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Papessa [141]
3 years ago
5

Thomas walked his dog for 30 minutes today ---- 15 more minutes than yesterday. Express as a percent his walking time today comp

ared to his walking time yesterday. Round to the nearest percent.
150%
175%
200%
125%
Mathematics
2 answers:
kogti [31]3 years ago
8 0
150%
(15 is half of 30)

hope this helps
prisoha [69]3 years ago
7 0

Answer: 150%

Step-by-step explanation:

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A College Alcohol Study has interviewed random samples of students at four-year colleges. In the most recent study, 494 of 1000
Vinil7 [7]

Answer:

The 95% confidence interval for the difference between the proportion of women who drink alcohol and the proportion of men who drink alcohol is (-0.102, -0.014) or (-10.2%, -1.4%).

Step-by-step explanation:

We want to calculate the bounds of a 95% confidence interval of the difference between proportions.

For a 95% CI, the critical value for z is z=1.96.

The sample 1 (women), of size n1=1000 has a proportion of p1=0.494.

p_1=X_1/n_1=494/1000=0.494

The sample 2 (men), of size n2=1000 has a proportion of p2=0.552.

p_2=X_2/n_2=552/1000=0.552

The difference between proportions is (p1-p2)=-0.058.

p_d=p_1-p_2=0.494-0.552=-0.058

The pooled proportion, needed to calculate the standard error, is:

p=\dfrac{X_1+X_2}{n_1+n_2}=\dfrac{494+552}{1000+1000}=\dfrac{1046}{2000}=0.523

The estimated standard error of the difference between means is computed using the formula:

s_{p1-p2}=\sqrt{\dfrac{p(1-p)}{n_1}+\dfrac{p(1-p)}{n_2}}=\sqrt{\dfrac{0.523*0.477}{1000}+\dfrac{0.523*0.477}{1000}}\\\\\\s_{p1-p2}=\sqrt{0.000249+0.000249}=\sqrt{0.000499}=0.022

Then, the margin of error is:

MOE=z \cdot s_{p1-p2}=1.96\cdot 0.022=0.0438

Then, the lower and upper bounds of the confidence interval are:

LL=(p_1-p_2)-z\cdot s_{p1-p2} = -0.058-0.0438=-0.102\\\\UL=(p_1-p_2)+z\cdot s_{p1-p2}= -0.058+0.0438=-0.014

The 95% confidence interval for the difference between proportions is (-0.102, -0.014).

7 0
3 years ago
The opposite of which number is closest to -5?<br> A) -8 <br> B) -7 <br> C) -6 <br> D) 7
Rina8888 [55]

the answer is 7 because all of the other numbers opposites aren't negative

6 0
3 years ago
Read 2 more answers
Jamal wants to my new snow pants that cost $48. If Jamal save six dollars a week for five weeks and five dollars a week for thr
Vinvika [58]

Answer:

No

Step-by-step explanation:

$6 x 5 weeks = $30

$5 x 3 weeks = $15

$30+$15 = $45

He will not have enough for new snow pants. He would need $3 more.

7 0
3 years ago
A flock of cranes migrates from Canada to Texas. The cranes take
zheka24 [161]
\frac{2325}{25}= 93 \\  \\ 288-93=195

They spent 195 hours not flying.
4 0
3 years ago
You are making a snack that includes 5/6 pound of almonds and 7/9 pound of cashews. Which is greater, the weigh of the almonds o
devlian [24]
To compare the answers, you need to have the same denominator. 

We know that, 18 is a common denominator between 6 and 9. 

(5/6)*3/3 => 15/18 (ALMONDS) 
(7/9)*2/2 => 14/18 (CASHEWS) 

As seen, the weight of almonds is 1/18 bigger than the cashews.

Hope I helped :)  
3 0
3 years ago
Read 2 more answers
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