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PSYCHO15rus [73]
3 years ago
13

Coleen is making 30 necklaces out of leather stings.Each necklace requires 30cm of sting.

Mathematics
2 answers:
dalvyx [7]3 years ago
5 0

Answer:

How many centimeters of string does she need?

30 * 30 cm = 900 cm

If the total cost of the string was $4.41, how much did she spend per meter?

4.41 / 9 = $0.49 per meter

gogolik [260]3 years ago
5 0

So 30 necklaces with 30cm of string each, and the total cost was $4.41, but we have to find out how much each meter cost. Wow this problem is a little confusing.


To find the total centimeters of string she needs, we do 30 x 30, which is 900. So she needs 900cm of string.


Now, we have to find how much string is per meter. 1 meter is 100cm, and we know that she needs 900cm, so she needs 9 meters of string. Now, we divide 4.41 by 9, giving us 0.49.


So she needs 900cm of string, and it costs $0.49 per meter.

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A car's velocity changes at a rate of 36 miles per hour in 0.5 hour.
kotegsom [21]

Answer:

72

Step-by-step explanation:

In order to find the acceleration we need first to defined it, so:

acceleration=((final velocity)-(initial velocity))/time interval

a=(vf-vi)/dt

But (vf-vi) actually represents the velocity change, so (vf-vi)/dt represents the velocity change rate. This means that in our case:

a=(36miles/hour)/(0.5hours)

a=72miles/hour^2

In conclusion the acceleration is a=72miles/hour^2, without units just 72.

7 0
4 years ago
4. Andrés desea embaldosar el piso de su casa que tiene 375 cm de ancho y 435 cm de largo. Calcula la longitud del lado que tend
svetlana [45]

Answer:

Sabemos que el piso es un rectángulo de 435 cm de largo y 375 cm de ancho.

Recordar que para un rectángulo de largo L, y ancho W, el área es:

A = L*W

Entonces el área del piso, será:

A = 435cm*375cm = 163,125 cm^2

Primero, sabemos que se utilizaran baldosas (las cuales son cuadradas) y queremos saber la longitud de lado que tendrían las baldosas.

No tenemos ningún criterio para encontrar este lado, solo que (si queremos usar un número entero de baldosas) el largo L del lado de la baldosa deberá ser un divisor de tanto el ancho como el largo del suelo.

Dicho de otra forma

el largo, 435cm, tiene que ser múltiplo de L

el ancho, 375cm, tiene que ser múltiplo de L.

Por ejemplo, ambos números son múltiplos de 5, entonces podríamos tomar L = 5cm

En este caso, el área de cada baldosa es:

a = L^2 = 5cm*5cm = 25cm^2

Y el número total de baldosas que necesitaría usar esta dado por el cociente entre el área del suelo y el area de cada baldosa.

N = ( 163,125 cm^2)/(25cm^2) = 6,525 baldosas.

También sabemos que ambos números (435cm y 375cm) son múltiplos de 15cm

Entonces las baldosas podrían tener 15cm de lado.

En este caso, el área de cada baldosa es:

A = (15cm)^2 = 225cm

En este caso el número total de baldosas necesarias será:

N =  ( 163,125 cm^2)/(225cm^2) = 725 baldosas.

5 0
3 years ago
What type of triangle has exactly two acute triangles ​
Sveta_85 [38]

Answer: A right triangle.

Step-by-step explanation:

This is because an acute triangle would have all of its three sides acute while an obtuse one would have two acute angles as well, but also an obtuse one. If the question is specifically asking for a triangle with exactly two acute angles, a right triangle would be the answer.

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tresset_1 [31]

Answer:

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Step-by-step explanation:

6 0
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photoshop1234 [79]
One side of the square is 15 cause 15 times 15=225
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3 years ago
Read 2 more answers
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