4 years ago

If you roll a number cube 54 times, about how many times do you expect to roll a number less than 5?

Mathematics

1 answer:

Studentka2010 [4]4 years ago

7 0

Answer:

18 times

Step-by-step explanation:

if you roll a number cube 54 times about how many times do you expect to roll a number less than 5? So you don't want a 5 or a 6. Then in your 54 tries, if the 5 or 6 can come up 18 times, what are you left with for the other possibility?

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3 years ago

Please explain how - calc ab - see attached photo

baherus [9]

Answer:

Step-by-step explanation:

Set up to different integrals that match the endpoints

so in our case it would look like

$\int\limits^0_{-2} {x} \, dx +\int\limits^1_0 {x+1} \, dx$

now it's just a matter of computing it

$\int\limits^0_{-2} {x} \, dx =x^2\\0^2-(-2)^2=4\\\int\limits^1_0 {x+1} \, dx =\frac{x^2}{2}+x\\\frac{1}{2}+1-0=\frac{3}{2}\\\frac{3}{2}+4=\frac{11}{2}$