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yawa3891 [41]
3 years ago
7

1/9x^2-4 Decomposition

Mathematics
1 answer:
irina [24]3 years ago
8 0
I got 0.01298?
(probably wrong)
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A cyclist rides 225 m each minute.About how long does it take to ride 15km? Show all fo your work
Elan Coil [88]
Speed = 225 metres per minute

Distance = 15 km = 15,000 metres

---------------------------------------------------

s=d/t

ts=d

Therefore: t=d/s

--------------------------------------------------

Time = Distance / Speed

Time = (15,000 metres) / (225 metres per minute)

--------------------------------------------------

Let's work it out:

Time=\frac { 15,000\quad metres }{ \frac { 225\quad metres }{ 1\quad minute\left( s \right)  }  } \\ \\ =\frac { 15,000\quad metres }{ 1 } \cdot \frac { 1\quad minute\left( s \right)  }{ 225\quad metres } \\ \\ =\frac { 15,000 }{ 225 } minutes

\\ \\ =\frac { 200 }{ 3 } minutes\\ \\ \frac { 200 }{ 3 } minutes\quad =\quad 66\quad minutes,\quad 40\quad seconds
6 0
4 years ago
I really need some help with this
BlackZzzverrR [31]

Answer:

It's B

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Which sentence is punctuated correctly? The students line up in the afternoon to wait for the buses to arrive. The students, lin
Irina18 [472]

Answer: the answer is A

Step-by-step explanation: the commas are pausing the sentences for no reason the sentence is fine by itself

8 0
4 years ago
I have no idea hot to plot parabolas.
Sedbober [7]

Answer:

what grade is that ?

Step-by-step explanation:

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6 0
3 years ago
The time needed to complete a final examination in a particular college course is normally distributed with a mean of 79 minutes
bagirrra123 [75]

Answer: a) 0.0088

b) 0.2997

c)  5

Step-by-step explanation:

Given : Mean : \mu = 79 minutes

Standard deviation : \sigma = 8 minutes

The formula for z-score :

z=\dfrac{x-\mu}{\sigma}

a) For x = 60 minutes

z=\dfrac{60-79}{8}=-2.375

The p-value =P(z\leq-2.375)=0.0087745\approx0.0088

b) For x = 75 minutes

z=\dfrac{75-79}{8}=-0.5

The p-value =P(60

=P(-0.5)-P(-2.375)=0.3085-0.0088=0.2997

c) For x = 90 minutes

z=\dfrac{90-79}{8}=1.375

The p-value =P(z>1.375)=1-P(z

=1-0.9154342=0.0845658

If the number of students in the class = 60 .

Then , the number of students will be unable to complete the exam in the allotted time =0.0845658\times60=5.073948\approx5

7 0
3 years ago
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