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Schach [20]
3 years ago
10

The scores on a standardized test are normally distributed with the mean of 750 and standard deviation 70. Find the probability

that a score is between 750 and 890.
2.28%


47.7%


50%


13.6%
Mathematics
2 answers:
mafiozo [28]3 years ago
3 0
Hey the answer is C.47.7 
goodluck!
UNO [17]3 years ago
3 0
Konichiwa! Len here
The answer is C.47.7  im vary sorry if the answer is incorrect! hope this helped!
Have a nice day 
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A train leaves at 1314 and arrives at 1508. It travelled at an average speed of 105 km/h.
Paraphin [41]

Answer: The train traveled 199.5 km

Step-by-step explanation:

We know the relationship:

Distance = Time*Speed

We know that the speed of the train was 105km/h

And we know that it leaves at 13:14, and arrives at 15:08.

Then the total amount of time that the train was traveling is:

T = (15 hours and 8 mins) - (13 hours and 14 mins)

= (15 - 13) hours and (8 - 14) mins

=  2 hours and (-6) mins.

We know that one hour has 60 minutes, then this is equal to:

T = 1 hour and 54 minutes.

But because the speed is kilometers per hour, we need to rewrite the 54 minutes in hours.

This can be done as follows:

1 hour = 60 minutes.

Then: 54 minutes = (54/60) hours = 0.9 hours.

Then:

1 hour and 54 minutes = 1.9 hours.

Now we know the speed and the time, then the distance can be calculated as:

Distance = speed*time = 105km/h*(1.9 h) = 199.5 km

The train traveled 199.5 km

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3 years ago
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oksian1 [2.3K]

Answer:

360 degrees

Step-by-step explanation:

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20 POINTS! PLS HELP!
Arturiano [62]

First statement is correct. If Sasha reads her novel for 94 minutes, she meets the minimum reading requirement without reading any of the autobiography.

Given,

The rate of reading of a novel by Sasha = 0.8 pages per minute

The rate of reading of autobiography by Sasha = 0.5 pages per minute

The reading requirement of Sasha's English class = atleast 75 pages per week

The given equation: 0.8n + 0.5a ≥ 75

n is the number of minutes she reads the novel

a is the number of minutes she reads the autobiography

Now, let's check the statements:

Statement 1: If Sasha reads her novel for 94 minutes, she meets the minimum reading requirement without reading any of the autobiography.

That is,

0.8 × 94 + 0.5 × 0 ≥ 75

75.2 ≥ 75

This statement satisfies the equation.

Other 4 statement didn't satisfy the equation.

So, first statement is correct.

Learn more about rate of reading here:

brainly.com/question/4459849

#SPJ1

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1 year ago
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Aleksandr-060686 [28]

Answer: 45

Step-by-step explanation:


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alexgriva [62]

Answer:c=b^a

Step-by-step explanation:

Logb c=a

In exponential form

c=b^a

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