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2 years ago

Work out the circumference of a circle with diameter 1.8

Mathematics

2 answers:

dalvyx [7]2 years ago

5 0

5.66 (3 significant figures)

ZanzabumX [31]2 years ago

4 0

5.65 when rounded :)

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Rewrite 1/3 book - 5/6 hour as a unit rate.

insens350 [35]

Answer:

2/5

Step-by-step explanation:

The answer is 2/5 as a fraction or 0.40 as a decimal. To get the answer all you have to do is 1/3÷5/6

6 0

2 years ago

(5x+1)(5x-1) combine terms

Alinara [238K]

Answer:

25x^2 -1

Step-by-step explanation:

If you multiply parentheses:

(5x*5x) + (5x*-1) + (1*5x) + (1*-1)

25x^2 - 5x + 5x -1

25x^2 -1

A simpler way is to memorize this formula

(Square1 - square2)= (sqrt of square1- sqrt of square2)*(sqrt of square1 + sqrt of sqaure2)

5 0

3 years ago

HELP ASAPPPP PLEASE

Lerok [7]

Answer:

I don't know but i think the answer is:

3/8 and 1/2

Step-by-step explanation:

add both and the answer is there

3 0

2 years ago

What’s 4/5 times 7/8

kotykmax [81]

68 because I found out on internet

7 0

3 years ago

Read 2 more answers

PLEASE HELP!!

PSYCHO15rus [73]

Answer:

The bird is approximately 9 ft high up in the tree

Explanation:

The required diagram is shown in the attached image

Note that the tree, the cat and the ground form a right-angled triangle

Therefore, we can apply special trigonometric functions

These functions are as follows:

$sin(\alpha)=\frac{opposite}{hypotenuse} \\ \\ cos(\alpha)=\frac{adjacent}{hypotenuse} \\ \\tan(\alpha)=\frac{opposite}{adjacent}$

Now, taking a look at our diagram, we can note the following:

α = 25°

The opposite side is the required height (x)

The adjacent side is the distance between the cat and the tree = 20 ft

Therefore, we can use the tan function

This is done as follows:

$tan(\alpha)=\frac{opposite}{adjacent}\\ \\ tan(25)=\frac{x}{20}\\ \\x=20tan(25) = 9. 32 ft$ which is 9 ft approximated to the nearest ft

Hope this helps :)

5 0

3 years ago