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4 years ago

3

Mathematics

1 answer:

ASHA 777 [7]4 years ago

8 0

Answer:

A and B

Step-by-step explanation:

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Daniela needs to cut a rectangular hole in a wall where a new window will be installed. The window will be 4 feet high and 3 fee

BlackZzzverrR [31]

Answer:

Measure the diagonals, they should be 5 feet (3,4,5 triangle).

Step-by-step explanation:

As a more general answer, the diagonal measurements of ANY rectangle will be equal. You can calculate the correct measurement using A^2 + B^2 = C^2. A and B are the lengths of the sides and C is the length of the diagonals.

8 0

4 years ago

Find the width of a rectangle 25 feet and the perimeter is 80

lukranit [14]

$\huge\underline{\red{A}\blue{n}\pink{s}\purple{w}\orange{e}\green{r} -}$

Given - a rectangle with length 25 feet and perimeter 80 feet

To calculate - width of the rectangle

We know that ,

$\bold{Perimeter \: of \: rectangle = 2(l + b)} \\$

where b = width / breadth of rectangle

‎ ‎ ‎

substituting the values in the formula stated above ,

$\bold{80 = 2(25 + b)} \\ \\\bold{ \implies \: 25 + b = \cancel \frac{80}{2} } \\ \\ \bold{\implies \: 25 + b = 40 }\\ \\ \bold{\implies \: b = 40 - 25 }\\ \\\bold{ \implies \: b = 15 \: feet}$

hope helpful ~

3 0

2 years ago

Read 2 more answers

Given the speeds of each runner below determine who runs the fastest

Liula [17]

Answer:

Stephanie ran the fastest at 15 feet per second

Step-by-step explanation:

Frank ran the second fastest at 13.2 feet per second because it took him 60 seconds to run 792 feet, and 792/60 = 13.2

Debbie ran the third fastest at 12.08 feet per second because it took her 23 seconds to run 278 feet, and 278/23=12.086

Noah gets last place because it took him 551 seconds to run a mile, or 5280 feet, and 5280/551=9.58 feet per second

4 0

3 years ago

what is the surface are of a colonial grain storage tank that has a height of 54 meters and a diameter of 18 meters? 1802m^2, 17

vodomira [7]

The tank has the shape of a cone
So, the area of the cone = π r²+ π r s

where r is the radius
          s is the slant height = √(r²+h²)
          h is the height
given the diameter = 18 m and the height = 54 m
∴ r = 9 m , h = 54 m
∴ s = √(r²+h²) = √(9² + 54²) = 54.745 m
∴ Area = π r²+ π r s
             = π * 9² + π * 9 * 54.745 ≈ 1802.3 m²

The correct answer is the first option 1802 m²

6 0

3 years ago

Jenna read 25 pages of a book in 30 minutes at the same rate how many pages can she read in 3 hours

frozen [14]

• Convert 3 hours into minutes: 3 x 60(minutes in an hour) = 180 minutes
• Divide to see how many times 30 minutes goes into 180: 180 ÷ 30 = 6
• Multiply: 25 x 6 = 150

So, Jenna can read 150 pages of a book in 3 hours. Hope this helps! :D

~PutarPotato

8 0

3 years ago