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3 years ago

The diameter of circular CD is 120 millimeters. Which of the following is closest to the circumference of the CD in millimeters?

Mathematics

1 answer:

garik1379 [7]3 years ago

4 0

Answer:

Circumference=C=377 mm

Step-by-step explanation:

$C=\pi d$

d=120 mm

C=3.14*120=377 mm

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Which expressions are equivalent to 4^3 〖 x 4〗^(-5)? Choose all answers that are correct. 4^(-2) 1/16 4^(-15) 0.0625 〖16〗^(-1) 1

Alexus [3.1K]

Answer:

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Step-by-step explanation:

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3 years ago

Simplify (4xy-2x)+(2x^2+8x)

devlian [24]

Answer: 4xy+6x+2x^2

Step-by-step explanation:

4xy-2x+2x^2+8x

we can combine the terms that only have an x (Ax for any number A)

in this case that's -2x and 8x

-2x+8x=6x

the other things can't be combined

thus you end up with

4xy+6x+2x^2

8 0

3 years ago

I need help ASAP whit this question

sweet [91]

Answer:

B. 7

Step-by-step explanation:

The original box must be 1 by 1 by 1.

So then the new box would be 2 by 2 by 2.

2×2×2=8

8-1=7

I hope this helps!

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7 0

3 years ago

Twenty toothpicks, each 6 cm long, form a figure consisting of six equilateral triangles and a rectangle as shown. What is the t

Roman55 [17]

The total area of the figure is 139.20 square centimeters

Areas

The area of a shape is the amount of space it occupies

<h3>Composite figure</h3>

The figure (see attachment) is a composite figure, and the total area is the sum of the areas of each shape that makes up the complete figure

The shape has 6 equilateral triangles, each of which has an area of:

$A_1 = \sqrt{\frac{3s^2}{4}}$

Where:

$s = 6$ --- the length of each toothpick

The area of the rectangle is then represented as:

$A_2 =3s \times s$

$A_2 =3s^2$

So, the total area of the figure is:

$Total = 6A_1 + A_2$

This gives

$Total =6 \times \sqrt{\frac{3s^2}{4}} + 3s^2$

Substitute 6 for s

$Total =6 \times \sqrt{\frac{3(6)^2}{4}} + 3(6)^2$

$Total =6 \times \sqrt{27} + 108$

$Total =6 \times 5.20+ 108$

$Total =139.20$

Hence, the total area of the figure is 139.20 square centimeters