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3 years ago

3is what percent of 8

2 answers:

7 0

3 is what percent out of 8
Can also be written as 3/8
To turn a fraction into a percentage, divide the numerator by the denominator and them multiply by 100
3/8 = 0.375
0.375 x 100 = 37.5
37.5%

igor_vitrenko [27]3 years ago

4 0

<span>3 is what percent of 8?

3/8

Decimal:-

3 </span>÷ 8 = 0.375

percentage:-

0.375 × 100 = 37.5
37.5%

3 is 37.5% of 8.

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At Joe's Grocery, you can buy hot dogs only in packages of 4 or packages of 7. As a result, you can't buy exactly 9 hot dogs sin

Inessa05 [86]

Answer:

Step-by-step explanation:

Hot Dog packages

4 = 2 *2

7 = 1 * 7

To determine, the largest possible number of hot dogs that you can't get exactly by buying these hot dogs is to determine the LCM ( lowest common multiple of 4 and 7 ) and add 1 to it

LCM of 4 and 7 = 1 * 2 * 2 * 7 = 28

Highest number that combining 7 and 4 packages can't give = 28 + 1 = 29

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3 years ago

Two candles of equal length are lit at the same time. One candle takes 6 hours to burn out, and the other takes 9 hours to burn

GuDViN [60]

Answer:

4.5 hours

Step-by-step explanation:

Given: One candle takes 6 hour to burn out

Other candle takes 9 hours to burn out.

Lets assume the time at which slower burning candle be exactly twice as long as the faster burning one be "x". and lenght of candle initially be "1".

Taking one candle as Candle A

Other candle as Candle B.

As given both the candle is of equal length.

Now, putting up the equation to find the time at which lenght of candle B is twice as candle A.

∴ Length of candle= $2(1-\frac{x}{6} )= (1-\frac{x}{9})$

Solving it knowing length is constant and using distributive property of multiplication

⇒ $2-\frac{2x}{6} = 1-\frac{x}{9}$

subtracting both side by 2

⇒ $\frac{-2x}{6} = -1 -\frac{x}{9}$

Adding both side by $\frac{x}{9}$

⇒ $-\frac{2x}{6} +\frac{x}{9} = -1$

Taking LCD of 9 and 6 as 18

⇒ $\frac{-2x\times 3+x\times 2}{18}= -1$

Multiplying both side by 18

⇒ $-6x+2x= -18$

⇒ $-4x= -18$

Multiplying both side by -4

⇒ x= $\frac{-18}{-4}= \frac{9}{2}$

∴ x= 4.5 hours

Hence, 4.5 hours is the time at which slower burning candle be exactly twice as long as the faster burning one.

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3 years ago

Name the mathematical property for an equation

kirza4 [7]

Answer:

There are four basic properties of numbers: commutative, associative, distributive, and identity.

I hope this helped :)

4 0

4 years ago

Avoiding an accident while driving can depend on reaction time. Suppose that reaction time, measured from the time the driver fi

Nadya [2.5K]

Answer:

2.5% of drivers have a reaction time more than 2.14 seconds

16% of drivers have a reaction time less than 1.78 seconds

84% of drivers have a reaction time less than 2.02 seconds

Step-by-step explanation:

The Empirical Rule(68-95-99.7 rule) states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

The normal distribution is symmetric, which means that 50% of the measures are below the mean and 50% are above.

In this problem, we have that:

Mean = 1.9s

Standard deviation = 0.12

What percentage of drivers have a reaction time more than 2.14 seconds?

2.14 = 1.9 + 2*0.12

So 2.14 is two standard deviations above the mean.

Of the 50% of the measures above the mean, 95% are within 2 standard deviations of the mean, so, below 2.14. The other 5% is above.

0.05*0.5 = 0.025

2.5% of drivers have a reaction time more than 2.14 seconds

What percentage of drivers have a reaction time less than 1.78 seconds?

1.78 = 1.9 - 0.12

So 1.78 is one standard deviation below the mean.

Of the 50% of the measures that are below the mean, 68% are within one standard deviation of the mean, that is, greater than 1.78.

100 - 68 = 32

0.32*50 = 0.16

16% of drivers have a reaction time less than 1.78 seconds

What percentage of drivers have a reaction time less than 2.02 seconds?

2.02 = 1.9 + 0.12

So 2.02 is one standard deviation above the mean.

Of the measures that are below the mean, all are below 2.02.

Of those that are above, 68% are below 2.02.

0.5 + 0.68*0.5 = 0.84

84% of drivers have a reaction time less than 2.02 seconds

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3 years ago

How much money is three dimes

Feliz [49]

Answer:

30 Cents

Step-by-step explanation:

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3 years ago

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