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2 years ago

For 7/20 what is an equivalent fraction with a denominator of 100

Mathematics

2 answers:

stiv31 [10]2 years ago

7 0

100/20=5
7×5=35
35/100

Paladinen [302]2 years ago

5 0

Start with 7/20 .

We can multiply the denominator by anything we want to,
but if we do that, we must immediately multiply the numerator
by the same thing, to avoid changing the value of the fraction.
(I guess you could call this process "un-simplifying" the fraction.)

The denominator is 20 right now, and we want it to be 100 .
So we have to multiply it by 5 .

Immediately, before we forget, we must also multiply the numerator by 5 .

So we end up with 35/100 .

This fraction has exactly the same value as 7/20 .
You should prove that for yourself by simplifying 35/100 .

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What would 23 divided by 6 = 3 R5 look as a mixed number?

masha68 [24]

23/6 = 3 and 5/6. You would just put the remainder over the number you divided by

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3 years ago

31.75 as a improper and mixed fraction

Aleksandr [31]

31.75 as an improper fraction is 127/4. The mixed number fraction is 31 3/4.

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3 years ago

Production times are evenly distributed between 8 and 15.8 minutes and production times are never outside of this interval. What

dezoksy [38]

Answer:

29.49% probability that a production time is between 9.7 and 12 minutes

Step-by-step explanation:

An uniform probability is a case of probability in which each outcome is equally as likely.

For this situation, we have a lower limit of the distribution that we call a and an upper limit that we call b.

The probability that we find a value X between c and d, in which d is greater than c, is given by the following formula.

$P(c \leq X \leq d) = \frac{d - c}{b-a}$

Production times are evenly distributed between 8 and 15.8 minutes and production times are never outside of this interval.

This means that $a = 8, b = 15.8$

What is the probability that a production time is between 9.7 and 12 minutes?

$d = 12, c = 9.7$ .

$P(c \leq X \leq d) = \frac{d - c}{b-a}$

$P(9.7 \leq X \leq 12) = \frac{12 - 9.7}{15.8 - 8} = 0.2949$

29.49% probability that a production time is between 9.7 and 12 minutes

5 0

3 years ago

Human visual inspection of solder joints on printed circuit boards can be very subjective. Part of the problem stems from the nu

olga_2 [115]

Answer:

The probability that the selected joint was judged to be defective by neither of the two inspectors is $P(A' n B' ) = 0.8855$

The probability that the selected joint was judged to be defective by inspector B but not by inspector A is $P(A' n B) =0.0403$

Step-by-step explanation:

From the question we are told that

The sample size is $n_s = 10000$

The number of outcome for inspector A is $n__{A}} = 742$

The number of outcome for inspector B is $n__{B}} = 745$

The number of joints judged defective by both inspector is $n(A u B) = 1145$

The the probability that the selected joint was judged to be defective by neither of the two inspectors is mathematically represented as

$P(A' n B' ) = 1 - P(A u B)$

Now

$P(A\ u \ B) = \frac{n(Au B)}{n_s }$

substituting values

$P(A\ u \ B) = \frac{1145}{ 10 000 }$

$P(A' n B' ) = 1 - \frac{1145}{10 000}$

$P(A' n B' ) = 0.8855$

the probability that the selected joint was judged to be defective by inspector B but not by inspector A is mathematically represented as

$P(A' n B) = P(A \ u \ B) -P(A)$

Now

$P(A) = \frac{n__{A}}{n_s}$

substituting values

$P(A) = \frac{742}{10 000}$

$P(A' n B) = \frac{1145}{10 000} - \frac{742}{10 000}$

$P(A' n B) =0.0403$

7 0

3 years ago

Brand A: $5 for 80 pounds of sand Brand B: $14 for 175 pound bag Which is the better buy?

nevsk [136]

Answer:

Brand A is the better buy

Step-by-step explanation:

bag Which is the better buy?

Step one

Brand A: $5 for 80 pounds of sand

Let us find the unit cost

Unit cost =5/80

=$0.0625 per pound

Brand B: $14 for 175 pound

The unit cost is

=14/175

=$0.08 per pound

4 0

2 years ago