The following histogram presents the amounts of silver (in parts per million) found in a sample of rocks. One rectangle from the

Answer:

together they rake leaves in one minute.

Step-by-step explanation:

If Maya takes x minutes to rake, then in one minute, she rakes leaves.

For Carla, if her raking takes y minutes, in one minute she rakes leaves.

Thus, to find the amount they work together in one minute, we add both of their contributions for that minute, resulting in:

Finally, simplifying this expression gives:

As a result, they collectively rake leaves in a minute.

Answer:

When x = 72, the z score is:

The average is 58

This z-score indicates that x= 72 is 1.273 standard deviations above the mean.

Step-by-step explanation:

Let’s consider the following details for this question: John's typing speed on a test is assumed to follow a normal distribution. Let X denote the number of words he can type in a minute. Hence, X ~ N(58, 11). It’s important to round the result to three decimal points if needed.

Provide your response below for words per minute on a typing test conducted on Sunday. The z score when x = 72 is

In this scenario, we acknowledge that the variable under consideration is represented by a normal distribution:

The formula for the z score is as follows:

By substituting values, we derive:

The mean is 58

This z-score indicates that x= 72 is 1.273 standard deviations higher than the mean.