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3 years ago

PLEASE HELP

Mathematics

1 answer:

vodka [1.7K]3 years ago

6 0

Proportional mate try that maybe then

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On day 1 Vampire

svlad2 [7]

Answer:

Step-by-step explanation:

Initial number of hours = 5
Increased number of hours = 7

<u>Change</u>:

7 - 5 = 2

<u>Percent change:</u>

2/5*100% = 40%

7 0

3 years ago

Round 11 580 to 3 significant figures

Dmitriy789 [7]

11,580 to 3 significant figures
Currently, the value has 5 significant figures ( inclusive of 0 )
next to 5, there is 8 and 8 > 5, so 5 rounds up
1.16 x 10⁴

8 0

3 years ago

-2/3 × (2 1/2) × (-3)

masha68 [24]

$\\ \frac{ - 2}{3} \times (2 \frac{1}{2} ) \times ( - 3)$

$\\ = 5$

4 0

3 years ago

Read 2 more answers

Multiply 23.35 times 1000

SCORPION-xisa [38]

Answer:

23350

Step-by-step explanation:

you multiply. 23.35×1000

4 0

3 years ago

Read 2 more answers

Suppose that in a random selection of 100 colored candies, 26% of them are blue. The candy company claims that the percentage

quester [9]

Answer: a) -0.2252, b) 0.8219

Step-by-step explanation:

Since we have given that

Sample size n = 100

Probability that candies are blue = p= 0.26

Probability that company claims that it is blue candy = P = 0.27

So, Q = 1-P= 1-0.27 = 0.73

So, Null hypothesis : $H_0:p=P$

Alternate hypothesis : $H_1:p\neq P$

So, the test statistic would be

$z=\dfrac{p-P}{\sqrt{\dfrac{P.Q}{n}}}\\\\z=\dfrac{0.26-0.27}{\sqrt{\dfrac{0.27\times 0.73}{100}}}\\\\z=-0.2252$

Since α = 0.05

So, critical value of z = 1.96

p-value = P(Z>Z(calculated)

Using the excel function , we get that

$P(z>0.2252)\\\\=2\times 0.410.911845\\\\=0.8219$

Hence, a) -0.2252, b) 0.8219

6 0

3 years ago