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skelet666 [1.2K]
3 years ago
12

In a day, Robin spends 6 hours at school, sleeps for 9 hours, plays for 3 hours, and spends the rest of the time doing other thi

ngs. Robin spends ______% of the day playing and _____% of the day doing things other than sleeping, playing, or going to school.
Mathematics
2 answers:
Nataliya [291]3 years ago
8 0

Answer:

Robin spends 12.5% of the day playing and 25% of the day doing things other than sleeping, playing, or going to school.

Step-by-step explanation:

In a day, Robin spends his time :

At school = 6 hours

Sleeps = 9 hours

Plays = 3 hours

Total time spent = 6 + 9 + 3 = 18 hours

Time left = 24 - 18 = 6 hours

doing other things = 6 hours

Now we have to calculate what % of the day he is playing and doing other things.

He spends 3 hours in playing = 3 hours of 24 hours

= 3 ÷ 24 × 100 = 12.5%

He spends 6 hours in doing other things = 6 hours of 24 hours

= 6 ÷ 24 × 100 = 25%

Robin spends 12.5% of the day playing and 25% of the day doing things other than sleeping, playing, or going to school.

slavikrds [6]3 years ago
5 0
6hrs = school
9hrs = sleeps              = 18hrs // 24hrs      ----6hrs left
3hrs = plays

6hrs = other things


playing = 12.5% -- 3/24                 3/24*100
other things = 25% -- 6/24             6/24*100
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Readme [11.4K]

Answer:

B

Step-by-step explanation:

The answer is B because if you move two times to the right it gives you 0.09 like the eqution.

But scientific notation requires number without decimal, so the answer cannot be E because 0.9 is a decimal.

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5 0
4 years ago
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In the town of Maplewood a certain type of DVD player is sold at just two stores, 43% of the sales 13) are from store A and 57%
umka21 [38]

Answer:

Option A 0.312 is right

Step-by-step explanation:

Given that iN Maplewood a certain type of DVD player is sold at just two stores, 43% of the sales 13) are from store A and 57% of the sales are from store B. 2.4% of the DVD players sold at store A are defective while 4.0% of the DVD players sold at store B are defective.

Prob for any random item form store to be defective = Prob from A and defective +Prob from B and defective

=0.43(0.024)+0.57(0.04)\\=0.03312

Prob it came from A and defective = 0.0.43(0.024)=0.01032

If Kate receives one of these DVD players as a gift and finds that it is defective, what is the probability that it came from store A

=\frac{0.01032}{0.03312} \\=0.312

5 0
3 years ago
If we list all the natural numbers below 20 that are multiples of 7 or 11, we get 7, 11 and 14. The sum of these multiples is 32
velikii [3]
Number of multiples of 7 up to 1337: \left\lfloor\dfrac{1337}7\right\rfloor=191
Number of multiples of 11 up to 1337: \left\lfloor\dfrac{1337}{11}\right\rfloor=121
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This means there are 191+121-17=295 distinct multiples of 7 *or* 11 up to 1337.

The sum of these multiples is

\displaystyle\sum_{k=1}^{191}7k+\sum_{k=1}^{121}11k-\sum_{k=1}^{17}77k

which can be computed using the well-known formula,

\displaystyle\sum_{k=1}^nk=\dfrac{n(n+1)}2

So you have

\displaystyle\sum_{k=1}^{191}7k+\sum_{k=1}^{121}11k-\sum_{k=1}^{17}77k=7\dfrac{191\times192}2+11\dfrac{121\times122}2-77\dfrac{17\times18}2=197762
8 0
3 years ago
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aleksklad [387]

Answer:

3.39

Step-by-step explanation:

We will use SD formula to find our answer.

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N= Numbers of data-points.

We have been given that mean of our data set is 9. So we will find the square of each data point's distance to the mean.

Now let us substitute our given values in above formula.

Upon adding the square of distances we will get,  

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Therefore, the standard deviation for our given data set will be 3.39.

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Answer:

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Step-by-step explanation:

ポイントが欲しいだけなのかわからない

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