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diamong [38]
3 years ago
11

Round the decimals to whole numbers to estimate first, then

Mathematics
1 answer:
nika2105 [10]3 years ago
3 0
Pretty sure the answer would be 16.
Because 7.6 rounds to 8 and 1.4 would round up to 2. Then you multiply 8 & 2 and get 16.
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Write an expression for the perimeters of each figure. Simplify the expression.
lyudmila [28]
Question 28:
Perimeter = 3x - 1 + 6 + 3x -1 + 6 = 6x + 10

Question 29:
Perimeter = 4(x + 4) + 2(10.2) = 4x + 16 + 20.4 = 4x  + 36.4
6 0
4 years ago
An incident ray strikes a boundary at a 72. 5-degree angle, resulting in an angle of refraction of 39. 6 degrees. The index of r
LiRa [457]

Refractive index is the ratio of sin(i) to sin (r). Medium 2 is sodium chloride with a refractive index of 1.54.

<h3>What is Refractive Index?</h3>

A material's refractive index (sometimes called refraction index or index of refraction) is a dimensionless quantity that specifies how quickly light passes through it.

As we know that the Refractive index is the ratio of sin(i) to sin (r), and it can be represented as,

\rm Refractive\ Index = \dfrac{Sin(i)}{Sin(r)}

where

i is the incident angle and

r is the refraction angle.

Now, the refractive index can be written as for the given medium can be written as,

\rm Refractive\ Index = \dfrac{Sin(i)}{Sin(r)}\\\\

\rm Refractive\ Index = \dfrac{Sin(79.5)}{Sin(39.6)}=1.542

Now, if we take the ratio of the refractive index of the two mediums, then

\rm 1.542 = \dfrac{n}{1.0003}\\\\n = 1.542 \times 1.0003\\\\n= 1.5425\ \approx 1.54

Hence, Medium 2 is sodium chloride with a refractive index of 1.54.

Learn more about Refractive Index:

brainly.com/question/17156275

8 0
3 years ago
Write the next two terms in the sequence I really need help thanks
Ber [7]
Look at the picture.

7 0
3 years ago
Read 2 more answers
How many tenths are equivalent to 4/5
kramer

Answer: 8

Step-by-step explanation:

You can multiply 4/5 by 2/2, to get the equivalent fraction that is some amount of tenths. Then you'll end up with 8/10.

6 0
3 years ago
What is 3/2 of 2 with answer as a fraction
olya-2409 [2.1K]
To find the answer to this, first, multiply 3 and 2 together, and then dividing it by 2

(3 x 2)/2

3 x 2 = 6

6/2 = 3

3 is your answer.


hope this helps


8 0
3 years ago
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