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2 years ago

Is 7.787878— a rational number?

Mathematics

1 answer:

Vladimir79 [104]2 years ago

5 0

Answer:

yes it is a rational number.

Step-by-step explanation:

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Hi please help me!! thanks

Artist 52 [7]

Answer:

3.2 x 10^13

Step-by-step explanation:

(8x10^4)(4x10^8)

reorder the terms using the commutative property

(8x4)x(10^4x10^8)

multiply

32x (10^4 x 10^8)

= 32 x 10^4+8

= 32 x 10^12

now convert to scientific notation

=3.2 x 10^13

4 0

2 years ago

For the two right triangles above, explain why a/8=x/12 . What trigonometric ratio is also equal to the two given ratios?

frutty [35]

Answer:

sin trigonometry ratio

Step-by-step explanation:

Given

See attachment for triangles

Required

Explain why $\frac{a}{8} = \frac{x}{12}$

From the attached diagram, both triangles are similar triangles because

(1) the second triangle is a dilation of the first triangle by a ratio of 1.5

i.e

$k = \frac{12}{8}$

$k = 1.5$

(2) They have angle 30 degrees, and have their right angles located at the same point

In the first triangle, the sine of 30 degrees is represented as:

$sin(30) = \frac{Opp}{Hyp}$

This gives:

$sin(30) = \frac{a}{8}$

In the second triangle:

$sin(30) = \frac{Opp}{Hyp}$

So:

$sin(30) = \frac{x}{12}$

By comparison:

$sin(30) = sin(3)$

Hence:

$\frac{a}{8} = \frac{x}{12}$

8 0

2 years ago

Help me please i need a respond for each of these quetions

yKpoI14uk [10]

make this question worth more points and people will answer it

5 0

3 years ago

PLZZZZ ANSWER IMAG PLZZZ

Dominik [7]

Answer:

Wouldnt m just be 89?

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

Write 8.54x10 in standard notation

Leokris [45]

Answer:

Should just be 85.4

Step-by-step explanation:

Because 8.54 x 10 is exactly that, 85.4

7 0

2 years ago