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hoa [83]
3 years ago
13

Ray delivered 3/8 of the newspapers on his route in the first hour and 4/5 of the rest in the second hour what fraction of the n

ewspapers did Ray deliver in the second hour?
Mathematics
1 answer:
Temka [501]3 years ago
8 0

Answer:

\frac{1}{2}

Step-by-step explanation:

Let the total number of Newspapers be x

Number of newspapers delivered in first hour of his route= \frac{3}{8} of x

Total number of newspapers delivered in first hour= \frac{3}{8}x

Number of newspapers left= x-\frac{3x}{8}

Number of newspapers left=\frac{8x-3x}{8}

Number of newspapers left=\frac{5x}{8}

Number of newspapers delivered in second hour=4/5 of\frac{5x}{8}

Number of newspapers delivered in second hour=\frac{x}{2}

Fraction of newspapers delivered in second hour is=\frac{1}{2}

Hence, the correct answer is \frac{1}{2}

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The popping-times of the kernels in a certain brand of microwave popcorn are
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Answer:

The z-score for this kernel is -2.3

Step-by-step explanation:

* Lets revise how to find the z-score

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# x is the score

# μ is the mean

# σ is the standard deviation

* Lets solve the problem

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- The standard deviation is 10 seconds

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* The z-score for this kernel is -2.3

7 0
3 years ago
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Step-by-step explanation:

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Step-by-step explanation:

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What are the explicit equation and domain for a geometric sequence with a first term of 2 and a second term of −8?
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The common ratio in a geometric sequence is the ratio between 2 consecutive terms:

-8/2=-4, 

then the sequence is  2, -8, 32, -128, -512, 2048, ...

let a_n be the nth term of the sequence, then 

a_1= 2
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.
.
.
so clearly a_n=2(-4)^{n-1}

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Answer:

<span>C. an=2(-4)^n-1; all integers where n>0</span>
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4 years ago
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