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2 years ago

Give the final answers in scientific notation

Mathematics

1 answer:

Angelina_Jolie [31]2 years ago

5 0

Answer:

I'm assuming you want me to do 18-23? Okay:

Step-by-step explanation:

<u>18) </u>8.6(10^−4)+6.7(10^−5)

=0.000927 --> 9.27 × 10^-4

<u>19)</u> 3.5(10^3)−9(10^1)

=3410 --> 3.41 × 10^3

<u>20)</u> 5.6(10^4)(4.5(10^6))

=252000000000 --> 2.52 × 10^11

<u>21)</u> 7.6(10^−7)(8.9(10^−2))

=0 --> 0

<u>22)</u> 3.9(10^−12)/4(10^4)

=0 --> 0

<u>23)</u> 1.75(10^5)/5(10^−3)

=35000000 --> 3.5 × 10^7

<em>Please comment below if you would like me to solve #24 :)</em>

<em>The bolded numbers are the answer, the underlined numbers are to show the question number. Hope this helped !!</em>

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

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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

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

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

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Read more about areas at:

brainly.com/question/21135654

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2 years ago

For geometry:(<br><br> i’ll give a brainist!!!

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<h3>Answer: Angle Q = 133 degrees</h3>

========================================================

Work Shown:

Recall that for any triangle, the three angles always add to 180

P+Q+R = 180

(x+13) + (10x+13) + (2x-2) = 180

(x+10x+2x) + (13+13-2) = 180

13x+24 = 180

13x = 180-24

13x = 156

x = 156/13

x = 12

Now that we know x, we can find the angle measures

angle P = x+13 = 12+13 = 25 degrees
angle Q = 10x+13 = 10*12+13 = 120+13 = 133 degrees
angle R = 2x-2 = 2*12-2 = 24-2 = 22 degrees

As a way to check if we have the right answer or not, we see that,

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