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3 years ago

I NEED HELP!!! PLEASE!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

ale4655 [162]3 years ago

3 0

The awnser to ur question is A because take 2.3 time 3 and get 6.9 and then add the 108 and -3 and get 105

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The difference of 17 and 5 tines a number

emmasim [6.3K]

You can answer this problem in two different ways: the first being (17 - 5) * x, and the second being 12 * x.

6 0

3 years ago

The first house on the street has a lawn that is 200 feet long. The second house has a lawn that is two times the length of the

My name is Ann [436]

Answer:

The length of the second lawn is 400 feet

6 0

1 year ago

Read 2 more answers

I need help will give a lot of credit and brainly if you tell me the right boxes and if it is correct FYI this is zearn

kicyunya [14]

Answer:

Step-by-step explanation:

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2 years ago

A certain type of flashlight requires two type-D batteries, and the flashlight will work only if both its batteries have accepta

VikaD [51]

Answer: Our required probability is 0.167.

Step-by-step explanation:

Since we have given that

n = 15

Probability of success p = 80% = 0.8

Probability of failure q = 20% = 0.2

We need to find the probability that at least fourteen will work.

So, by Binomial distribution, we get that

$P(X\geq 14)=P(X=14)+P(X=15)\\\\P(X\geq 14)=^{15}C_{14}(0.8)^{14}(0.2)+^{15}C_{15}(0.8)^{15}\\\\P(X\geq 14)=0.167$

Hence, our required probability is 0.167.

4 0

3 years ago

A random sample of 20 houses selected from a city showed that the mean size of these houses is 1880 square feet with a standard

azamat

Answer:

Option C

Step-by-step explanation:

Given that for a random sample of 20 houses selected from a city showed that the mean size of these houses is 1880 square feet with a standard deviation of 320 square feet.

X, the sizes of houses is Normal

Hence sample mean will be normal with

Mean = 1880

and std dev = $\frac{320}{\sqrt{20} } \\=71.5542$

For 90% confidence interval critical value for t with degree of freedom 19 is

1.328

Confidence interval upper bound

= mean + margin of error

= $1880+1.328*71.55\\=1975$

Option C is right

3 0

3 years ago