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natulia [17]
3 years ago
8

What is the best description of parallel lines?

Mathematics
1 answer:
hichkok12 [17]3 years ago
3 0
1,3,5,6 are correct answers
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Ashley took 3 minutes to run a distance of 540 meters from point X to point y. Grace took 2 minutes to run a distance of 480 met
vampirchik [111]
540/3=180

Ashley ran at 180 metres per minute.

480/2= 240

Grace ran at 240 metres per minute.
5 0
3 years ago
5,300 milliliters to liters
kondaur [170]

Answer:

5.3L

Step-by-step explanation:

5,300 milliliters to liters

move decimal three to the left

5,300.00 ml is 5.3 L

3 0
2 years ago
Read 2 more answers
The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 257.62 and a standard deviation of
Effectus [21]

Answer:

(a) Approximately 68 % of women in this group have platelet counts within 1 standard deviation of the mean, or between 195.5 and 319.7.

(b) Approximately 99.7% of women in this group have platelet counts between 71.3 and 443.9.

Step-by-step explanation:

We are given that the blood platelet counts of a group of women have a bell-shaped distribution with a mean of 257.62 and a standard deviation of 62.1

Let X = <u><em>the blood platelet counts of a group of women</em></u>

So, X ~ Normal(\mu=257.62, \sigma^{2} =62.1^{2})

Now, the empirical rule states that;

  • 68% of the data values lie within the 1 standard deviation of the mean.
  • 95% of the data values lie within the 2 standard deviations of the mean.
  • 99.7% of the data values lie within the 3 standard deviations of the mean.

(a) The approximate percentage of women with platelet counts within 1 standard deviation of the mean, or between 195.5 and 319.7 is 68% according to the empirical rule.

(b) The approximate percentage of women with platelet counts between 71.3 and 443.9 is given by;

       z-score of 443.9 =  \frac{X-\mu}{\sigma}

                                   =  \frac{443.9-257.62}{62.1}  = 3

       z-score of 71.3 =  \frac{X-\mu}{\sigma}

                                =  \frac{71.3-257.62}{62.1}  = -3

So, approximately 99.7% of women in this group have platelet counts between 71.3 and 443.9.

5 0
3 years ago
What is the probability of getting two heads and two tails in four flips of a fair coin?
jekas [21]
Number of  combinations possible = 4! / 2! 2! =  6

Each of these has probability 1/2*1/2*1/2*1/2  = 1/16

Required probability  = 6  * 1/16  = 3/8
3 0
3 years ago
13. ALGEBRA Arianna North borrowed $12,500 to purchase a new cello and
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8.1% is the exact interest rate

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