3 years ago

At the car show ,Inez saw a car wheel shaped like a circle with a radius of 3ft she wants to know the area?

Mathematics

1 answer:

Tanzania [10]3 years ago

3 0

Answer:

is this a math problem?

Step-by-step explanation:

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The radius of a cylinder is doubled and its height is halved. Find the ratios of their surface areas.

Inessa [10]

Answer: 1:1

Step-by-step explanation:

Let r be the radius and h be the height of a cylinder.

Formula: Curved surface area of cylinder = $2\pi rh$

Now, if radius of a cylinder is doubled and its height is halved, then new radius will be R= 2r and new height will be $H=\dfrac{1}{2}$

Now, new surface area = $2\pi RH= 2\pi(2r)\dfrac{h}{2}= 2\pi rh$

Ratio of curved surface areas : $\dfrac{\text{Surface area}}{\text{New surface area}}=\dfrac{2\pi rh}{2\pi rh}=\dfrac{1}{1}$

Hence, the ratios of their surface areas = 1:1 .

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2 years ago

Find all ratios that are equivalent to 4 : 6 and have a first term that is less than 40.

kherson [118]

Answer:

2: 3, 4: 6, 6: 9, 8: 12 , 10: 15, 12: 18, 14: 21, 16: 24, 18: 27, 20: 30, 22: 33, 24:36, 26: 39, 28: 42, 30: 45, 32: 48, 34: 51, 36: 54, 38: 57

Step-by-step explanation:

The ratio 4: 6 can be simplified to 2:3 by dividing by 2 to each side of the ratio. After simplified to 2:3, you add the ration to itself to get the rest of the terms.

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3 years ago

2 x 10 to the 3rd power standard form

cricket20 [7]

2 x 10 to the 3rd power is
2x10^3

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3 years ago

The steps below show the incomplete solution to find the value of x for the equation 5x − 2x − 3 = −2 + 15: Step 1: 5x − 2x − 3

borishaifa [10]

The next step is 3x = 16

8 0

3 years ago

What is x? <br>1. 2.7( 5.1x + 4.9) = 3.2x + 28.9 <br><br><br>2. 5(11x - 18) = 3(2x + 7)

tatyana61 [14]

Answer:

1. x≈1.4825

2. x≈2.26531

Step-by-step explanation:

6 0

3 years ago

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