QUESTION 11 A recent study has shown the amount of time people are using their electronic devices (i.e. using a com- puter/phone/tv) has dramatically increased since March. This study stated the random variable r= the amount of time (in hours) a randomly selected American is using their electronic devices per day, is approximately normal with mean µ„ = 6.5 and o, = 1.25. Compute the following: a.) What is the probability a randomly selected American uses electronic devices less than 6 hours a day, i.e. P(r < 6)? Round to 4 decimal places. b.) What is the probability a randomly selected American uses electronic devices greater than 7 hours a day,

Q: 3. √11

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Q: a) : ?

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Q: 1 -3 -27 A =| -2 7 -2 5. 54

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Percentage

A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.

Algebraic Expressions

In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.

Numbers

Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.

Subtraction

Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.

Addition

Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.