Answer:
I’m not sure what the question is since you are just giving me the information, but I’m gonna tell you this:
History >> 2 hrs
Chem >> 30 mins
Alg 2 >> 1 hr 30 mins
Hope this helps!
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Step-by-step explanation:
4 hours << total
Half her time on history>>4/2>>2 hrs on history
Leftover time>>4-2=2 hrs left
A fourth of leftover time on chem>>2hrs/4 = 30 mins on chem
What’s left? 2hrs - 30 mins= 1hr and 30 mins << leftover <<alg 2
The probability that x is between 420 and 460 is 0.25778
The sum of independent normally distributed random variables is normally distributed with mean equal to the sum of the individual means and variance equal to the sum of the individual variances.
so, the mean would be,
μ = 100 + 150 + 200
μ = 450
and standard deviation would be,
σ = 15+ 20 + 25
σ = 60
We need to find the probability that x is between 420 and 460.
P(420 < x < 460)
= P( 420 - μ < x - μ < 460 - μ)
= P((420 - μ)/σ < (x - μ)/σ < (460 - μ)/σ)
= P((420 - 450)/60 < Z < (460 - 450)/60)
= P (-1/2 < Z < 1/6)
= P(-0.5<x<0.167)
= 0.25778
Therefore, the probability is P(420 < x < 460) = 0.25778
Learn more about the probability here:
brainly.com/question/11234923
#SPJ4
619, 000 because if you round to the nearest ten thousandth, it would go from 619,000 to 620,000.
SEcond option is the right answer because of the Corresponding property... and I am 100% sure of it...
please mark my answer the brainliest! Thankyou! Hope I helped!
