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Oksana_A [137]
3 years ago
10

HELP VERY QUICKLY!!!!!!

Mathematics
2 answers:
IrinaK [193]3 years ago
8 0

Answer:

<em>4:3</em>

Step-by-step explanation:

<em>BRAINLY</em>

<em>please:)</em>

NeX [460]3 years ago
4 0

Answer:

4:3

Step-by-step explanation:

4:3, there are 4 squares to 3 triangles i think this answers both questions.

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A student solved for the radius of a circle with a circumference of 12π
padilas [110]

Answer:

Step 4 is incorrect  he did not divide correctly from step3 to step 4

Step-by-step explanation:

The circumference of a circle is

C = 2 * pi *r

We know the circumference is 12 pi

12pi = 2 pi *r

Divide each side by 2 pi

12 pi/2pi = 2pi r/ 2pi

6 = r

From step 3 The student did not cancel the pi in the top and the bottom on the right hand side to isolate r

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3 0
3 years ago
An e-commerce research company claims that 60% or more graduate students have bought merchandise on-line at their site. A consum
Rasek [7]

Answer:

We accept H₀ we don´t have enough evidence to conclude that a consumer group position is correct

Step-by-step explanation:

We have a case of test of proportion, as a consumer group is suspicious of the claim and think the proportion is lower we must develop a one tail test (left tail) Then

1.- Test hypothesis:

Null hypothesis  H₀                   P = P₀

Alternative hypothesis  Hₐ       P < P₀

2.- At significance level of α  = 0,05   Critical value

z(c)  =  -1,64

3.-We compute z(s) value as:

z(s)  =  ( P - P₀ )/ √P*Q/n      where   P = 44/80     P = 0,55   and Q = 0,45

P₀ = 0,6   and  n = 80

Plugging all these values in the equation we get:

z(s)  = ( 0,55 - 0,6 ) / √(0,2475/80)

z(s)  =  - 0,05/ √0,0031

z(s)  =  - 0,05/0,056

z(s)  =  - 0,8928

4.-We compare  z(s)  and  z(c)

z(s) > z(c)      -0,8928 on the left side it means that z(s) is in the acceptance region so we accept H₀

7 0
3 years ago
um sapato é vendido a r$ 180,00. se a compra for a vista a loja oferece um desconto de 10%. qual o valordo sapato na compra a vi
WARRIOR [948]

Preço de um sapato = $ 180,00

Desconto concedido se o sapato for comprado em dinheiro = 10%

Custo do calçado quando comprado à vista :

=\tt 180 - 10\%  \:  \: de  \:  \: 180

= \tt180 -  \frac{10}{100}  \times 180

=\tt180 -  \frac{10 \times 180}{100}

= \tt180 -  \frac{1800}{100}

=\tt 180 - 18

\color{plum} =\tt\$162.00

▪︎<em>Assim, preço do sapato quando comprado em dinheiro = $ 162,00</em>

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