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2 years ago

A CD is shaped like a circle with a diameter of 12 cm. To the nearest centimeter, what is the circumference of the CD?

Mathematics

2 answers:

emmainna [20.7K]2 years ago

4 0

Answer:

38 cm

Step-by-step explanation:

Circumference is given by

C = pi *d

C = pi *12

C = 3.14 * 12

C=37.68

Rounding to the nearest cm

C = 38

natima [27]2 years ago

4 0

Answer:

38 cm

Step-by-step explanation:

The circumference is found by pi*diameter.

pi*12=37.6991118431, rounded up is 38

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a right triangle has a base that measures 39 inches and a height that measures 80 inches what is the length of the hypotense

mafiozo [28]

A right triangle has three sides: the two sides that share a vertex are known as the legs, and the other side is known as the hypotenuse. The legs are known as a and b, while the hypotenuse is c.
The Pythagorean Theorem states the a^2 + b^2 = c^2. If we plug the numbers into this equation, we will find the length of the hypotenuse.
39^2 + 80^2 = c^2
1521 + 6400 = c^2
7921 = c^2
We have c squared now, but we want to know how much c is equal to. The square root of c^2 will be our answer.
89 = c
The length of the hypotenuse of a right triangle with legs that measure 39 and 80 inches is 89 inches.

4 0

2 years ago

Write an equation of the line that is perpendicular to y=-3x+1 and passes through point (5,3).

Snezhnost [94]

Answer: There are two formulas that we will use the first one is the y=m x+b and the second one is finding the perpendicular line.

Step-by-step explanation:

the first one is

y=m x+b

y= 3 x -12

the second one is

first find the negative reciprocal of the slope of the original line and use the point slope formula y- y,= m(x - x1) to find the line perpendicular to

Y= 3 x 1

X= 5

8 0

2 years ago

Which of the following points IS a solution to the system: y > - 3x + 4 / y > 2x / - y < 7 Selected answer is not corre

Lady bird [3.3K]

Answer:

Solution : Third Option

Step-by-step explanation:

The first step here is to make all the signs uniform. As you can see the third inequality has a less than sign, which we can change to a greater than sign by dividing negative one on either side, making the inequality y > - 7.

$\begin{bmatrix}y>-3x+4\\ y>2x\\ y>-7\end{bmatrix}$

Now take a look at the third option. Of course the y - coordinate, 3, is greater than - 7, so it meets the third requirement ( y > - 7 ). At the same time 3 > 1( 2 ) > 2, and hence it meets the second requirement as well. 3 > - 3( 1 ) + 4 > - 3 + 4 > 1, meeting the first requirement.

Therefore, the third option is a solution to the system.

6 0

2 years ago

Solve for h.<br><br> –0.62 + 8.35 + 3.9h = –6.55 + 1.1h

stepan [7]

Answer:

$- 0.62 + 8.35 + 3.9h = - 6.55 + 1.1h \\ \\ 3.9h - 1.1h = - 6.55 + 0.62 - 8.35 \\ \\ 2.8h = - 14.28 \\ \\ h = \frac{ - 14.28}{2.8} \\ \\ h = \frac{ - 142.8}{28} \\ \\ h = - 5.1$

I hope I helped you^_^

8 0

2 years ago

Please help me with this problem.

Harrizon [31]

Answer:

Step-by-step explanation:

$45^{2} +b^{2} =75^{2} \\2025+b^{2}=5625\\b^{2} =3600\\b=60$

7 0

2 years ago

Read 2 more answers