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lianna [129]
1 year ago
14

What is the area of the following 2D figure? Assume a = 7 ft., b = 5 ft., and c = 9 ft. a b C​

Mathematics
1 answer:
Komok [63]1 year ago
3 0

The area of the 2-D figure = area of trapezoid + area of rectangle = 85 ft.².

<h3>What is the Area of a 2D-Figure?</h3>

The area of the 2-D figure that is shown is, A = 1/2(a + c)b + (b)(c).

Given the following:

  • a = 7 ft.
  • b = 5 ft.
  • c = 9 ft.

Plug in the values:

Area = 1/2(7 + 9)5 + (5)(9)

Area = 85 ft.²

Learn more about area of 2-D figure on:

brainly.com/question/16058516

#SPJ1

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Use the figure to find the measure of the angle.Explain your reasoning.
sammy [17]

angle2=180-152=28

angle3=28

angle4=152

angle5=152

angle6=28

angle7=28

angle8=152

3 0
3 years ago
A roll of ribbon is 32 cm long. How many pieces 11 cm long can be cut from the roll?​
Leno4ka [110]

Answer:

2.9 cm long

Step-by-step explanation:

32÷11 = 2.9000000

there is no value of zero after point so it is 2.9 wwith out zero

6 0
2 years ago
Read 2 more answers
Explanation A random sample of 100 observations from a normally distributed population possesses a mean equal to 83.2 and a stan
Olenka [21]

Answer:

The 95% confidence interval would be given by (81.933;84.467)    

Step-by-step explanation:

1) Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X=83.2 represent the sample mean

\mu population mean (variable of interest)

s=6.4 represent the sample standard deviation

n=100 represent the sample size  

Confidence interval

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:

df=n-1=100-1=99

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,99)".And we see that t_{\alpha/2}=1.98

Now we have everything in order to replace into formula (1):

83.2-1.98\frac{6.4}{\sqrt{100}}=81.933    

83.2+1.98\frac{6.4}{\sqrt{100}}=84.467

So on this case the 95% confidence interval would be given by (81.933;84.467)    

7 0
3 years ago
The graph shows the number of boys and girls who purchased different types of food.
Nadusha1986 [10]
CheeseBurgers is the answer
3 0
3 years ago
Read 2 more answers
In this scatterplot the individuals are states. The variable "cig" is the number of cigarettes sold per person in the state in 1
Ipatiy [6.2K]

Answer:

e= -5.41

Step-by-step explanation:

Hello!

In linear regression, a residual value is a distance between the observed values and the regression line.

The residual value (e) is calculated as the difference between the observed value (Y) and the predicted value (^Y).

e= Y - ^Y

e= 15.92 - 21.33 = -5.41

I hope it helps!

5 0
3 years ago
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