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jok3333 [9.3K]
4 years ago
5

A swimming pool is open for 7 1/2 hours during a day. The pool keeps one lifeguard on duty at a time, and each lifeguard's shift

is 1 1/2 hours long.
Mathematics
2 answers:
Aleks04 [339]4 years ago
8 0
There are 5 shifts because 7 1/2 divided by 1 1/2 equals 5.
HACTEHA [7]4 years ago
7 0
You will need 5 lifeguards a day
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Suppose that the probability of landing an interview after applying for a professional position is 0.13. A job seeker applies fo
andrew11 [14]

Answer:

The expected number of interviews is 3.25.

Step-by-step explanation:

For each person applying for a profissional position, there are only two possible outcomes. Either they land an interview, or they do not. The probability of a person landing an interview is independent of any other person. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

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

The expected value of the binomial distribution is:

E(X) = np

In this problem, we have that:

n = 25, p = 0.13

So

E(X) = np = 25*0.13 = 3.25

The expected number of interviews is 3.25.

8 0
4 years ago
How do you solve -4+p +2
klasskru [66]
You just combine like terms.....

- 4 + p + 2

- 4 + 2 + p

The answer is p - 2
3 0
4 years ago
2/5 + 1/10 simpllest form help oddeyseware please help if you took the test
drek231 [11]

Answer:

hight so im not sure about the test you are talking about but its 1/2 or 0.5 both are right..

Step-by-step explanation:

Its basic math..

4 0
3 years ago
Read 2 more answers
What sentence represents the number of test questions in the problem below? A test is worth 80 points. Multiple-choice questions
almond37 [142]
The first thing we must do for this case is to define variables.
 We have then:
 x = Multiple-choice questions
 y = short-answer questions
 We write the following system of equations:
 2x + 4y = 80
 x + y = 25
 Solving the system of equations we have:
 x = 10
 y = 15
 Answer:
 
there are 10 multiple-choice questions
5 0
4 years ago
The Red Bus Company charges $150 plus 72 per hour to rent a bus the blue bus company charges $240 plus 54 per hour for what numb
IgorLugansk [536]
Let's start off by writing equations for each
Let's say the Red Bus Company is Company Red, and the Blue Bus Company is Company Blue to keep it short.
Company Red = 150 + 72(h) whereas h stands for how many hours
Company Blue = 240 + 54(h) whereas h stands for how many hours
Now, we plug in some numbers starting from 1 to see when the companies will match, however, I'll only do 2 examples to keep this short.
Let's start off at 5 hours (you can start off at any, but I prefer to be in the middle to see whether which company surpasses the other in cost and we can build off from there
Company Red:
150 + 72(5)
72 * 5 = 360
150 + 360 = 510
Company Blue:
240 + 54(5)
53 * 5 = 270
240 + 270 = 510
Wow, actually it looks like they charge will be the same after 5 hours. No need to do a second equation since we got it on our first try.

8 0
4 years ago
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