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3 years ago

Describe the number 78 in 2 different ways

Mathematics

2 answers:

Vladimir [108]3 years ago

6 0

Find each percent to the nearest percent. State if it is an icrease or a decrease. From 45 ft to 92 ft

Art [367]3 years ago

5 0

60+18 50+28 its ok?????

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bryson is laying down sod in his yard to grow a new lawn each piece of sod is by 1 foot by 1 foot square how many pieces of sod

saw5 [17]

This is pretty easy and its not 3rd grade hw but whatever

First u do: 30 × 14 which = to 420

EXPLANATION:

If Sod covers 1-foot by 1-foot square then the amount needed will be need to be multiplied by the area of the yard and also 1

Answer: 420 peices

Hope this helped (If so please give brainliest, would really appreciate it)

8 0

3 years ago

Express 28^1/2 in simplest radical form.

Reptile [31]

Answer:

Step-by-step explanation:

28^1/2=√(28)=√(4×7)=2√7

3 0

3 years ago

According to a recent study of 7335 young people in the US, 30% had been arrested for a crime other than a traffic violation by

victus00 [196]

Answer:

a) Statistic.

b) The population proportion is expected to be between 0.29 and 0.31 with a 94% degree of confidence.

Step-by-step explanation:

a) The proportion of 30% is a statistic, as it is a value that summarizes data only from the sample taken in the study from USA Today. Other samples may yield different proportions.

b) We can use the statistic to estimate a confidence interval for the parameter of the population.

The standard error for the proportion is calculated as:

$\sigma_p=\sqrt{\dfrac{p(1-p)}{N}}=\sqrt{\dfrac{0.3\cdot 0.7}{7335}}=\sqrt{2.83\cdot10^5}= 0.00535$

The margin of error is 0.01. We can use this value to determine the level of confidence that represents.

The formula for the margin of error is:

$E=z\cdot \sigma_p=0.01\\\\z\cdot 0.0535=0.01\\\\z=1.87$

This z-value, according to the the standard normal distribution, corresponds to a confidence interval of 94%.

The interval for this margin of error is:

$p-E\leq \pi \leq p+E\\\\0.30-0.01\leq \pi \leq 0.30+0.01\\\\0.29\leq \pi \leq 0.31$

Then, we can conclude that the population proportion is expected to be between 0.29 and 0.31 with a 94% degree of confidence.

3 0

4 years ago

A grocery store wants to examine the relationship between the sales amounts each day at two different locations, store A and sto

Lemur [1.5K]

Answer: 40,000

Step-by-step explanation:

8 0

3 years ago

How to write all real numbers in set notation?

laila [671]

Hi, this is the notation for inclusion of all real numbers.

$x \in \mathbb{R}$

We can also state numbers which are positive or negative with a sign on top of the R notation like so:

$x \in \mathbb{R}^{+} \text{ or } x \in \mathbb{R}^{-}$

7 0

3 years ago