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Iteru [2.4K]
3 years ago
13

PLEASE HELP ME!! ITS RLLY EASY!!

Mathematics
2 answers:
balu736 [363]3 years ago
7 0

Answer:

i think its the last option

Step-by-step explanation:

Arte-miy333 [17]3 years ago
3 0

Answer:

DF,DE,EF

Step-by-step explanation:

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Emma has $89 in her bank account. she uses 30% of her money to pay a bill. How much did she spend?
Alexxandr [17]
The answer is c 10% of 89 is 8.9 so multiply by 3 you get 26.70

7 0
3 years ago
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Could someone tell me the correct answer and how to do this. Plz help meeee I'm crying because I don't know how to do this stuff
WINSTONCH [101]
Hey don't cry . I'm not good at math either but try to take a deep breath.
8 0
3 years ago
Marine scientists categorize signature whistles of bottlenose dolphins by typelong dash—type ​a, type​ b, type​ c, etc. In one s
r-ruslan [8.4K]

Answer:

The 95​% confidence interval for the true proportion of bottlenose dolphin signature whistles that are type a whistles is (0.4687, 0.6123).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

n = 185, \pi = \frac{100}{185} = 0.5405

95% confidence level

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.5405 - 1.96\sqrt{\frac{0.5405*0.4595}{185}} = 0.4687

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.5405 + 1.96\sqrt{\frac{0.5405*0.4595}{185}} = 0.6123

The 95​% confidence interval for the true proportion of bottlenose dolphin signature whistles that are type a whistles is (0.4687, 0.6123).

3 0
3 years ago
Anything helps please help me!
dimaraw [331]
5 1/2 = 11/2
11/2 x 3/4 = 33/8 = 4 1/8
answer is B. 4 1/8
8 0
3 years ago
The drama club needs to sell 50 tickets to the school play. So far, they have sold 9 tickets . What percent of their target have
Aliun [14]

Answer:

18%

Step-by-step explanation:

9 over 50 equals 18 over 100, 18 over a hundred equals 18 percent

8 0
3 years ago
Read 2 more answers
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