4 meters, since 100 centimeters equal 1 meter you'd divide 400 by 4 to get your answer of 4 meters. It's just basic math. Don't get so scared that you'll get your answer wrong and just focus.
Considering the probabilities of getting each question right, his expected score for the test is 90.8.
<h3>How to find Joe's expected score?</h3>
Joe's expected score is given by the sum of the expected score for each question.
We have that:
- He is sure of 12 answers, hence for each he expects 6 points.
- He randomly guesses on 9 problems, hence he is expected to have a 1/5 probability of earning 6 on them.
- For the other 4 problems, he has a 1/3 probability of earning 6 on them, as he will guess from 3 options as he eliminated 2.
Hence his expected score is given by:
E(X) = 12 x 6 + 9 x 1/5 x 6 + 4 x 1/3 x 6 = 90.8.
More can be learned about the expected score of a distribution at brainly.com/question/13617733
#SPJ1
Answer:
<h2>2.14367............. is a irrational number.</h2>
2.
24^2 -7^2
=576 + 49
=625
square root 625 = 25
answer is A. 25 ft (first choice)
3.
13^2 - 5^2
= 169-25
=144
square root 144 = 12
answer is d. 12 yd (last choice)
---------------------------------------------------
make sure you refresh your page!!!!!
