All categories

3 years ago

An element with mass 310 grams decays by 5.7% per minute. How much of the

Mathematics

2 answers:

Vilka [71]3 years ago

4 0

Answer:tree

Step-by-step explanation:saw

ASHA 777 [7]3 years ago

4 0

Answer:

100

Step-by-step explanation:

You might be interested in

USE AN AREA MODEL TO EXPLAIN THE PRODUCT OF 4.6 and 3

makvit [3.9K]

The answer is 13.8 and to explain the area model is 8 boxes with 13 mini boxes does that help or should i explain it again

4 0

3 years ago

What is 41/4 as a mixed number

lord [1]

41/4 is 10 $\frac{1}{4}$

6 0

3 years ago

Find the sum. (7x® + 2x5 – 3x² + 9x) + (5x + 8x? – 6x² + 2x – 5) =

kompoz [17]

Answer:

I love Math anyways

the ans is in the picture with the steps

(hope it helps can i plz have brainlist :D hehe)

Step-by-step explanation:

7 0

3 years ago

Is 2 yards greater than 5 feet explain

kicyunya [14]

Answer:

Yes, 2 yards is greater than 5 feet. 1 yard is equal to 3 feet, so 2 yards is equal to 6 feet. 6 feet is more than 5 feet.

3 0

4 years ago

A manufacturer of electronic kits has found that the mean time required for novices to assemble its new circuit tester is 3 hour

vitfil [10]

Testing the hypothesis using the z-distribution, it is found that since the p-value of the test is of 0.0262 < 0.05, it can be concluded that the new booklet is effective.

At the null hypothesis, we test if there has been no improvement, that is, the time is still of 3 hours. Hence:

$H_0: \mu = 3$

At the alternative hypothesis, we test if there has been improvement, that is, the time is of less than 3 hours. Thus:

$H_1: \mu < 3$

We have the standard deviation for the population, thus, the z-distribution is used. The test statistic is given by:

$z = \frac{\overline{x} - \mu}{\frac{\sigma}{\sqrt{n}}}$

The parameters are:

$\overline{x}$ is the sample mean.
$\mu$ is the value tested at the null hypothesis.
$\sigma$ is the standard deviation of the population.
n is the sample size.

In this problem, the values of the parameters are: $\mu = 3, \sigma = 0.2, \overline{x} = 2.9, n = 15$ .

Then, the value of the test statistic is:

$z = \frac{2.9 - 3}{\frac{0.2}{\sqrt{15}}}$

$z = -1.94$

The p-value of the test is the probability of finding a sample mean of 2.9 hours or less, which is the p-value of z = -1.94.

Looking at the z-table, z = -1.94 has a p-value of 0.0262.

Since the p-value of the test is of 0.0262 < 0.05, it can be concluded that the new booklet is effective.

A similar problem is given at brainly.com/question/25413422

8 0

3 years ago