1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
pogonyaev
3 years ago
10

There are 43 students in an elementary statistics class. On the basis of years of experience, the instructor knows that the time

needed to grade a randomly chosen first examination paper is a random variable with an expected value of 5 min and a standard deviation of 4 min. If grading times are independent and the instructor begins grading at 6:50 P.M. and grades continuously, what is the (approximate) probability that he is through grading before the 11:00 P.M. TV news begins? (Round your answers to four decimal places.)
Mathematics
1 answer:
gizmo_the_mogwai [7]3 years ago
8 0

Answer: it’s c

Step-by-step explanation:

You might be interested in
Armando found the volume of the figure below by using the steps shown.
Gnesinka [82]

Answer:

Armando use the wrong demensions for the triangular prism?

Step-by-step explanation:

The height is actually 8 inches.

5 0
3 years ago
Read 2 more answers
Find the lengths of the diagonals of this trapezoid.
Andrei [34K]
I think we need a trapazoid


4 0
4 years ago
If 2.5 mol of dust particles were laid end to end along the equator, how many times would they encircle the planet? The circumfe
Natalka [10]

Answer:

They encircle the planet 3.76\times 10^{11} times.

Step-by-step explanation:

Consider the provided information.

We have 2.5 mole of dust particles and the Avogadro's number is 6.022\times 10^{23}

Thus, the number of dust particles is:

2.5\times 6.022\times 10^{23}=15.055\times 10^{23}

Diameter of a dust particles is 10μm and the circumference of earth is 40,076 km.

Convert the measurement in meters.

Diameter: 10\mu m\times \frac{10^{-6}m}{\mu m} =10^{-5}m

If we line up the particles the distance they could cover is:

15.055\times 10^{23}\times 10^{-5}=15.055\times 10^{18}=1.5055\times 10^{19}

Circumference in meters:

40,076km\times \frac{1000m}{1km}=40,076,000 m

Therefore,

\frac{1.5055\times 10^{19}}{40,076,000} = 3.76\times 10^{11}

Hence, they encircle the planet 3.76\times 10^{11} times.

8 0
3 years ago
Please help will give brainliest
butalik [34]

Answer:

360 m is the answer........

6 0
3 years ago
Read 2 more answers
What is the variable in the expression below?<br><br><br> 9.X
Ludmilka [50]

Answer:

The variable in that expression is x

5 0
3 years ago
Read 2 more answers
Other questions:
  • HELP NEEDED ASAP!! PLEASE!!!
    15·1 answer
  • there are 27 small cubes arranged in a 3 by 3 by 3 cube. The top and sides of the cube are painted red. How many of the 27 small
    5·1 answer
  • A bee flies 15 miles per hour. Use the formula for distance, rate, and time to answer questions A-C. A. Write the bee's distance
    7·1 answer
  • Simplify 8 over the quantity of 2 plus 2i
    10·2 answers
  • Three integers x, y and z satisfy 34x+5ly=6z. If y and z are primes, find the
    14·1 answer
  • If a number cube is rolled once, what is the probability of an even number facing upward?
    8·1 answer
  • Determine the slope and y-intercept of a line through the points (-2,6) and (4,-3)
    7·1 answer
  • Arthur earned $22.50 last night delivering lunches for his family's restaurant. He puts 30% of his earnings into his savings acc
    14·1 answer
  • 6 + 5y - 4y + 10 + 3x - X
    5·2 answers
  • What is the range of the relation y = 3x2 + 4x if the domain is the set (-1,0, 1)?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!