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liq [111]
3 years ago
14

Dr adams just started an experiment he will collect data for 7 days how many hours is this

Mathematics
2 answers:
Pavel [41]3 years ago
4 0
7 x 24 = 168 hours :)
wolverine [178]3 years ago
3 0

Hi There!

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

We Know:

He worked 7 days on his experiment.

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

Find:

How many hours are in 7 days.

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

Solution:

1 day = 24 hours

24 x 7 = 168 hours

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

Answer:

He spent 168 hours on his experiment.

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

Hope This Helps :)

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Josiah kept track of how many songs of each genre were played in an hour from his MP3 player. The counts are displayed in the ta
german

Based on the number of songs in each genre that Josiah listened to, the statements about his solution that are true are:

  • He should have found the average of the number of rock songs by averaging 4 and 6 to get 5.
  • He did not multiply the numerator and denominator by the correct number to equal 1,500.
  • He should have multiplied the numerator and denominator by 75, not 30, because 20 times 75 = 1,500.

<h3>What did Josiah do wrong?</h3>

To find the average of the number of rock songs, he should have taken the average of rock songs he listened to which were 4 and 6:

= (4 + 6) / 2

= 5

Because he has a total of 1,500 songs on his player, he should have multiplied both the numerator and denominator by a number that would lead to 1,500 which is 75 and not 30.

Find out more on averages at brainly.com/question/13832161.

#SPJ1

7 0
1 year ago
Evaluate 66 - 20 - 32 1/4
BigorU [14]

Answer:

13.75

Step-by-step explanation:

66-20- 32 1/4

66-20- 32.25

46-32.25

13.75

8 0
3 years ago
Can you someone help me
lord [1]

(6,8) is the answer also this could be the answer too (6,2)

hope this helps

4 0
3 years ago
PLEASE HELP ME WITH THIS
Alik [6]

Answer:

  • x + y ≤ 600
  • 5x +7y ≥ 3500
  • it is possible

Step-by-step explanation:

a) We can write two inequalities, one for the number of tickets, and one for the necessary revenue.

  x + y ≤ 600 . . . . . . . limit imposed by available seating

  5x +7y ≥ 3500 . . . . required revenue to meet expenses

__

b) For x = 330, the first inequality puts one limit on y:

  330 +y ≤ 600

  y ≤ 270

And the second inequality puts another limit on y:

  5(330) +7y ≥ 3500

  7y ≥ 1850 . . . . subtract 1650

  y ≥ 264.3 . . . . divide by 7

The number of tickets that must be sold to meet expenses is 265, which is less than the number that can be sold, 270. It is possible to meet expenses.

4 0
3 years ago
Suppose that the probability that a person will develop hypertension over a life time is 60%. Of 13 graduating students from the
Savatey [412]

Answer:

The mean number of the students who develop hypertension over a life time is 7.8.

Step-by-step explanation:

For each person, there are only two possible outcomes, either they will develop hypertension, or they will not. The probability of a person developing hypertension is independent of any other person, which means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

Probability of exactly x successes on n repeated trials, with p probability.

The expected value of the binomial distribution is:

E(X) = np

Suppose that the probability that a person will develop hypertension over a life time is 60%.

This means that p = 0.6

13 graduating students from the same college are selected at random.

This means that n = 13

Find the mean number of the students who develop hypertension over a life time

E(X) = np = 13*0.6 = 7.8

The mean number of the students who develop hypertension over a life time is 7.8.

5 0
3 years ago
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