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3 years ago

What is the main difference between food chains and food webs?(1 point).

SAT

1 answer:

Svetradugi [14.3K]3 years ago

3 0

Answer:

A food chain is usually a link that describes the feeding relationships between organisms as it travels from producer to each consumer while a food web is usually a combination of food webs that identify the interconnectivity of organisms and predator- prey relationships.

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A wealthy man just died and left his pet dogs the following estate: $20,000 per year for the next 11 years with the first cash f

Andre45 [30]

The concept of present value lets us know that the doggy estate worth in today's dollars is $180614.80

<h3>What is the present value of the doggy estate worth?</h3>

The concept of present value is significant because it enables investors to determine whether the amount they pay for an investment is reasonable. The present value of a future cash flow defines how much it is worth in today's value.

From the given information:

The annual cashflow C = $20,000
Interest rate (i) = 4.2% = 0.042
Number of period (n) = 11

Thus, the present value of the doggy estate can be calculated by using the formula;
$\mathbf{PV = C \times \Big [ \dfrac{1 - \dfrac{1}{(1+i)^n}}{i}\Big] \times (1+i)}$

$\mathbf{PV = 20000 \times \Big [ \dfrac{1 - \dfrac{1}{(1+0.042)^{11}}}{0.042}\Big] \times (1+0.042)}$

PV = $180614.80

Learn more about how to calculate the Present value here:

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2 years ago

Why do you think it is necessary for a student to pay back NSFAS loan after completing studies?

Likurg_2 [28]

Answer:

Personally, I don't think education should be something that should be paid for especially in loans when most schools don't even teach you about the interest of loans or how money works in general.

Explanation:

3 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:

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3 years ago

Maximize the objective function p = 5x + 3y for the given constraints. X ≥ 0 y ≥ 0 3x + 6y ≤ 48 2x + 8y ≤ 56.

ehidna [41]

The maximized value of the objective function is 38

The objective function is given as:

Max P = 5x + 3y

The constraints are given as: