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2 years ago

HELPPPPP ASAPPPPPPPPPPPPPPPP PLSSS

Mathematics

1 answer:

balandron [24]2 years ago

4 0

Answer:

B) 2\ sq.rt{3}units

Step-by-step explanation:

using Pythagoras theorem

a^2+ b^2=c^2

a^2+ 3^2=(√21)^2

a^2+9= 21

a^2=21-9

a^2=12

a=√12

a=2√3

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Refer to the previous exercise. The researchers wanted a sufficiently large sample to be able to estimate the probability of pre

Maru [420]

Answer:

The large sample n = 117.07

Step-by-step explanation:

Step(i):-

Given that the estimate error (M.E) = 0.08

The proportion (p) = 0.75

q =1-p = 1- 0.75 =0.25

Level of significance = 0.05

Z₀.₀₅ = 1.96≅ 2

Step(ii):-

The Marginal error is determined by

M.E = $\frac{Z_{0.05} \sqrt{p(1-p)} }{\sqrt{n} }$

$0.08 = \frac{2 X \sqrt{0.75(1-0.75)} }{\sqrt{n} }$

Cross multiplication , we get

$\sqrt{n} = \frac{2 X \sqrt{0.75(1-0.75)} }{0.08 }$

√n = $\frac{2 X0.4330}{0.08} = 10.825$

squaring on both sides , we get

n = 117.07

Final answer:-

The large sample n = 117.07

6 0

2 years ago

° ~ Calculate the percentage ~ ° Help please !! With T_T operations

natulia [17]

Step-by-step explanation:

please re ask question. its unvalid and please simplfy it

4 0

2 years ago

Please help me thank you and show all work

AleksAgata [21]

Proportional:
82.8 / 92 = 0.9
73.8 / 82 = 0.9
so
FG / 47 = 0.9
FG = 47 * 0.9
FG = 42.3

answer

The distance between 2 campsites is 42.3 m.

8 0

2 years ago

Find the area of the figure below

satela [25.4K]

Answer:

The total area is 300 ft^2

Step-by-step explanation:

First find the area of the rectangle

A = l*w = 24*10 = 240

Then find the area of the triangle on the top

A = 1/2 bh

The base is 24 and the height is 15-10 = 5

A = 1/2 (24)*5 = 60

Add them together

240+60 = 300

The total area is 300 ft^2

7 0

2 years ago

Read 2 more answers

Marking as brainliest

fredd [130]

Answer:

13.1 (3sf)

Step-by-step explanation:

14 ^2 - 5^2 = 171

root 171 = 13.1 (3sf)

5 0

2 years ago

Read 2 more answers