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alukav5142 [94]
3 years ago
15

60 POINTS!!

Mathematics
2 answers:
tatyana61 [14]3 years ago
8 0
The correct answers are
A. 144
B. No
Step2247 [10]3 years ago
5 0

Answer:

A 144

B no

Step-by-step explanation:

Decagon is a 10 sided figure

interior angle = 180 (n-2)/n where n=10

                         180*(10-2)/10

                           180*8/10

                           144

To tessellate, the angle must divide evenly into 360

360/144= 2.5

This is not evenly so it will not tessellate

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pashok25 [27]

Answer:

\frac{dN}{dt}=k(725-N)\\separating the variables and integrating\\\int \frac{dN}{725-N}=\int kdt+c\\-log (725-N)=kt+c\\log (725-N)=-kt-c\\(725-N)=e^{-kt-c} =e^{-kt} *e^{-c} =Ce^{-kt} \\when t=0,N=400\\725-400=Ce^{0} =C\\C=325\\when t=3,N=650\\725-650=325e^{-3k} \\\frac{75}{325}=(e^{-k})^3\\\\e^{-k} =(\frac{3}{13}) ^{\frac{1}{3} } \\when t=5\\725-N=325(\frac{3}{13}) ^{\frac{5}{3} } =325*\frac{3}{13}*(\frac{3}{13} )^{\frac{2}{3}}\\N=725-75*(\frac{3}{13} )^{\frac{2}{3} }=725-28=697

Step-by-step explanation:

6 0
3 years ago
Billy has x marbles. Write an
babymother [125]

Answer:

Charlie = 5 + x

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Step-by-step explanation:

Given

Billy's Marble = x

Required

Determine a,b and c

a. Charlie's Marble

"5 more" means 5 + or + 5

Since Billy's Marble is represented with x, then Charlie's Marbles will be

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b. Danny's Marbles

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Since Billy's Marble is represented with x, then Danny's Marbles will be

Danny = x - 8

c. Eric Marbles

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Since Billy's Marble is represented with x, then Danny's Marbles will be

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3 0
3 years ago
The drawing shows a person looking at a building on top of which an antenna is mounted. The horizontal distance between the pers
prohojiy [21]
Consider the triangles formed by the lines of sight in parts a and b. In part a, the distance from the horizontal to the base of the antenna is 82.0*tan31.0º; in part b, the distance from the horizontal to the top is 82.0*tan34.2º. The antenna height is the difference between these 

<span>h = 82.0*tan34.2º - 82.0*tan31.0º = 82.0*(tan34.2º - tan31.0º) = 6.46 m</span>
5 0
3 years ago
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kirill [66]

Answer:

b

Step-by-step explanation:because

5 0
3 years ago
Read 2 more answers
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Bingel [31]

Answer:

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Step-by-step explanation:

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3 0
3 years ago
Read 2 more answers
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