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3 years ago

2/7 divided by 2/1 anwser asap

Mathematics

2 answers:

wolverine [178]3 years ago

7 0

The answer is t 2/14

quester [9]3 years ago

3 0

Answer:

are you sure you wrote that right, and if so here: 14285714285/100000000000

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In a survey conducted with 600 participants across the United States, 450 were found to have studied science in college. If we w

Dahasolnce [82]

Confidence interval of a population proportion is given by p^ + or - sqrt(p^(1 - p^)/n); where p^ = 450/600 = 0.75 and n = 600
99.7% convidence interval = 0.75 + or - 2.96 x sqrt(0.75(1 - 0.75)/600) = 0.75 + or - 2.96 x sqrt(0.75(0.25)/600) = 0.75 + or - 2.96 x 0.0177 = 0.75 + or - 0.0524 = 0.697 to 0.803 = 69.7% to 80.3%

7 0

3 years ago

As you might know from reading the Harry Potter books, wizarding money comes in three denominations: bronze Knuts, silver Sickle

Nina [5.8K]

Answer:

Minimun amount = $95,48

Step-by-step explanation:

We need to buy the book that costs 12 galleons, 16 sickles, 25 knuts.

At the bank we need to exchange our dollars. We know that:

1 galleon = $7,35

And:

1 galleon = 17 sickles

1 sickle = 29 knuts

First we use a rule of three to convert everything to galleons:

1 galleon = 17 sickles ⇒ 1 sickle = 1/17 galleons

$\frac{1 galleon}{x}=\frac{17 sickles}{1 sickle}$

$x=\frac{1}{17} sickles$

1 sickle = 1/17 galleons = 29 knuts ⇒ 1 knut = 1/493

$\frac{1/17 galleons}{x}=\frac{29 knuts}{1 knut}$

$x=\frac{1}{493} galleons$

And now we need to convert every wizarding money to dollars by using our reference above:

1 galleon = $7,35

1 sickle = 1/17 galleons = $7,35 / 17 ≅ $0,4323

1 knut = 1/493 galleons = $7,35 / 493 ≅ $0,0149

Finally we calculate the cost of the book:

Galleons: 12 x $7,35 = $88,2

Sickles: 16 x $0,4323 = $6,91

Knuts: 25 x $0,0149 = $0,37

Cost of the book = $88,2 + $6,91 + $0,37 = $95,48

So this is the minimun amount of dollars you need to exchange to purchase the book.

8 0

3 years ago

Emily practices piano for 2/3 of an hour on Monday and 1/2 hour on Wednesdays. How many hours does Emily spend practicing piano

Sergeu [11.5K]

Answer:

50 minutes

Step-by-step explanation:

Given:

$\bullet \ \ \text{Monday:} \ \dfrac{2}{3} \times \text{Hour}\\\\\bullet \ \text{Wednesday:} \ \dfrac{1}{2} \times \text{Hour}$

Since Emily only practiced on Monday and Wednesday, the sum of time on both days is the time Emily practiced on the piano for a week.

$\implies \text{Monday + Wednesday = Total time practiced on piano for a week}$

<u>Substitute the times in the equation</u>

$\implies (\dfrac{2}{3} \times \text{Hour}) + (\dfrac{1}{2} \times \text{Hour}) = \text{Total time practiced on piano for a week}$

<u>Simplify the equation</u>

$\implies (\dfrac{2}{3} \times 60 \ \text{minutes}) + (\dfrac{1}{2} \times 60 \ \text{minutes}) = \text{Total time practiced on piano for a week}$

$\implies (20 \ \text{minutes}) + (30 \ \text{minutes}) = \text{Total time practiced on piano for a week}$

$\implies \boxed{50 \ \text{minutes} = \text{Total time practiced on piano for a week}}$

4 0

2 years ago

PLEASE HELP ITS DUE IN 3 MINTUES

Fed [463]

Answer:

1.150 divided by 0.50

2. 15

Step-by-step explanation:

7 0

3 years ago

Which of the following statements best describes the effect of replacing the graph of f(x) with the graph of f(x) − 3?

exis [7]

Answer:

The graph shifts 3 units down.

Step-by-step explanation:

5 0

3 years ago