in...

A = 2(3.14)(8cm)(3cm)+(2)(3.14)(8cm)(2)^2 = A≈552.92

Naya [18.7K]3 years ago

4 0

Area= LxW

So 8x3= 24!!!

Hope this helps

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Suppose a town wants to design two landfills shaped as a cone and a cylinder. The base diameter and the volume of both designs w

Sliva [168]

Answer:

Step-by-step explanation:

Although I,m not completely sure, I do know that a cone and cylinder will not have the same volume if the base is the same. To back that up a cone is 1/3 of a cylinder of the same diameter.

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3 years ago

I WILL MARK BRAINLIEST!!! !! (picture included with ONE question ^^^^^) only part a

Taya2010 [7]

Answer:

A. y = 1.5m + 7

B. at 7 months the baby will weigh 17.5 pounds

C. Since the baby is born weighing 7 pounds, at 0 months he will weigh 7 pounds. This tells us that the y-intercept will be seven. And since the baby is gaining 1.5 pounds every month, this means that the slope will be 1.5 and m will be the x of our y = mx + b equation. For part B, we simply plug in 7 to m and solve by multiplying 1.5 and 7 to get 10.5, then adding 7 to get 17.5.

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3 years ago

Round 18.049 to the nearest tenth.

kirill115 [55]

Answer:

18.0

Step-by-step explanation:

Note the tenth place value (underlined and bolded): 18.049

Look at the number to the direct right of the tenth place value (or the hundredth place value in this case). It is a 4.

Note the rules of rounding. If the number:

1) is 5 or greater, round up.

2) is 4 or less, round down.

In this case, it is 4, so you will round down.

18.049 rounded to the nearest tenth is 18.0

4 0

3 years ago

Read 2 more answers

A rectangular tank has length 4m, width 12m and height 3.5..i. If the tank is filled with water 2/3 of its capacity ,calculate t

ipn [44]

Answer:

The volume of the water in the tank is 112 m³

Step-by-step explanation:

The volume of the rectangular prism V = L × W × H, where

L is its length

W is its width

H is its height

∵ A rectangular tank has a length of 4 m, a width of 12 m, and

a height of 3.5 m

∴ L = 4 m

∴ W = 12 m

∴ H = 3.5 m

∵ V = L × W × H

∴ The volume of the tank = 4 × 12 × 3.5

∴ The volume of the tank = 168 m³

∵ The tank is filled with water $\frac{2}{3}$ of its capacity

→ That means the volume of the water is $\frac{2}{3}$ the volume of the tank

∵ The volume of the water = $\frac{2}{3}$ the volume of the tank

∴ The volume of the water = $\frac{2}{3}$ × 168

∴ The volume of the water = 112 m³

∴ The volume of the water in the tank is 112 m³

3 0

3 years ago

The last customer of the day calls telling you they purchased 96 meters of fencing to fence in a

Lilit [14]

Answer:

Area = 733 m² (to the nearest meter)

Step-by-step explanation:

Formulae

Circumference of a circle = 2 $\pi$ r
Area of a circle = $\pi$ r²

(where r is the radius of the circle)

Find the radius

circumference = 96 m

Using the circumference of a circle formula:

⇒ 2 $\pi$ r = 96

⇒ $\pi$ r = 96 ÷ 2 = 48

⇒ r = 48 ÷ $\pi$ = 48/ $\pi$

Find the area

radius r = 48/ $\pi$

Using the area of a circle formula:

⇒ A = $\pi$ r²

⇒ A = $\pi$ (48/ $\pi$ )²

⇒ A = 2304/ $\pi$

⇒ A = 733.3859778...

⇒ A = 733 m² (to the nearest meter)

6 0

3 years ago