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statuscvo [17]
3 years ago
9

The graph below illustrates the time students took to complete a test when all students were allowed to finish. The distribution

has mean 65 minutes and standard deviation 10 minutes.Using the Empirical Rule, if the instructor sets a time limit of 75 minutes, at least _____% of students should be able to finish because this is one standard deviation above the mean.
Mathematics
1 answer:
Greeley [361]3 years ago
7 0
The answer for this question is 15%
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ANSWER ASAP PLZZ three times William's age, w, is less than his cousin Sandra's age, 15. On the number line below, select from t
Eva8 [605]

Answer:

w = 13, 11, 12

Step-by-step explanation:

3 (15 - w)

3 (15 - 13)

3 (2)

w = 6

___

3 (15 - x)

3 (15 - 11)

3 (4)

w = 12

___

3 (15 - x)

3 (15 - 12)

3 (3)

w = 9

(hope this helps!)

8 0
3 years ago
A fair coin is flipped seven times. what is the probability of the coin landing tails up at least two times?
GaryK [48]

The required probability of the coin landing tails up at least two times is 15/16.

Given that,
A fair coin is flipped seven times. what is the probability of the coin landing tails up at least two times is to be determined.

<h3>What is probability?</h3>

Probability can be defined as the ratio of favorable outcomes to the total number of events.

Here,
In the given question,
let's approach inverse operation,
The probability of all tails  = 1 / 2^7 because there is only one way to flip these coins and get no heads.
The probability of getting 1 head = 7 /2^7
Adding both the probability = 8 / 2^7
Probability of the coin landing tails up at least two times = 1 - 8/2^7
                                                                                     = 1 - 8 / 128
                                                                                     = 120 / 128
                                                                                     = 15 / 16

Thus, the required probability of the coin landing tails up at least two times is 15/16.

Learn more about probability here:

brainly.com/question/14290572

#SPJ2

7 0
1 year ago
The fastest race horse ran 1/4 mile in 1/3 of a minute. What was the horse's running speed?
bagirrra123 [75]

Answer:

3/4 miles per minute

Step-by-step explanation:

To get speed in miles per minute, just divide distance/time

1/4 mile / 1/3 minute = 3/4 miles per minute

If you want miles per hour, you'll have to convert minutes to hours.

3/4 miles/minute * 60 minutes/hour = 45 miles/hour

6 0
3 years ago
Hey!! if you can please help me with 4 and 5 ☺️☺️
drek231 [11]

Answer:

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4 0
3 years ago
Sarah opens a savings account that has a 2.75% annual interest rate, compounded monthly. She deposits $500 into the account. How
qaws [65]

Answer: $754.94

Step-by-step explanation:

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