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Fittoniya [83]
3 years ago
5

After several softball games Jenni has 12 hits and five walks what is the ratio of hits and walks select

Mathematics
2 answers:
vesna_86 [32]3 years ago
6 0
12:5 I think is correct .
hjlf3 years ago
5 0

Answer:

12:5

Step-by-step explanation:

Here's why simple place the ration in between so we divide 12 to 5. Which also is equivalent to 12/5.

All correct ratios maybe 24:10, 48:20, and more!

If this helps hit Thank button!


If you need more help feel free to post a comment.

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Write an expression that is equivalent to 2/3 (4x + 9)
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Answer:

8x/3 + 6

Step-by-step explanation:

3 0
3 years ago
Express 510 & 3/10 % as a decimal fraction.
Naddika [18.5K]

Answer:

5.10 and 0.3

Step-by-step explanation:

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hope this helps

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3 years ago
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3 0
3 years ago
In quadratic drag problem, the deceleration is proportional to the square of velocity
Mars2501 [29]
Part A

Given that a= \frac{dv}{dt} =-kv^2

Then, 

\int dv= -kv^2\int dt \\  \\ \Rightarrow v(t)=-kv^2t+c

For v(0)=v_0, then

v(0)=-kv^2(0)+c=v_0 \\  \\ \Rightarrow c=v_0

Thus, v(t)=-kv(t)^2t+v_0

For v(t)= \frac{1}{2} v_0, we have

\frac{1}{2} v_0=-k\left( \frac{1}{2} v_0\right)^2t+v_0 \\  \\ \Rightarrow \frac{1}{4} kv_0^2t=v_0- \frac{1}{2} v_0= \frac{1}{2} v_0 \\  \\ \Rightarrow kv_0t=2 \\  \\ \Rightarrow t= \frac{2}{kv_0}


Part B

Recall that from part A, 

v(t)= \frac{dx}{dt} =-kv^2t+v_0 \\  \\ \Rightarrow dx=-kv^2tdt+v_0dt \\  \\ \Rightarrow\int dx=-kv^2\int tdt+v_0\int dt+a \\  \\ \Rightarrow x=- \frac{1}{2} kv^2t^2+v_0t+a

Now, at initial position, t = 0 and v=v_0, thus we have

x=a

and when the velocity drops to half its value, v= \frac{1}{2} v_0 and t= \frac{2}{kv_0}

Thus,

x=- \frac{1}{2} k\left( \frac{1}{2} v_0\right)^2\left( \frac{2}{kv_0} \right)^2+v_0\left( \frac{2}{kv_0} \right)+a \\  \\ =- \frac{1}{2k} + \frac{2}{k} +a

Thus, the distance the particle moved from its initial position to when its velocity drops to half its initial value is given by

- \frac{1}{2k} + \frac{2}{k} +a-a \\  \\ = \frac{2}{k} - \frac{1}{2k} = \frac{3}{2k}
7 0
3 years ago
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