3 years ago

What will the length and width be for a perimeter of 15

Mathematics

2 answers:

Sergeu [11.5K]3 years ago

3 0

3 and 5 because 3 times 5 is 15

Natali [406]3 years ago

3 0

There are multiple possible answers for this. To determine one of the possible answers you would use the formula P = 2l + 2w, where l stands for the length and w stands for the width. I would choose a number for the length, such as a 4 and substitute it in the formula. This would make it 15 = 8 + 2w. Solve the equation by subtracting 8 from both sides and then dividing both sides by 2. This would give you a width of 3.5 units.

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Karen claps her hand and hears the echo from a distant wall 0.113 s later. How far away is the wall? The speed of sound in air i

insens350 [35]

Answer:

19.3795 m

Step-by-step explanation:

If sound travels at 343 m/s and it took Karen 0.113 s to hear the echo from the wall, the distance travelled by the sound is:

$D=343\frac{m}{s} *0.113\ s\\D= 38.759\ m$

Note that the distance calculated above is the distance travelled from Karen to the wall and then back from the wall to Karen. Therefore, the distance between Karen and the wall is:

$d=\frac{38.759}{2}\\d=19.3795\ m$