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SVETLANKA909090 [29]
3 years ago
12

Emily ran her first lap in 75 seconds she ran her second lap in 69 seconds using percentages how much better was her second lap

when comapared to her first lap
Mathematics
1 answer:
julsineya [31]3 years ago
7 0

Answer:

Her second lap was <u>8%</u> better when compared to her first lap.

Step-by-step explanation:

Given:

Emily ran her first lap in 75 seconds she ran her second lap in 69 seconds.

Now, to find how much better was her second lap when compared to her first lap.

Emily ran her first lap in 75 seconds.

Emily ran her second lap in 69 seconds.

So, we get the difference in seconds:

75-69=6\ seconds.

<u><em>Thus, in her second lap she was 6 seconds better than first.</em></u>

Now, to get the percentage of her first lap better than second:

\frac{6}{75}\times 100

=0.08\times 100

=8\%.

Therefore, her second lap was 8% better when compared to her first lap.

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The ratio of the length 2.0 meters to the length 1.2 meters is
photoshop1234 [79]

Answer:

The Ration of length 2.0 meters  to the length 1.2 meters = 5 : 3

Step-by-step explanation:

The given two length are 2.0 m  and 1.2 m

Length L1 = 2.0 m     And

Length L2 = 1.2 m

SO, The ratio of L1 : L2 = \frac{2.0}{1.2}

Or, The ratio of L1 : L2 =  \frac{20}{12}

∴    The ratio of L1 : L2 =  \frac{5}{3}

Hence The ratio of L1 : L2 is 5 : 3    Answer

4 0
3 years ago
se tiene que embaldosar el patio interior de un edificio con baldosas cuadradas de 30 cm de lado. El patio es rectangular y sus
shepuryov [24]

Answer:

40,000 baldosas

Step-by-step explanation:

Lo primero que debemos hacer aquí es calcular el área del patio rectangular.

El mejor enfoque para esto es convertir primero sus medidas a centímetros

Matemáticamente, 100 cm = 1 m, entonces 10 m se convierten en 1000 cm y 12 m se convierten en 1200 m.

El área de un rectángulo es L * B y, por lo tanto, tenemos 1200 * 1000 = 1,200,000 cm ^ 2

Ahora, para saber la cantidad de azulejos que tendrá el patio, necesitaremos dividir el área del patio por el área de los azulejos

Matemáticamente, eso sería 1,200,000 / 30 = 40,000 fichas

6 0
3 years ago
Jack is a farmer and he wants to know the average weight of all the potatoes in a sack. He randomly selects 10 potatoes and weig
Maurinko [17]
Jack should remove the maximum and minimum weight potatoes from the average weight of the potatoes to compensate for the extremes. Therefore, we are left with a data set of:
8, 9, 11, 7, 7, 8, 9, 7; so n = 8
The sum of these is 66
The average weight of each potato is:
66/8
= 8 ounces
7 0
3 years ago
How do you check -6=b/18 when b is -108?
Tresset [83]

Answer: Substitute -108 into the place of b

Step-by-step explanation:

-6=b/18

-6=-108/18

-6=-6

You get the same answer, which makes it correct.

3 0
3 years ago
I only need help with justifying the step in solving the problem. Please help!
ale4655 [162]

Well, for method one the first step we have is distribution, then combining like terms, then property of subtraction, then division.  For method two, I'm not entirely sure what they did there.  I've never done math like that.  Sorry I can't help you out all the way.

-TTL

3 0
3 years ago
Read 2 more answers
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