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Aleksandr [31]
3 years ago
8

Need help with math homework

Mathematics
1 answer:
Nuetrik [128]3 years ago
5 0

Answer:

c

Step-by-step explanation:

am not sure but I think its C am not shure

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A survey was conducted that asked 1004 people how many books they had read in the past year. Results indicated that x overbarequ
melisa1 [442]

Answer:

Step-by-step explanation:

Given that a survey was conducted that asked 1004 people how many books they had read in the past year.

Results are:

x bar =12.5

s = 16.6

n = 1004

Std error of sample = \frac{s}{\sqrt{n-1} } =\frac{16.6}{\sqrt{1003} }\\=0.524152\\=0.524

Since population std dev is not known t critical value can be used for confidence interval.

df = 1004-1 =1003

t critical = 1.96

Margin of error = 1.96(std error) =1.027

Confidence interval lower bound = 12.5-1.027 = 11.473

Upper bound = 12.5+1.027 = 13.527

6 0
2 years ago
PLEASE I WILL GIVE BRAINLIEST..................don't do it A
Ivahew [28]

Step-by-step explanation:

b.3n/2 = 7/2

6n = 14

n = 2 1/3

c.-x/2 + 6 = -13/4

-x/2 = -37/4

-4x = -74

x = 18 1/2

d.3x/10 = 2/5

15x = 20

x = 1 1/3

e.x/10 = -20/3

3x = -200

x = -66 2/3

f.269x/56 = 10

269x = 560

x = 2 22/269

5 0
3 years ago
HELP FAST I WILL MARK AS BRAINLIEST.
vodka [1.7K]

Answer:

  • s = 1/3(a + b + c + 16)

Step-by-step explanation:

<h3>Given</h3>
  • If (s -a) = 5cm, (s -b) = 10cm, (s -c) = 1cm
  • s = ?
<h3>Solution</h3>

<u>Add up the 3 equations and solve for s:</u>

  • s - a + s - b + s - c = 5 + 10 + 1
  • 3s = 16 + a + b + c
  • s = 1/3(a + b + c + 16)
7 0
3 years ago
Pleaassseeeee helpppppp,,,,!!!!!!
Flura [38]
Surface Area (SA) of a Cylinder formula:
SA = 2*pi*r*h+2*pi*r^2
If you fill in the formula:
SA = 2*3.14*2*9+2*3.14*2^2
Simplify:
SA = 6.28*18+6.28*4
SA = 113.04 + 25.12
SA = 138.16 in
I hope I helped 
If its wrong I'm super duper extra sorry!
6 0
3 years ago
A rose garden Is formed by jolning a rectangle and a semicircle, as shown below. The rectangle Is 23 ft long and 14 ft wide.Find
Ratling [72]

Answer:

Area of the garden:

\begin{equation*} 398.93\text{ ft}^2 \end{equation*}

Explanation:

Given the below parameters;

Length of the rectangle(l) = 23 ft

Width of the rectangle(w) = 14 ft

Value of pi = 3.14

Since the width of the rectangle is 14 ft, so the diameter(d) of the semicircle is also 14 ft.

The radius(r) of the semicircle will now be;

r=\frac{d}{2}=\frac{14}{2}=7\text{ ft}

Let's now go ahead and determine the area of the semicircle using the below formula;

A_{sc}=\frac{\pi r^2}{2}=\frac{3.14*\left(7\right)^2}{2}=\frac{3.14*49}{2}=\frac{153.86}{2}=76.93\text{ ft}^2

Let's also determine the area of the rectangle;

A_r=l*w=23*14=322\text{ ft}^2

We can now determine the area of the garden by adding the area of the semicircle and that of the rectangle together;

\begin{gathered} Area\text{ of the garden = Area of semi circle + Area of rectangle } \\ =76.93+322 \\ =398.93\text{ ft}^2 \end{gathered}

Therefore, the area of the garden is 398.93 ft^2

8 0
1 year ago
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