I need help I really don't know how to do this ??

Mathematics

2 answers:

WARRIOR [948]3 years ago

6 0

Think of this as a sandwich. the sandwich is a quadrilateral. if you cut it in half diagonally, it becomes 2 triangles (I hoped this helped I'm not so great at analogies)

snow_lady [41]3 years ago

5 0

We can divide a square or a quadrilateral into two triangles. This gives us that the area of a triangle is half the area of the quadrilateral with the same base and height.

You might be interested in

What is the answer on this 3abc + bc - a

Alex17521 [72]

3b^2c^2 is the answer i’m pretty sure

8 0

3 years ago

How much interest is earned on$2,700 in one year if it is invested at 3%

topjm [15]

Answer:81

Step-by-step explanation:

2700 x 0.03

3 0

3 years ago

Read 2 more answers

Franchise Business Review stated over 50% of all food franchises earn a profit of less than $50,000 a year. In a sample of 130 c

nydimaria [60]

Answer:

We need a sample size of 564.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

$\pi = \frac{81}{130} = 0.6231$

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

Based upon a 95% confidence interval with a desired margin of error of .04, determine a sample size for restaurants that earn less than $50,000 last year.

We need a sample size of n

n is found when $M = 0.04$