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kirza4 [7]
2 years ago
13

s in the previous exercise, suppose the lengths of phone calls to the receptionist of a small company are i.i.d. with a mean of

5 minutes and an SD of 8 minutes. Let ????1,????2,…,???????? be the lengths of ???? calls in minutes, and let ????????=1????∑????????=1???????? be the sample average length. In each of the following parts, either find the chance exactly, or approximate it, or bound it. Do the best you can with the information given. a) P(|????16−5|<4)
Mathematics
2 answers:
Anna [14]2 years ago
8 0

Answer:

jhviiu

Step-by-step explanation:

Alekssandra [29.7K]2 years ago
3 0

Answer: i do not understand what you are trying to ask

Step-by-step explanation:

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The equation r(t)= (2t)i + (2t-16t^2)j is the position of a particle in space at time t. Find the angle between the velocity and
ankoles [38]

Answer:

The answer is 135 degrees.

Step-by-step explanation:

As we are given the position. If we take the <u>derivative</u>, we get the velocity vector. If we take the <u>derivative</u> again, we find the acceleration vector of the particle.

r(t)=(2t)i+(2t-16t^{2})j

V(t)=2i+(2-32t)j

a(t)=-32j

At time t=0;

v(t)=2i+2j

a(t)=-32j

As i attach in the picture the angle between the velocity and acceleration vector is (45+90)=135 degrees

4 0
2 years ago
Elysse paid for her sandwich and drink with a $10 bill and received $0.63 in change. The sandwich cost $7.75 and sales tax was $
EleoNora [17]

Given

Elysse paid for her sandwich and drink with a $10 bill and received $0.63 in change.

The sandwich cost $7.75 and sales tax was $0.47.

Find out the  cost of her drink

To proof

Let the cost of her drink be x.

As given in the question

Elysse paid for her sandwich and drink with a $10 bill and received $0.63 in change.

Elysse paid for her sandwich and drink = 10 - 0.63              

                                                                 =  $ 9.37

sandwich cost $7.75 and sales tax was $0.47

Than the equation becomes

x = 9.37 - (7.75 + 0.47)

x = 9.37 - 8.22

x = $ 1.15

The cost of the drink is $ 1.15.

Hence proved      

4 0
2 years ago
Read 2 more answers
Phoebe surveyed teens and adults to find the average number of hours of sleep they get during the week. Her results are shown be
Thepotemich [5.8K]

Answer:

its the second option

Step-by-step explanation:

i did the test and got 100

8 0
2 years ago
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Marisol is trying to decide which job to take. She is offered three jobs. The store manager has a salary of $32,500. The
Anon25 [30]

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I think it is the department manager

8 0
2 years ago
Michael earns $21 per hour and works 40 hours per week. How many overtime hours would he have to worky in a week for his time-an
Alex73 [517]

Answer:

27 hours

Step-by-step explanation:

The regular hours are paid normally, 21/hr hence working for 40 hours, Michael earns 40*21=$840

To work x hours paid overtime as 1.5 of the normal rate, the rate would be $21*1.5=$31.5/hr

X hours multiplied by rate of $31.5/hr should be at least equal to $840

31.5x>=840

X>=840/31.5>=26.6667 hours and when rounded off

X is 27 hours

6 0
2 years ago
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