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3 years ago

Choose the appropriate unit. The boy is 1.5 tall

Mathematics

2 answers:

Ierofanga [76]3 years ago

7 0

The answer should be 1.5 feet tall but if you are talking about metric units then yards tall i believe.

Firdavs [7]3 years ago

3 0

The until would be ft

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24% of U.S. adults say they are more likely to make purchases during a sales tax holiday. you randomly select 10 adults. find th

neonofarm [45]

Answer:

a) $p(X= 2) = 0.261$

b) P(x>2) = 0.566

c) P(2<x<5) = 0.334

Step-by-step explanation:

Given 24% of U.S. adults say they are more likely to make purchases during a sales tax holiday

Probability 0f U.S. adults say they are more likely to make purchases during a sales tax holiday (p) = 0.24

n = 10

By using Poisson distribution

mean number of make purchases during a sales tax holiday

λ = np = 10 X 0.24 = 2.4

The probability of getting exactly '2'

The probability $p(X= 2) = e^{-\alpha } \frac{\alpha^r }{r! }$

$p(X= 2) = e^{2.4 } \frac{\(2.4)^2 }{2! }$

$p(X= 2) = e^{2.4 } \frac{\(2.4)^2 }{2! }= 0.261$

b) The probability of getting more than '2'

$P(X>2) = 1- {p(x=0)+p(x=1)+p(x=2)}$

$= e^{-2.4 } \frac{(2.4)\^0 }{0! }+ e^{-2.4 } \frac{(2.4)\^1 }{1!}+e^{-2.4 } \frac{(2.4)\^2 }{2!}$

= 0.090 + 0.2177+0.261 = 0.566

P(x>2) = 0.566

c) The probability of getting between two and five

P( 2<x<5) = P(x=3)+p(x=4) = $= e^{-2.4 } \frac{(2.4)\^3 }{3! }+ e^{-2.4 } \frac{(2.4)\^4 }{4!}+$

P(2<x<5) = 0.2090 + 0.125 = 0.334

4 0

3 years ago

M=3rt squared -2rv solve for v.

insens350 [35]

M = 3rt^2 - 2rv
2rv = 3rt^2 - M
v = (3rt^2 - M)/2r

7 0

3 years ago

I WILL GIVE BRAINLIEST TO FIRST RIGHT ANSWER

nikitadnepr [17]

Answer:

5.7 m/s

Step-by-step explanation:

<u>Approximate rate of change:</u>

(25.1 - 2.3)/(4 - 0) =
22.8/4 =
5.7 m/s

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2 years ago

Hayden wanted to investigate whether there was a difference in the time spent in the checkout line between two grocery stores. S

Ber [7]

Answer:

No. The data in this study were not based on a random method. This is a key requirement for an inference to be made from the two-sample t-test.

Step-by-step explanation:

1. Hayden can use the two-sample t-test (also known as the independent samples t-test)to find out if there was a difference in the time spent in the checkout time between two grocery stores and to conclude whether the difference in the average checkout time between the two stores is really significant or if the difference is due to a random chance. There are three conditions to be met when using the two-sample t-test.

2. The first condition is that the sampling method must be random. This requirement was not met in this study. Each customer from each store should have an equal chance of being selected for the study. This was not achieved.

3. The distributions of the sample data are approximately normal. This is achieved with a large sample size of 30 customers selected for each study.

4. The last but not the least condition is the independence of the sample data. Sample data here is independent for both samples.

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3 years ago

Can someone please help me???

olganol [36]

Answer:

1. 60000.12

2. 54000.15

3. 9600.48

4. 3840.48

Step-by-step explanation:

I really hope this helps and may I receive brainliest please

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3 years ago