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marissa [1.9K]
3 years ago
14

Shown here is a frequency distribution for the rise in tides at 30 selected locations in the U.S.Find the variance and standard

deviation
Mathematics
2 answers:
SSSSS [86.1K]3 years ago
8 0
It’s is going to be 15 since 30/2 equals 15
stiks02 [169]3 years ago
4 0
Answer: 15 since 30/2 equals 15
hope this helps:D


plz give me brainiest
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he sum of the first two terms of a G.P is 27 whereas the sum of the second and third term is 54. Find the first term and the com
viktelen [127]

Answer:

{ \tt{sum =  \frac{a(r {}^{n - 1} )}{n - 1} }} \\ 27 =  \frac{a(r {}^{2 - 1} )}{2 - 1}  \\ { \bf{27 = ar -  -  - (i)}} \\  \\ 54 =  \frac{a( {r}^{3 - 1} )}{3 - 1}  \\ { \bf{108 = a {r}^{2} -  -  - (ii) }} \\ { \tt{(ii) \div (i) : }} \\ r =  \frac{108}{27}  \\ { \bf{common \: ratio = 4}} \\ { \bf{first \: term =  \frac{27}{4}  }}

7 0
3 years ago
$9,400 x 8% commission rate
marin [14]

the commission rate is 752.

3 0
2 years ago
A training field is formed by joining a rectangle and two semicircles, as shown below. The rectangle is 89m long and 70m wide.
Sindrei [870]

Step One

Find the area of the rectangle

Area = L * W

Area = 89 cm * 70 cm

Area = 6230 cm^2

Step Two

What is the formula for the two end semicircles?

Two semicircles = 1 whole circle

Area of any circle = pi * r^2

Step Three

Find the area of the circle

r = the width / 2     This may not be true. You need the diagram. If the circles are drawn on the length then use r = the length / 2

r = 70/2  = 35 cm

Area of circle = pi * r^2

Area of circle = 3.14 * 35^2

Area of circle = 3846.5

Step Four

Find the total area

The total area = Area of the rectangle + area of circle

The total area = 6230 + 3846.5

The total area = 10076.5 cm^2 <<<< Answer

3 0
3 years ago
Which is greater? 0.8 or 3/4
miskamm [114]
0.8 is greater because 3/4 equals .75 
7 0
3 years ago
Read 2 more answers
The grocery store sells kumquats for $5.00 a pound and Asian pears for $3.25 a pound. Write an equation in standard form for the
aniked [119]
Okay so your equation is going to be : 18= 5k + 3.25p
3 0
3 years ago
Read 2 more answers
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