ihatedevin12

03.02.2020 • 

Mathematics

Alice bought a new cell phone. the cell phone company she bought the phone from charges $50 per month for cell phone service, $200 for the new phone, and a fee of $175 if the contract is terminated before 2 years have expired. which of the following linear equations models alice's total cost in dollars, y , as a function of the number of months after she purchased the phone, x ,if she terminates her contract before 2 years? a- y=50x+200 b- y=50x+375 c-y=175x+50 d-y=375x+50

Ответ:

trying2passs

17.01.2022

Mathematics

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To me answer choice B looks to be correct

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Ответ:

alex24gonzales

16.11.2022

Mathematics

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Step-by-step explanation:

Given ;

Sample size, n = 15probability of a first pitch strike, p = 0.56Probability of not first pitch strike ; q = 1 - p = 1 - 0.56 = 0.44Applying binomial distribution ; P(X = r) = nCr x P^r x (q)^n-r

a) P ( X = 13 ) = C(15,13) x 0.56^13 x (1-0.56)^2 = 0.0108

b) Mean = np = 15 x 0.56= 8.400

Standard deviation = √(np(1-p)) = √(15 x 0.56 x (1-0.56)) = 1.9225

c) P(X>10) = 1 - P(X≤10) = 1 - 0.8633 = 0.1367

d) P(X≥12) = P(X=12) + P(X=13) + P(X=14) + P(X=15) = 0.0498

e) P(Y=3) = C(3,1) x 0.56^1 x (1-0.56)^2 x 0.56 = 0.1821

f) P(Y=2) = C(2,1) 0.56^1 x (1-0.56)^1 x 0.56 = 0.2760

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