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Andreyy89
3 years ago
12

PLEASE HELP I NEEED HELP ASAP

Mathematics
1 answer:
dolphi86 [110]3 years ago
6 0

Answer:

B

Step-by-step explanation:

Using the rule of radicals

\sqrt{a} × \sqrt{b} ⇔ \sqrt{ab} and

\sqrt{-1} = i

Given

\sqrt{-80}

= \sqrt{16(5)(-1)}

= \sqrt{16} × \sqrt{5} × \sqrt{-1}

= 4 × \sqrt{5} × i

= 4i\sqrt{5} → B

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The length of the rectangle is 20 inches, and the width of the rectangle is 4 inches if the table runner has an area of 80 square inches. The length and width of the table runner are whole numbers. The length is 5 times greater than the width.

<h3>What is the area of the rectangle?</h3>

It is defined as the space occupied by the rectangle which is planner 2-dimensional geometry.

The formula for finding the area of a rectangle is given by:

Area of rectangle = length × width

The area of the table runner = 80 square inches

Let's assume the length of the rectangle is L and the width is W

Then L = 5×W ...(1)

L×W = 80 ...(2)

Put the value of L in the equation (2)

5W(W) = 80

5W² = 80

W² = 16

W = ±4

Width cannot be negative.

W = 4 inches putting this value in the equation (1)

L = 5(4) = 20 inches

Thus, the length of the rectangle is 20 inches, and the width of the rectangle is 4 inches if the table runner has an area of 80 square inches. The length and width of the table runner are whole numbers. The length is 5 times greater than the width.

Learn more about the area here:

brainly.com/question/14383947

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8 0
2 years ago
Someone answer this please
lions [1.4K]

Answer:

1,334.5 \:  {cm}^{3}

Step-by-step explanation:

Height of the cylinder h = 17 cm

Radius of the cylinder r = 5 cm

V_{cylinder}  = \pi {r}^{2} h \\  \\  = 3.14 \times  {(5)}^{2}  \times 17 \\  \\  = 3.14 \times 25 \times 17 \\  \\V_{cylinder}  = 1,334.5 \:  {cm}^{3}

7 0
3 years ago
Mary rounds these numbers to the nearest hundred. Which number does she round to 400? Choose all that apply. A) 351. B) 369 C).
natulia [17]

Answer:

401

Step-by-step explanation:

7 0
2 years ago
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