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3 years ago

PLEASE HELP THIS IS URGENT!!!!

Mathematics

1 answer:

vichka [17]3 years ago

6 0

Answer:

I believe it would be 21 units . dont let extra line's confuse you just pay attention to the letters its asking for

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Does this image have a vertical reflection, horizontal reflection, and rotation? I'll give brainiest!

ElenaW [278]

Answer:

Reflection with respect to the x axis

Step-by-step explanation:

Reflection with respect to the x avis, or horizontal reflection.

3 0

3 years ago

A study of the relationship between age and various visual functions (such as acuity and depth perception) reported the followin

maks197457 [2]

Answer:

(a) $\sum x_i=56.68$ and $\sum x_i^2=197.46$

(b) The sample variance is $s^2=0.530$ and the sample standard deviation is $s=0.728$

Step-by-step explanation:

(a)

The sum of these 17 sample observations is

$\sum x_i=2.79\:+2.57+\:2.73\:+3.75\:+2.27+\:2.75+\:4.00+\:4.22+\:3.88+\:4.35+\:3.41+\:4.57+\:2.38+\:3.73\:+2.75+\:3.47+\:3.06\\\\\sum x_i=56.68$

and the sum of their squares is

$\sum x_i^2=2.79^2\:+2.57^2+\:2.73^2\:+3.75^2\:+2.27^2+\:2.75^2+\:4.00^2+\:4.22^2+\:3.88^2+\:4.35^2+\:3.41^2+\:4.57^2+\:2.38^2+\:3.73^2\:+2.75^2+\:3.47^2+\:3.06^2\\\\\sum x_i^2=197.46$

(b)

The sample variance, denoted by $s^2$ , is given by

$s^2=\frac{S_{xx}}{n-1}$

where $S_{xx} =\sum x_i^2-\frac{(\sum x_i)^2}{n}$

Applying the above formula we get that

$S_{xx}=197.46-\frac{(56.68)^2}{17}\\\\S_{xx} =8.482$

$s^2=\frac{8.482}{17-1}=0.530$

The sample standard deviation, denoted by <em>s</em>, is the (positive) square root of the variance:

$s=\sqrt{s^2}$

Applying the above formula we get that

$s=\sqrt{0.530}=0.728$

3 0

3 years ago

What is the volume of corn held in this cone-shaped grain silo? Use 3.14 for π and round to the nearest cubic foot. Enter your a

MrRa [10]

Answer:

3014 cubit foot

Step-by-step explanation:

Find the diagram attached

Volume of the cone = 1/3πr²h

r is the base radius of the cone

h is the height

Given

r = 6ft

Get the height using the pythagoras theorem

h² = 10² - 6²

h² = 100 - 36

h² = 64

h = √64

h = 8ft

Get the volume

Volume = 1/3πr²h

Volume = 1/3 * 3.14 * 6^2*8

Volume = 3.14 * 12 * 8

Volume =3,014.4

Volume = 3014 cubit foot to the nearest foot

4 0

3 years ago

{1+8+27+64+125...} find the next 9 terms

Bogdan [553]

Answer: 216, 343, 512, 729, 1000, 1331, 1728, 2197, 2744

Step-by-step explanation: The terms are the cubes of the numbers 1, 2, 3, 4, 5...

5 0

3 years ago

Read 2 more answers

The length and breadth of a rectangular field are 50 m and 40 m respectively. Find the distance travelled by a boy in walking al

Naily [24]

Answer:

180M (1 round); 900M (5 rounds)

Step-by-step explanation:

Solve for perimeter with is 2L + 2 W.

1. 2(50) + 2 (40) =

2. 100 + 80 = 180

He walked 180M for 1 complete round. To determine 5 complete rounds, multiply by 5.

180X5= 900 M

3 0

4 years ago