If y=Kxz SQUARED, FIND K IF X=3. Z=2. y=60

A bookseller bought 20 pencils at Rs 4.50 each and sold them at Rs 5.75 each. What i total profit?

WITCHER [35]

<h3>Answer: Rs 25</h3>

Explanation:

Each pencil has a profit of Rs 1.25 since $\text{revenue} - \text{cost} = 5.75 - 4.50 = 1.25$

Multiply that result with 20 to get the final answer shown above in bold.

7 0

1 year ago

Gibbs Baby Food Company wishes to compare the weight gain of infants using its brand versus its competitor’s. A sample of 40 bab

Leviafan [203]

Answer:

$z=\frac{(7.6-8.1)-0}{\sqrt{\frac{2.3^2}{40}+\frac{2.9^2}{55}}}}=-0.936$

The p value can be founded with this formula:

$p_v =P(z$

Since the p value is higher than the significance level provided of 0.05 we have enough evidence to FAIL to reject the null hypothesis and we can't conclude that the true mean for the Gibbs brand is significantly lower than the true mean for the competitor

Step-by-step explanation:

Information given

$\bar X_{1}=7.6$ represent the mean for Gibbs products

$\bar X_{2}=8.1$ represent the mean for the competitor

$\sigma_{1}=2.3$ represent the population standard deviation for Gibbs

$\sigma_{2}=2.9$ represent the sample standard deviation for the competitor

$n_{1}=40$ sample size for the group Gibbs

$n_{2}=55$ sample size for the group competitor

$\alpha=0.05$ Significance level provided

z would represent the statistic

Hypothesis to verify

We want to check if babies using the Gibbs brand gained less weight, the system of hypothesis would be:

Null hypothesis: $\mu_{1}-\mu_{2}=0$

Alternative hypothesis: $\mu_{1} - \mu_{2}< 0$

The statistic would be given by:

$z=\frac{(\bar X_{1}-\bar X_{2})-\Delta}{\sqrt{\frac{\sigma^2_{1}}{n_{1}}+\frac{\sigma^2_{2}}{n_{2}}}}$ (1)

Replacing the info given we got:

$z=\frac{(7.6-8.1)-0}{\sqrt{\frac{2.3^2}{40}+\frac{2.9^2}{55}}}}=-0.936$

The p value can be founded with this formula:

$p_v =P(z$

Since the p value is higher than the significance level provided of 0.05 we have enough evidence to FAIL to reject the null hypothesis and we can't conclude that the true mean for the Gibbs brand is significantly lower than the true mean for the competitor

5 0

3 years ago

Part of the population of 6,750 elk at a wildlife preserve is infected with a parasite. A random sample of 50 elk shows that 3 o

Anastasy [175]

Answer:

405

Step-by-step explanation:

We can use a ratio to solve

3 infected x infected

------------------ = ----------------

50 sampled 6750 population

Using cross products

3*6750 = 50x

Divide each side by 50

3*6750/50 = x

405

7 0

3 years ago

Read 2 more answers

henry has a fair number pyramid with four faces and a spinner with three equal size colored section. the possible outcomes for e

Leya [2.2K]

Assuming the pyramid is numbered 1 to 4 and there are 3 colors on the spinner, the probability of landing on 3 and blue is 1/12.

To find the combined probability, we just multiply the 2 individual probabilities.

P(3) = 1/4
P(blue) = 1/3

1/4 x 1/3 = 1/12

8 0

3 years ago

Click on......................................

SCORPION-xisa [38]

3.5 · 10⁻² · 2.64 · 10²⁰

= 3.5 · 2.64 · 10²⁰⁻²

= 9.24 · 10¹⁸

8 0

4 years ago

If y=Kxz SQUARED, FIND K IF X=3. Z=2. y=60 ​

If y=Kxz SQUARED, FIND K IF X=3. Z=2. y=60