What is the answer to this

Answers

Answer 1

Answer:

Step-by-step explanation:

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What is the solution set of {x | x < 2} ∪ {x | x ≥ 2}

Answers

The union of two sets is defined as all elements that are members of both sets.

The first set evaluuates to (...,...,...-2,-1,0,1) and the second eveluates to (2,3,4,5,...,...).

There are no elements that belong to both sets so the solution is the empty set. {∅}

Another way is to think about it in words: "What number(s) are less that 2 and also equal to to greater than 2?" Clearly there is no number that fits both of those.

A screwdriver cost $99, if you save $79 what is the percent of change?

Answers

To calculate the percentage of change We:
⇒work out the difference of the two costs
$99-$79=$20
⇒Divide the difference by the original
   $(20)/(99)$
⇒Multiply by 100 to get the answer as a percentage
   $(20)/(99)$ × 100
=20.2%
When we have a check:
$99 × 0.202 = 19.998 ≈ $20
  ║
The right answer

How do you evaluate cube roots and square roots( in simple words pls)

Answers

Answer:

To evaluate square roots, find the prime factorization. If all the exponents are even, then it is a square root! Just divide the exponents by 2, and multiply them together. To evaluate cube roots, find the prime factorization. If all the exponents are multiples of three, it is a cube root! Just divide the exponents by 3 and multiply them together.

Step-by-step explanation:

Final answer:

Evaluating cube roots and square roots involves finding the number that, when multiplied by itself (in the case of square roots) or multiplied by itself twice (in the case of cube roots), gives us the original number.

Explanation:

In simple words, evaluating cube roots and square roots involves finding the number that, when multiplied by itself (in the case of square roots) or multiplied by itself twice (in the case of cube roots), gives us the original number. For instance, 5 is the square root of 25, as 25 is equivalent to 5 multiplied by 5. Because 27 is equal to 3 times 3 times 3, this number's cube root is 3.

Learn more about Evaluating cube roots and square roots here:

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A room with poor air quality has a particle concentration of 80 units. A fan removes 50% of the remaining particles each hour. What is the particle concentration, in these same units, in the room after 2 hours?

Answers

Answer:

20 units

Step-by-step explanation:

Initial particle concentration = 80 units

Particles removed each hour = 50% of the remaining particles

To find:

Particle concentration after 2 hours = ?

Solution:

Particles removed in 1 hour = 50% of remaining particles

i.e. Particles removed in 1 hour = 50% of initial concentration

Particles removed in 1 hour = 50% of 80 = 40

Particles removed in next 1 hour = 50% of remaining particles

i.e. Particles removed in next 1 hour = 50% of concentration after 1 hour

Particles removed in next 1 hour = 50% of 40 = 20

Total particles concentration removed in 2 hours = 40 + 20 = 60 units

Therefore, particle concentration after 2 hours = Initial concentration - Total particle concentration removed in 2 hours

= 80 - 60 = 20 units

your fixed expenses are $1,235.78/month. You want to save 5 months' worth for an emergency fund over a year's time. How much must you save each month?

Answers

The correct answer is $514.91

You must save $514.90 a month

I am single also help me wha 1000 times 6 divided by 2 plus 6 divided by 8

Answers

Answer:

6/2+6/8

3/1+3/4

12/4+4/4

thatis1

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A car leaves a town traveling at 60 miles per hour. Two hours later, a second car leaves the town traveling the same route and overtakes the first car in 6 hours and 40 minutes. How fast was the second car traveling?