1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lelu [443]
3 years ago
13

What is the approximate area of a regular heptagon with a side length of 4 inches and a distance from the center to a vertex of

4.6 inches?
Mathematics
1 answer:
jok3333 [9.3K]3 years ago
4 0
Split it into 7 triangles. Half-base of each is 2 so the distance of center to the midpoint of the base is (Pythagoras) square root of (4.62 - 22) = 4.162 triangle is this times 2, and with 7 triangles multiply also by 7 to get an approximate area of 58 sq in. 
You might be interested in
Solve these equations)
tatuchka [14]

Answer:

1. c=-2

2. 0=12 no solution

3. x=4

4. r=3/2

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
g Suppose the population 10-year cumulative incidence of prostate cancer among 70-year old men is 0.06. Further, suppose 260 men
Rainbow [258]

Answer:

There is not enough statistical evidence to conclude that the cumulative incidence of prostrate cancer among 50-year old men differs from that of 70-year old men

Step-by-step explanation:

The population 10 year cumulative incidence of prostrate cancer among 70 year old men, p = 0.06

The number of 50 year old men in the sample, n = 260 men

The number of the sampled men that developed prostrate cancer = 13 men

The significance level, α = 0.05

Let the null hypothesis, H₀: \hat{p} = p

The alternative hypothesis, Hₐ: \hat{p} ≠ p

The standard score, z_{\alpha /2} = 1.96

The test statistic, 'z', is given as follows;

z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p \cdot q}{n}}}

\hat{p} = 13/260 = 0.05

q = 1 - p = 1 - 0.06 = 0.94

Therefore,  \ z=\dfrac{0.05-0.06}{\sqrt{\dfrac{0.06 \times 0.94}{260}}} = \dfrac{\sqrt{9165} }{141} \approx -0.68

From the z-table, we find the p-value as follows;

P(z ≈ -0.68) = 0.24825

Therefore, given that the p-value, 0.24825 is larger than the significance level, α/2 = 0.025, we fail to reject the null hypothesis, and therefore, there is not enough statistical evidence to conclude that the cumulative incidence of prostrate cancer among 50-year old men differs from that of 70-year old men

5 0
3 years ago
If isme estimated that there are 50 students in the seventh grade class but there are actually 40 what is isme’s percent error?
Temka [501]

The percent error is 25 %

<em><u>Solution:</u></em>

Given that it is estimated that there are 50 students in the seventh grade class, but there are actually 40

<em><u>To find: percent error</u></em>

Percent error is the difference between a measured and known value, divided by the known value, multiplied by 100%

<em><u>The formula for percent error is given as:</u></em>

\text{ percent error }=\frac{\text { approximate value }-\text {exact value}}{\text { exact value }} \times 100$

Here, exact value = 40 and approximate value or estimated value = 50

Substituting the values in above formula,

\begin{aligned}&\text { percent error }=\frac{50-40}{40} \times 100\\\\&\text { percent error }=\frac{10}{40} \times 100=\frac{100}{4}=25\end{aligned}

Thus the percent error is 25 %

8 0
3 years ago
What is the equation of the axis of symmetry for the parabola y=1/2(x-3)^2+5
Rus_ich [418]

The general vertex form equation of the parabola is

y=a(x-h)^2+k

The Axis of Symmetry is given by

x=h

For the given equation the Equation of the Axis of symmetry for the parabola y=1/2(x-3)^2+5 as x=3.

5 0
3 years ago
PLS HELP ME <br> its due soon
vivado [14]

Answer:

whats the answer???

Step-by-step explanation:

13 was subtracted from a number and that difference was then divided by 5. After which, that quotient was multiplied by 7. The resulting product was -7. What was the number? (

6 0
3 years ago
Other questions:
  • Slice of cake, height 7cm width 20cm need to find volume
    5·1 answer
  • Pls hurry I’ll give brainist Maria heard on the radio that the high temperature that day would be 64°F. To determine the tempera
    5·1 answer
  • PLEASE HELP! URGENT!! A company designs a logo using a kite figure around the letter t.
    13·2 answers
  • Please help me!!!!!!!!!!!!!!!!!!!!!!!!!!!
    13·1 answer
  • How many pounds are in 5 kilograms? in ratios
    13·2 answers
  • The _____of a segment divides the segment into two segments of equal length.
    5·2 answers
  • 14 inches to 2 yards
    12·2 answers
  • Which sequence of transformations performed on shape I confirms the congruence of shape II and shape I?
    12·2 answers
  • 2w ^ 2 + 6 = 5w <br> How do I get rid of the square so I can combine the w’s?
    5·1 answer
  • 4) On Monday Elaine ran 5 miles and 3 laps around a trail. On Tuesday she ran 6 miles and 2 laps around a trail. She ran the sam
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!