How do you know if a number is smaller or bigger

1 answer:

4 0

Use a number line and plot it with zero in the middle and the positive numbers on the right and the negative numbers on the left
the farther to the right a number is, the bigger it is
the farther to the left a number is, the smaller it is

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Consider a multiple choice exam with 10 questions, and with 4 possible answers to each question (labeled A, B, C, and D). 1a. Wh

mrs_skeptik [129]

Answer:

(1a) 9.54e-07 (1b) 0.9437 (2) $10^8$

Step-by-step explanation:

We have n = 10 questions. For each question in the multiple choice exam, we can choose the correct answer with probability p = 0.25 or an incorrect answer with probability q = 0.75 (just by guessing). Besides is reasonable to believe that questions are independent. Let X be the random variable that represents the number of correct answers (just by guessing) observed during the n = 10 questions, so, X have a binomial distribution.

(a) The probability of getting a perfect score just by guessing is

$P(X = 10) = 10C10(0.25)^{10}(0.75)^{10-10} = 9.54e-07$

(b) The probability of getting at least one question correct, just by guessing

$P(X\geq1) = \sum_{x=1}^{x=10}10Cx(0.25)^{x}(0.75)^{(10-x)} = 0.9437$

2. Each RUID is 9-digits long, there are 10 digits, each of the nine positions for a digit of the RUID has 10 posibilities except the 4th and 5th positions which must be both 0. For the multiplication rule there can be $(10)^3(1)(1)(10)^5 = 10^8$ different RUIDS.

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3 years ago

Beth finished a race in 4.59 minutes. Ana finished the race in 0.7 minutes less than Beth. Fran finished the race in 1.05 minute

Firlakuza [10]

First you would wanna subtract 0.7 from 4.59 so you would get 4.59-0.7= 4.52. then you would wanna do 4.52-1.05= 3.47 for Fran

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3 years ago

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Anyone have 5.3.4 Practice: Modeling: Finding Parallelograms answer key?

Trava [24]

Answer:hahah no but depending on what you are using u can go to the search bar take a screenshot shot of what you want to answer and take that screenshot and add it to the bar there should be like a camera icon or something it depends on what ur using tho so id k maybe not I tried but I gtg c ya

Step-by-step explanation:

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3 years ago

Can anyone explain how to differentiate this ? (2x^2+3)sin5x

Ksju [112]

Hello,

(u*v)'=u'v+uv'
u=2x²+3 ==> u'=4x
v=sin 5x ==>v'=cos 5x *5

((2x²+3 sin (5x))'=4x* sin (5x) +(2x²+3)*cos (5x) * 5

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3 years ago

Help me please I’ll give brainlest

kodGreya [7K]

The answer is A. Because if you subtract 3 from 23 it will be 20 and 20 divided by 2 is 10

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3 years ago

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