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Zolol [24]
3 years ago
9

Which of the following is a rational number? (4 points)

Mathematics
2 answers:
aliina [53]3 years ago
8 0

Answer:        square root 100

Hope I helped

aniked [119]3 years ago
7 0

Answer:

An Imperfect Square (Meaning a whose square root is not a whole number)  is always an Irrational Number.

Out of all of these numbers, only 100 has a sqrt which is a whole number, which means it is a rational number.

The others are not Perfect Squares, thus they are Irrational

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The diagram shows the entrance to a tunnel.
gladu [14]

Step-by-step explanation:

it filled up half the circle (up to the center point) - if we had a full circle. but a little bit is cut off (below AB).

what we see is that the shaded area is the sum of the area of the triangle AOB and 2 equally sized circle segment areas left and right of AOB.

since we are dealing with a half-circle, we have 180° in total. 120° are taken by AOB, so, that leaves us with 180-120 = 60° for both circle segments (so, one has an angle of 30°).

and 2×30° = 1×60°, so we can calculate the area of one 60° segment instead of two 30° segments.

AOB is an isoceles triangle (the legs are equally long, and therefore also the 2 side angles are equal).

the area of this triangle AOB is

1/2 × a × b × sin(C) = 1/2 × 3 × 3 × sin(120) =

= 3.897114317... m²

a circle segment area of 60° is 60/360 = 1/6 of the full circle area (as a full circle = 360°).

so, it's area is

pi×r² × 1/6 = pi×3²/6 = pi×3/2 = 4.71238898... m²

so, the total area of the shaded area is

3.897114317... m² + 4.71238898... m² =

= 8.609503297... m²

5 0
2 years ago
Which is greater 1/4 or 0.4
Likurg_2 [28]

Answer:

0.4

Step-by-step explanation:

1/4 = 0.25

3 0
3 years ago
Read 2 more answers
Quigley paid $80 on his phone bill. This is 40% of the bill. How much is the bill?
pickupchik [31]

Answer:

32%

Step-by-step explanation:

6 0
3 years ago
When the population mean and standard deviation are known, what distribution is used for the analysis of the sample?.
Kitty [74]

When the population mean and standard deviation are known, you use the standard normal distribution

<h3>How to determine the distribution?</h3>

There are several probability distributions; these include

  • Normal distribution
  • Poisson distribution
  • Chi square distribution
  • Binomial distribution
  • Etc

Of all these distribution, only the standard normal distribution can be used when the population mean and standard deviation are known,

Note that it is also referred to as the z-distribution

Read more about probability distributions at:

brainly.com/question/24756209

7 0
1 year ago
What is the value of p so that the expression 4(5 + n) is equivalent to 4(n + p) ?
Gennadij [26K]

Answer:

5

Step-by-step explanation:

4(5+n)=4(n+p)

20+4n=4n+4p

4p=20

p=20/4

p=5

8 0
2 years ago
Read 2 more answers
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