3 years ago

Is .21 (with only the one repeating) a rational number? please explain why! thanks!

Mathematics

1 answer:

Nostrana [21]3 years ago

8 0

21 is a rational number because it is an integer, which can be converted into a fraction.

<u>Step-by-step explanation:</u>

When a denominater and numerator are integers and gives a quotient then it is a rational number.

21/1, where 21 is denominator and 1 is numerator the quotient is 21. Therefore 21 is a rational number which can also be considered as a ratio.

You might be interested in

Please dont answer with anything bad :((( extremely need help

svetoff [14.1K]

Answer:

120°

Step-by-step explanation:

A line must add up to 180°.

The sum of angles in a triangle also adds up to 180°.

Step 1: Find measures interior angles.

3x = 180

x = 60°

Step 2: Find measures of exterior angels.

x + 60 = 180

x = 120°

5 0

3 years ago

Read 2 more answers

What is 45/90= to <br> i need help

Sati [7]

Answer:

1/2

Step-by-step explanation:

45/90 ÷ 45/45 = 1/2

5 0

2 years ago

Read 2 more answers

Write an equation of a line that passes through (1,1)and (6,6)

Ghella [55]

Answer:

y=x

Step-by-step explanation:

When y=x, then the line goes up 1 and right 1.

7 0

2 years ago

A chemist has a 30% and a 45% acid solution. What amount of each solution should be used to make 500ml of solution with 35% acid

9966 [12]

Not sure is this is right but if the chemist wants to make the solution 35% acidic then he can use all of the 30% acid and 5% of the 45% acid.

4 0

3 years ago

A girl is on the beach and the angle of elevation from her feet to the top of a lighthouse is 62' If the lighthouse is 30ft tall

soldi70 [24.7K]

Answer:

15.95 feets

Step-by-step explanation:

Given that:

Angle of elevation = 62°

Using trigonometric relation :

Tanθ = opposite / Adjacent

From the drawing attached :

Opposite = 30 feets

Distance between girl and lighthouse = d

Tan 62 = 30 / d

1.8807264 * d = 30

d = 30 / 1.8807264

d = 15.951283

d = 15.95 feets

3 0

3 years ago