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3 years ago

Jeffrey purchased a card for $180.

SAT

1 answer:

Triss [41]3 years ago

8 0

Where’s the rest of the question? if there was more to the question i could assist you.

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I have a Brainliest reward

notsponge [240]

I believe that A would be your answer because 3.25 + 2.25 + 1.50 = 7 and four percent of seven would be $1.05 and tip is $.28 cents

The second one is C

Hope this helped :)

8 0

3 years ago

The girl in the picture is at the highest point in swinging and starts to come down. Which statement best describes the changes

SpyIntel [72]

When she descends the potential energy will decrease at the same rate that the kinetic energy increases.

<h3></h3><h3>How to describe changes in energy?</h3>

We know that we can write the total energy of a moving object as:

E = U + K

Where U is the potential energy and K is the kinetic energy.

In the given case, U will only depend on the height of the girl and it will be maximized when the height is maximum.

K = (1/2)*m*v^2

where m is the mass and v is the velocity.

When the girl is at the highest point, the velocity becomes equal to zero. This happens because at that point she stops going up and starts going down, so the velocity must be zero at that moment.

Then we have K = 0.

E = U.

As she starts going down, the velocity starts increasing and the height decreases, thus, the kinetic energy increases and the potential energy decreases. This relates to the conservation of energy. E will always be the same value, but K and U will depend on the position of the girl.

This means that if the potential energy decreases a quantity e', then the kinetic energy must be increased by that same amount.

If you want to learn more about energy, you can read:

brainly.com/question/166559

4 0

3 years ago

LENGHT OF ORBIT AND DISTANCE FROM SUN

Dmitry_Shevchenko [17]

Answer:

Earth orbits the Sun at an average distance of 149.60 million km (92.96 million mi), and one complete orbit takes 365.256 days (1 sidereal year), during which time Earth has traveled 940 million km (584 million mi).

7 0

3 years ago

B(n)=2^n A binary code word of length n is a string of 0's and 1's with n digits. For example, 1001 is a binary code word of len

Citrus2011 [14]

Answer:

The additional words is $2^n$

Explanation:

Given

$B(n) = 2^n$

Required

Determine the additional words; i.e. $B(n + 1) - B(n)$

From the given parameters, we have that;

B is a function of n

Such that;

$B(n) = 2^n$

To calculate $B(n+1)$ , we simply substitute n + 1 for n

$B(n) = 2^n$

$B(n + 1) = 2^{n + 1}$

Applying laws of indices

$B(n + 1) = 2^{n} * 2^1$

$B(n + 1) = 2^{n} * 2$

$B(n + 1) = 2(2^{n})$

Calculating Additional Binary Code;

$B(n + 1) - B(n)$

Substitute values for B(n + 1) and B(n)

$B(n + 1) - B(n) = 2(2^n) - 2^n$

Express $2^n$ as $2^ n * 1$

$B(n + 1) - B(n) = 2(2^n) - 2^n * 1$

Express 1 as $2^0$

$B(n + 1) - B(n) = 2(2^n) - 2^n * 2^0$

Factorize

$B(n + 1) - B(n) = 2^n(2 - 2^0)$

$B(n + 1) - B(n) = 2^n(2 - 1)$

$B(n + 1) - B(n) = 2^n(1)$

$B(n + 1) - B(n) = 2^n$

Hence, the additional words is $2^n$

8 0

3 years ago

A conclusion about a plant cell

Veseljchak [2.6K]

Plant cells have certain distinguishing features, including chloroplasts, cell walls, and intracellular vacuoles. Photosynthesis takes place in chloroplasts; cell walls allow plants to have strong, upright structures; and vacuoles help regulate how cells handle water and storage of other molecules.

8 0

3 years ago