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3 years ago

What is 78% of 30? help plss

Mathematics

1 answer:

riadik2000 [5.3K]3 years ago

7 0

Answer:

0.78 x 30 = 23.4. I think 23.4 is 78 % of 30.

Step-by-step explanation:

You might be interested in

The sales of a grocery store had an average of $7,000 per day. The store introduced several advertising campaigns in order to in

Sati [7]

Answer:

a.The advertising campaigns increased the average daily sales.

Step-by-step explanation:

This is a hypothesis test for the population mean.

The claim is that the advertising campaigns increased the average daily sales.

Then, the null and alternative hypothesis are:

$H_0: \mu=7000\\\\H_a:\mu> 7000$

The significance level is 0.05.

The sample has a size n=100.

The sample mean is M=7280.

The standard deviation of the population is known and has a value of σ=1000.

We can calculate the standard error as:

$\sigma_M=\dfrac{\sigma}{\sqrt{n}}=\dfrac{1000}{\sqrt{100}}=100$

Then, we can calculate the z-statistic as:

$z=\dfrac{M-\mu}{\sigma_M}=\dfrac{7280-7000}{100}=\dfrac{280}{100}=2.8$

This test is a right-tailed test, so the P-value for this test is calculated as:

$\text{P-value}=P(z>2.8)=0.0026$

As the P-value (0.0026) is smaller than the significance level (0.05), the effect is significant.

The null hypothesis is rejected.

There is enough evidence to support the claim that the advertising campaigns increased the average daily sales.

7 0

3 years ago

which number correctly completes this equation 3/4%x75= A. 0.255 B. 0.5625 C. 2.55. D. 5.626

timofeeve [1]

3/4% × 75

3/4 of a percent is .0075.

0.0075 times 75 = 0.5625

The answer is B) 0.5625.

5 0

3 years ago

Solve this equation:-36q = 18

zimovet [89]

Given:

$36q=18$

Required:

To solve the given equation.

Explanation:

Consider

$36q=18$

Divide 36 on both side, we get

$\begin{gathered} \frac{36q}{36}=\frac{18}{36} \\ \\ q=\frac{18}{36} \\ \\ q=\frac{1}{2} \end{gathered}$

Final Answer:

$q=\frac{1}{2}$

3 0

1 year ago

Pls hellllppp ill mark as brainlist

MrRissso [65]

Answer:

the surface area is not equal to 296 sq ft.

Step-by-step explanation:

There are total six faces of the given rectangular prism

Area of the top and bottom face is equal to 288 Sq ft

Area front face and the face at the back = 2 * 2 * 144 = 576 Sq. ft.

Area of the other two sides is = 2 * 2 * 144 = 576 Sq. ft.

The total surface area of the prism is 576 +576 + 288 = 1440 Sqft

No, the surface area is not equal to 296 sq ft.

4 0

4 years ago

a telephone pole casts a shadow that is 29 m long. find the height of the telephone pole if a statue that is 38cm tall casts a s

mafiozo [28]

You do cross multiplication so multiply 29 by 38 and then divide it by 78 which gives you answer of 14.128 cm

6 0

3 years ago