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aliya0001 [1]
3 years ago
14

what does the s mean in this elasped time expression:30 min equals ______ s and please answer this question:)

Mathematics
2 answers:
r-ruslan [8.4K]3 years ago
7 0
I believe it stands for seconds
Valentin [98]3 years ago
5 0
It should be for seconds...

30min(60sec/min)=1800s
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xz_007 [3.2K]

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2 years ago
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(1 pt) In a study of red/green color blindness, 950 men and 2050 women are randomly selected and tested. Among the men, 89 have
Ivahew [28]

Answer: (0.066,0.116)

Step-by-step explanation:

The confidence interval for proportion is given by :-

p_1-p_2\pm z_{\alpha/2}\sqrt{\dfrac{p_1(1-p_1)}{n_1}+\dfrac{p_2(1-p_2)}{n_2}}

Given : The proportion of men have red/green color blindness = p_1=\dfrac{89}{950}\approx0.094

The proportion of women have red/green color blindness = p_2=\dfrac{6}{2050}\approx0.003

Significance level : \alpha=1-0.99=0.01

Critical value : z_{\alpha/2}=z_{0.005}=\pm2.576

Now, the 99% confidence interval for the difference between the color blindness rates of men and women will be:-

(0.094-0.003)\pm (2.576)\sqrt{\dfrac{0.094(1-0.094)}{950}+\dfrac{0.003(1-0.003)}{2050}}\approx0.091\pm 0.025\\\\=(0.09-0.025,0.09+0.025)=(0.066,\ 0.116)

Hence, the 99% confidence interval for the difference between the color blindness rates of men and women= (0.066,0.116)

4 0
3 years ago
Frank buys p pounds of oranges for $2.29 per pound and the same number of pound ls of apples for $1.69 per pound. What does the
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It represents the amount you'll spend all together on one pound of oranges and one pound of apples.

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3 years ago
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natita [175]

Answer:

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2x-80=18, add 80 to each side

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x=49

3)

Since the triangles are similar we can say that

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25(x+5)=10(4x-1)

25x+125=40x-10, subtract 40x from each side

-15x+125=-10, subtract 125 from each side

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d1i1m1o1n [39]
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