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2 years ago

A mirror frame in the shape of an oval is shown below. The ends of the frame form semicircles:

Mathematics

1 answer:

Kruka [31]2 years ago

3 0

You need to add up three things:
- two sides of 60" each (60*2=120")
- the perimeter of the upper semicircle (3.14*27/2=42.412")
- the perimeter of the lower semicircle (3.14*27/2=42.412")

After addition:
120+42.412+42.412=204.823"

I hope you got the idea!

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1/4 + 1/3= {Khan Academy btw}

zmey [24]

Answer: $\frac{7}{12}$

Step-by-step explanation:

$\frac{1}{4} +\frac{1}{3}=\frac{(1)(3)+(4)(1)}{(4)(3)} =\frac{3+4}{12} =\frac{7}{12}$

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2 years ago

I need answer for this math problem

tekilochka [14]

Answer:

3h²

Step-by-step explanation:

factor or breakdown 3h² : 3 * h * h

factor or breakdown 3h³ : 3 * h * h * h

Now, we can see that 3 * h * h is common so 3h² is the gcf.

6 0

2 years ago

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Elizabeth is waiting for her flight at the airport. She decides to conduct an experiment. She wants to know how many people at t

Likurg_2 [28]

Answer:

the population is everyone at the airport ,the sample is the 50 people that walked by Elizabeth

7 0

3 years ago

If it takes 5.7 gallons an hour how many cups will it take a minute

tino4ka555 [31]

1 gallon = 16 cups
1 hour = 60 min

16 cups = 60 min
5 gallons =180 min/ 3 hrs

1 cup = 3.75 minutes

4 0

2 years ago

Read 2 more answers

A plane flying horizontally at an altitude of 1 mile and a speed of 510 mi/h passes directly over a radar station. Find the rate

sdas [7]

Answer:

442 miles

Step-by-step explanation:

Given

To properly solve this question, I illustrate some given parameters using attached image

From the image, apply Pythagoras theorem

$x^2 + 1^2 = y^2$

Differentiate w.r.t time (t)

$2x\frac{dx}{dt} + 0 = 2y\frac{dy}{dt}$

$2x\frac{dx}{dt} = 2y\frac{dy}{dt}$

Divide both sides by 2

$x\frac{dx}{dt} = y\frac{dy}{dt}$

From the question, we have that the plan travels are 510mi/h.

This implies that:

$\frac{dx}{dt} = 510mi/h$

So, we then calculate the value of x when the distance (y) is 2mi i.e.:

$y = 2mi$

Apply Pythagoras theorem

$x^2 + 1^2 = y^2$

$x^2 + 1^2 = 2^2$

$x^2 + 1 = 4$

$x^2 = 4-1$

$x^2 = 3$

$x = \sqrt 3$

So, the expression becomes:

$x\frac{dx}{dt} = y\frac{dy}{dt}$

$\sqrt 3 * 510 = 2* \frac{dy}{dt}$

$\frac{\sqrt 3 * 510}{2} = \frac{dy}{dt}$

$\sqrt 3 * 255 = \frac{dy}{dt}$

$\frac{dy}{dt} = 255\sqrt 3$

$\frac{dy}{dt} = 255 * 1.7321$

$\frac{dy}{dt} = 441.655$

$\frac{dy}{dt} = 442$

<em>Hence, the distance is 442 miles</em>

7 0

3 years ago