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2 years ago

If Breanna walked 3 1/4 kilometers each day for 12 days, what was the total distance that she walked?

Mathematics

2 answers:

Dmitry_Shevchenko [17]2 years ago

8 0

Answer:

39km

Step-by-step explanation:

first we turn 1/4 into a decimal by dividing 1÷4=0.25

then she walked the same speed for 12 days so we use mulitiplication.

3.25x12=39km

romanna [79]2 years ago

7 0

Answer:

C 39 km

Step-by-step explanation:

Just do 3.25 (3 and 1/4) times 12 and get 39.

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2 years ago

g Bonus: Assume that among the general pediatric population, 7 children out of every 1000 have DIPG (Diffuse Intrinsic Pontine G

patriot [66]

Answer:

0.9586

Step-by-step explanation:

From the information given:

7 children out of every 1000 children suffer from DIPG

A screening test designed contains 98% sensitivity & 84% specificity.

Now, from above:

The probability that the children have DIPG is:

$\mathbf{P(positive) = P(positive \ | \ DIPG) \times P(DIPG) + P(positive \ | \ not \DIPG)\times P(not \ DIPG)}$ $= 0.98\imes( \dfrac{7}{1000}) + (1-0.84) \times (1 - \dfrac{7}{1000})$

= (0.98 × 0.007) + 0.16( 1 - 0.007)

= 0.16574

So, the probability of not having DIPG now is:

$P(not \ DIPG \ | \ positive) = \dfrac{ P(positive \ | \ not DIPG)\timesP(not \ DIPG)} { P(positive)}$

$=\dfrac{ (1-0.84)\times (1 - \dfrac{7}{1000}) }{ 0.16574}$

$=\dfrac{ 0.16 ( 1 - 0.007) }{0.16574}$

= 0.9586

8 0

2 years ago

Adjacent and congruent to

Viefleur [7K]

To what ???? Was there supposed to be a picture?

7 0

3 years ago

Which of these graphs represents an even function?

lidiya [134]

D because I’ve done this test before

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2 years ago

teacher has 27 students in her class she asked the students to form as many groups of 4 as possible how many students are not be

stepan [7]

If there are 27 students in the class and they have to form as many groups of 4 as possible, you can calculate this using the following step:

27 / 4 = 6.75 = 6 3/4

Result: 27 students can form 6 groups of 4 students and 3 students have to form their own group.

4 0

2 years ago