Can someone pls help me

If anyone could help it would be greatly appreciated

Ira Lisetskai [31]

Answer:

Step-by-step explanation:

area of one triangle=(1/2)×6×4=12 m²

area of four triangles=4×12=48 m²

area of square=6×6=36 m²

total area=48+36=84 m²

4 0

3 years ago

Type the equation for the graphbelow.Pi/3 2piy = [?] sin([ ]x)

Pie

To find the equation of the graph, what we do is to recognize some characteristics of a sine function:

- Amplitude: The amplitude of the sine function is the distance from the middle value or line running through the graph up to the highest point. In this case, the amplitude is 1.

- Period: The period of a sine function is defined as the length of one complete sine wave or one complete cycle of the curve. It can be found using the equation: P=2pi/B.

Why are these characteristics important?

Because the sine function has the following general form:

In this problem, we have A=1 and we know that the period equals 2pi/3. So,

Therefore, the equation of the graph is:

8 0

1 year ago

The graph shows which inequality???

Andreyy89

Try this option:
1. according to the line on the graph x≥0 and x<9.
2. in answers a;b;c;d;e x<0, only in answer f. √x<3, x>0. It means, that answer 'f' is correct.

answer: f.

7 0

3 years ago

The 2003 Statistical Abstract of the United States reported the percentage of people years of age and older who smoke. Suppose t

Paul [167]

Complete Question

The 2003 Statistical Abstract of the United States reported the percentage of people 18 years of age and older who smoke. Suppose that a study designed to collect new data on smokers and non smokers uses a preliminary estimate of the proportion who smoke of 0.30.

a. How large a sample should be taken to estimate the proportion of smokers in the population with a margin of error of 0.02? use 95% confidence.

b. Assume that the study uses your sample size recommendation in part (a) and finds 520 smokers. What is the point estimate of the proportion of smokers in the population?

c. What is the 95% confidence interval for the proportion of smokers in the population?

Answer:

a

$n = 2017$

b

$\^ p = 0.2578$

c

$0.238 < 0.278$

Step-by-step explanation:

Considering question a

From the question we are told that

The margin of error is $E = 0.02$

The preliminary estimate of the proportion who smoke is $p = 0.30$

From the question we are told the confidence level is 95% , hence the level of significance is

$\alpha = (100 - 95 ) \%$

=> $\alpha = 0.05$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 1.96$

Generally the sample size is mathematically represented as

$n = [ \frac{Z_{\frac{\alpha }{2} } }{E} ] ^2 * p(1 - p )$

=> $n = [ \frac{1.96 }{0.02} ] ^2 * 0.30(1 - 0.30 )$

=> $n = 2017$

Considering question b

From the question we are told that

The number of smokers is k = 520

Generally the point estimate of the proportion of smokers in the population is mathematically represented as

$\^ p = \frac{520 }{2017 }$

=> $\^ p = 0.2578$

Considering question c

Generally 95% confidence interval is mathematically represented as

$\^ p -E < p < \^ p +E$

=> $0.2578 - 0.02 < 0.2578 + 0.02$

=> $0.238 < 0.278$

7 0

3 years ago

A manatee eats the equivalent of about 12% of its body weight each day. Write an equation that represents the amount y (in pound

san4es73 [151]

Y is the amount of food that a manatee eats each day:
the weight is X
12% or its weight is X x 12 /100= 12x /100=3x/25
so the equation is y= 3x/25
the dependent variable is y (it depends to the value of x)
and the independent is x

5 0

3 years ago