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Nostrana [21]
3 years ago
13

In preparation for a 3-day charity walk, Courtney is taking daily walks. To get an idea of how long the charity walk will take,

she records the time and distance of her walks. Yesterday, she walked 2.4 miles in 45 minutes. Today, she walked 2.8 miles in 52.5 minutes.
Assuming she walks at a constant rate, which of the following statements applies?

A.

An additional 3.2 hours of walking is associated with an additional mile walked.

B.

An additional hour of walking is associated with an additional 0.7 mile walked.

C.

An additional hour of walking is associated with an additional 3.2 miles walked.

D.

An additional 0.7 hour of walking is associated with an additional mile walked.
Mathematics
1 answer:
Vinvika [58]3 years ago
7 0

Answer: the answer is C

Step-by-step explanation:

took the test

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The formula for distance traveled d is d=rt, where r is the average speed of the object and t is time traveled. If an object tra
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Answer:

22.5

Step-by-step explanation:

d= 75(.30)

5 0
3 years ago
Cual es la expasion decimal de 13/7
OverLord2011 [107]

Answer:

1.8571428571428571428571428571429‬

Step-by-step explanation:

Just divided it. The answer will be given exactly. :)

8 0
3 years ago
1 Point
I am Lyosha [343]

Option C

The ratio for the volumes of two similar cylinders is 8 : 27

<h3><u>Solution:</u></h3>

Let there are two cylinder of heights "h" and "H"

Also radius to be "r" and "R"

\text { Volume of a cylinder }=\pi r^{2} h

Where π = 3.14 , r is the radius and h is the height

Now the ratio of their heights and radii is 2:3 .i.e  

\frac{\mathrm{r}}{R}=\frac{\mathrm{h}}{H}=\frac{2}{3}

<em><u>Ratio for the volumes of two cylinders</u></em>

\frac{\text {Volume of cylinder } 1}{\text {Volume of cylinder } 2}=\frac{\pi r^{2} h}{\pi R^{2} H}

Cancelling the common terms, we get

\frac{\text {Volume of cylinder } 1}{\text {Volume of cylinder } 2}=\left(\frac{\mathrm{r}}{R}\right)^{2} \times\left(\frac{\mathrm{h}}{\mathrm{H}}\right)

Substituting we get,

\frac{\text {Volume of cylinder } 1}{\text {Volume of cylinder } 2}=\left(\frac{2}{3}\right)^{2} \times\left(\frac{2}{3}\right)

\frac{\text {Volume of cylinder } 1}{\text {Volume of cylinder } 2}=\frac{2 \times 2 \times 2}{3 \times 3 \times 3}

\frac{\text {Volume of cylinder } 1}{\text {Volume of cylinder } 2}=\frac{8}{27}

Hence, the ratio of volume of two cylinders is 8 : 27

7 0
3 years ago
Fufydydyfufufugigjgig
ludmilkaskok [199]

Answer: ok boomer :3

Step-by-step explanation:

7 0
3 years ago
A triangular pyramid has a base shaped like an equilateral triangle. The legs of the equilateral triangle are all 20 inches long
Pie

Answer:

Surface area of pyramid with base equilateral triangle is 390+100\sqrt{3} square inches

Step-by-step explanation:

Recall the following result:

The total surface area(S) of a regular pyramid is given by,

S = \frac{1}{2}pl+B                                       ...... (1)

Here, p represents the perimeter of the base , l the slant height and B the base area of the pyramid.

From the given information:

Side of equilateral triangle = 20 inches

Slant height of the pyramid(l) = 13 inches.

First find the perimeter and Area of the base pyramid.

Perimeter of equilateral triangle(p) = 3 \times (side)

                                                          = 3 \times 20 = 60 inches

Area of equilateral triangle(B) = \frac{\sqrt{3} }{4} \times (side)^{2}

                                                 =\frac{\sqrt{3} }{4} \times (20)^2 = 100\sqrt{3}  square inches.

Substitute the above values in equation (1) as shown below:

S=\frac{1}{2} \times 60 \times 13+100\sqrt{3}

S= 390+100\sqrt{3} square inches

Hence, the surface area of pyramid with base equilateral triangle is 390+100\sqrt{3} square inches.

6 0
3 years ago
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