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Vilka [71]
3 years ago
12

An octagon has side length 10.9 in. The perimeter of the octagon is 87.2 in cm and the area is 392.4 in2. A second octagon has c

orresponding side lengths equal to 21.8 in. Find the area of the second octagon. Round to the nearest hundredth.
98.1 in2

1569.6 in2

784.8 in2

196.2 in2
Mathematics
2 answers:
Lana71 [14]3 years ago
8 0
If the figures/solids are similar, the ratio of the areas is equal to the square of the ratio of the corresponding sides. Let x be the area of the second figure. The equation that would best allow us to answer this item is,
                      (394.2 in² / x in²) = (10.9 / 21.8)²
The value of x from the equation is 1576.8 in².

Thus, the nearest answer is the second choice. 
Murljashka [212]3 years ago
3 0

Answer:

1569.6 in2

Step-by-step explanation:

(392.4 in² / x in²) = (10.9 / 21.8)²

The value of x from the equation is 1569.6 in2

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It has been reported that men are more likely than women to participate in online auctions. In a recent​ survey, 65% of responde
vivado [14]

Answer:

0.84 or 84%

Step-by-step explanation:

Let 'n' be number of people who took the survey, the number of men who answered the survey is 0.45n. The number of men who answered the survey and have participated in online auctions is 0.38n. Therefore, choosing from the population of men who took the survey (0.45n) the probability that a respondent had participated in an online auction is:

P =\frac{0.38n}{0.45n}\\P=0.84

8 0
3 years ago
F(x)=(5x+3)(x−2)(3x+7)(x+5) has zeros at x = -5, x = -7/3, x = 2
musickatia [10]

The sign of f on the interval -7/3 < x < -3/5 is always positive.

<h3>How to solve for the sign on the interval</h3>

We have the equation

(5x+3)(x−2)(3x+7)(x+5) > 0

Now when f(x) > 0

Then -7/3 < x < -3/5

This would tell us that the sign would become positive when it changes from the less than to greater than sign

<h3>Complete Question</h3>

f(x)=(5x+3)(x-2)(3x+7)(x+5) has zeros at x=-5, x=-7/3, x=-3/5, and x=2

What is the sign of f on the interval -7/3<x<-3/5?

answer choices

f is always positive on the interval

f is always negative on the interval

f is sometimes positive and sometimes negative on the interval

f is never positive or negative on the interval

Read more on polynomials here:

brainly.com/question/2833285

#SPJ1

5 0
2 years ago
With an x intercept of 5 and a y intercept of -5
stealth61 [152]

Answer:

-25

Step-by-step explanation:

8 0
3 years ago
2y=-8 which set of steps shows the solution to the equation
Rainbow [258]
2y=-8
We need to clear "y" with inverse operations.

y= -8/2      if 2 was multiplying now is dividing
y= -4

6 0
3 years ago
Read 2 more answers
A right rectangular prism has a length of 5 centimeters, a width of 8 centimeters, and a height of 4 centimeters. What is the vo
Troyanec [42]

Answer:

volume of prism is 160 cm

6 0
3 years ago
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