Can someone pls help me with this problem

Mathematics

2 answers:

VLD [36.1K]3 years ago

7 0

Answer:

Rule= Y × 10

X ÷ 10

Step-by-step explanation:

NNADVOKAT [17]3 years ago

7 0

Answer: y * 10 = x

x / 10=y

Step-by-step explanation:

the rule is 10 so you either divide X by 10 or multiply Y by 10.

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Using the numbers 2,5,8, and 9 create a equation that equals 4

lbvjy [14]

9-8=1+5=6-2=4

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4 0

3 years ago

Suppose that a wall is constructed from concrete blocks where a block is a normal random variable with mean 11 kg and standard d

Artemon [7]

Answer:

The value for k is about k = 11.093kg.

Step-by-step explanation:

To answer this question, that is, P(x<k) = 0.85, we can use the standardized value for a raw score, or the formula for obtaining z-scores:

$\\ z = \frac{x - \mu}{\sigma}$ [1]

Where

$\\ x$ is the raw score.

$\\ \mu$ is the population mean.

$\\ \sigma$ is the population standard deviation.

In this case, we are asking to find a value x = k, so that 85% of the blocks have weights less than k (kg).

We have also to use the values for the cumulative standard normal distribution with $\\ \mu = 0$ and $\\ \sigma = 1$ to find the value of z that corresponds to a probability of 0.85.

First step: find the z that corresponds to the probability of 0.85.

To use the formula [1], as we previously mentioned, we first need to find the value of z that corresponds to a probability of 0.85 using the cumulative standard normal distribution table (available in any Statistics books or on the Internet). Then, for a cumulative probability of 0.85, the corresponding value for z = 1.03 (approximately).

Second step: solve the formula [1] for x.

Solving this formula for x, we have:

$\\ z = 1.03$