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2 years ago

7th grade MATH.... PLEASE HELP ASAP!!!!

Mathematics

1 answer:

JulsSmile [24]2 years ago

3 0

Answer:

7 times 1/5

Step-by-step explanation:

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2 years ago

Read 2 more answers

DUE IN 2 MINTUES PLZZ HELP

dusya [7]

Answer:

320

Step-by-step explanation:

6400 x minute = 6400/60 = 106.66666666666666666666666666667 ft/h

*3=320ft

320ft to miles = 0.0606061

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3 years ago

Suppose that 75% of all trucks undergoing a brake inspection at a certain inspection facility pass the inspection. Consider grou

RSB [31]

Answer:

b) 0.2961

c) 0.2251

d) Mean = 11.25, Standard deviation = 1.667

Step-by-step explanation:

We are given the following information:

We treat trucks undergoing a brake inspection passin as a success.

P( trucks undergoing a brake inspection passes the test) = 75% = 0.75

a) Conditions for binomial probability distribution

There are n independent trial.
Each trial have a success probability p
The probability of success is same for all trials.

Then the number of trucks undergoing a brake inspection follows a binomial distribution, where

$P(X=x) = \binom{n}{x}.p^x.(1-p)^{n-x}$

where n is the total number of observations, x is the number of success, p is the probability of success.

Now, we are given n = 15

b) P(proportion of groups will between 8 and 10 trucks pass the inspection)

We have to evaluate:

$P(8\leq x \leq 10) = P(x = 8) + P(x = 9) + P(x = 10)\\= \binom{15}{8}(0.75)^8(1-0.75)^7 + \binom{15}{9}(0.75)^9(1-0.75)^6 + \binom{15}{10}(0.75)^{10}(1-0.75)^5\\= 0.0393 + 0.0917 + 0.1651\\= 0.2961$

c) P( exactly 3 trucks fail the inspection)

p = 0.25

$P(x = 3)\\= \binom{15}{3}(0.25)^3(1-0.25)^{12}\\=0.2251$

d) Mean and standard deviation

$\mu = np = 15(0.75) = 11.25\\\sigma = \sqrt{np(1-p)} = \sqrt{15(0.75)(1-0.75)} = 1.667$

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3 years ago

A shadow 60 meters long is cast by a stone tower that is 32 meters tall. If a cedar tree close

hjlf

Answer:

107

Step-by-step explanation:

you will add 60 + 32 +15 = 107 that is how i got the answer

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2 years ago

Kim purchased a desktop computer at Best Buy for 20% off the original price. If the original price of the desktop is $1500, how

Arturiano [62]

Answer:

So for this sale, you'll save $300.00 on this item.

This means, the cost of the item to you is

$1500 - $300.00 = $1200.00.

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3 years ago