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3 years ago

The wavelength of red light in a spectrum is about 0.0000007 meters. Which

Mathematics

1 answer:

Nana76 [90]3 years ago

8 0

Answer:

$0.0000007$

And if we count the number of zeros before the number 7, we can rewrite the number like this:

$7x10^{-7}$

We cansolve this problem also counting the number of positions that we need to move the decimal point to the right in order to obtain the first number (7)

And the best option would be:

B. 7 x 10-7

Step-by-step explanation:

For this case we have the following number given:

$0.0000007$

And if we count the number of zeros before the number 7, we can rewrite the number like this:

$7x10^{-7}$

We cansolve this problem also counting the number of positions that we need to move the decimal point to the right in order to obtain the first number (7)

And the best option would be:

B. 7 x 10-7

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PLEASE HELP GIVING BRAINLY!!

Katena32 [7]

Answer:

C.) the quantitnes are equal

Step-by-step explanation:

<h2><em>Hope this helps and have a great day :)</em></h2>

8 0

3 years ago

Three boxes of supplies have an average (arithmetic mean) weight of 7 kilograms and a median weight of 9 kilograms. What is the

maria [59]

Answer:

Step-by-step explanation:

given data is:

mean = 7 kg
median = 9 kg
total number of boxes = 3

so since we know that the median is 9 and the total boxes are 3. We already know the weight of one of the three boxes.

so we can think of the sum of the three weights in ascending order as: A+9+B.

here A and B are the unknown weights of the remaining two boxes.

We can first use all of the given data in the mean formula

mean = (sum of all weights)/(number of boxes)

put all the known values in the formula

$7 = \frac{A+9+B}{3}$

and rearrange the formula so one of A and B as the subject.

$A = 21 - (9+B)$

now you can use the given values in the Multiple choices from the question and find the maximum value. try each value to be equal to B, so you can find A.

but you need to be smart about it, and keep in mind that the only one of the value of A and B should be greater than the median i.e. 9, or else that will rearrange the way we have set up our boxes:: A + 9 + B (ascending order).

start from (E), where B = 5

$A = 21 - (9+5)$

$A = 7$

here, no value is greater than the median: 3+9+7 (not ascending)

now check (D), where B = 4.

$A = 21 - (9+4)$

$A = 8$

here no value is greater than the median: 4+9+8 (not ascending)

now check (C), where B = 3

$A = 21 - (9+3)$

$A = 9$

here, one of the boxes is equal to the median: 3+9+9 (ascending)

you see a pattern here, the value of A is increasing, thus B is decreasing.

check (B), where B = 2

$A = 21 - (9+2)$

$A = 10$

here, you can realize that B = 2 is not correct since this is not maximum possible weight of the lightest box: 2+9+10 (ascending, but the weight of the lightest box is not maximum possible)

Since, we want maximum possible weight for the lightest box, that is only possible when B = 3 (maximum possible)

8 0

3 years ago

NEED HELP Find values for a, b, c, and d so that the following matrix product equals the 2X2 identity matrix. Explain or show ho

ehidna [41]

We want to find the values of a, b, c, and d such that the given matrix product is equal to a 2x2 identity matrix. We will solve a system of equations to find:

b = 1
a = -1
c = -2
d = -1

<h3>Presenting the equation:</h3>

Basically, we want to solve:

$\left[\begin{array}{cc}-1&2\\a&1\end{array}\right]*\left[\begin{array}{cc}b&c\\1&d\end{array}\right] = \left[\begin{array}{cc}1&0\\0&1\end{array}\right]$

The matrix product will be:

$\left[\begin{array}{cc}-b + 2&-c + 2d\\a*b + 1&a*c + d\end{array}\right]$

Then we must have:

-b + 2 = 1

This means that:

b = 2 - 1 = 1

b = 1

We also need to have:

a*b + 1 = 0

we know the value of b, so we just have:

a*1 + b = 0

a = -1

Now the two remaining equations are:

-c + 2d = 0

a*c + d = 1

Replacing the value of a we get:

-c + 2d = 0

-c + d = 1

Isolating c in the first equation we get:

c = 2d

Replacing that in the other equation we get:

-(2d) + d = 1

-d = 1

d = -1

Then:

c = 2d = 2*(-1) = -2

c = -2

So the values are:

b = 1
a = -1
c = -2
d = -1

If you want to learn more about systems of equations, you can read:

brainly.com/question/13729904

4 0

3 years ago

PLEASE HELP ME IlL MARK U BRAINLEST

pogonyaev

Using the concept of odd and even functions, it is found that the functions are classified as follows:

1. Even.

2. Odd.

3. Neither.

4. Odd.

<h3>What are odd and even function?</h3>

If f(x) = f(-x), the function is even.

If f(x) = -f(-x), the function is odd.

If none of the statements above are true, the function is neither.

For the square function, we have that:

f(x) = x².

f(-x) = (-x)² = x² = f(x).

Hence it is even. The square root function is defined only for non-negative values, hence it is neither odd nor even.

For the cube function, we have that:

f(x) = x³.

f(-x) = (-x)³ = -x³ = -f(x).

Hence it is odd, as is the cube root, as the cube root function is defined for all real values.

More can be learned about odd and even functions at brainly.com/question/24410059

#SPJ1

4 0

2 years ago

One third of the difference of a number and 1.

zlopas [31]

Answer:

1/3x - 1/3

Step-by-step explanation:

First off, we can write this the words as a mathematical equations so its easier to work with:

1/3 (x - 1)

Now we can use distributive property and finally simplify this equation:

1/3 (x-1)

1/3x - 1/3 x 1

1/3x - 1/3

5 0

4 years ago

Read 2 more answers