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3 years ago

Use the chart below to answer the question

Mathematics

1 answer:

Anuta_ua [19.1K]3 years ago

8 0

Answer:

Denmark has the greatest population density, While the USA has the least density population

Step-by-step explanation:

When Calculating Population Density you use d = p/a

Which would make the USA density population

USA

29.12 = 272,648,000 / 9,364,520

Denmark

124.72 = 5,248,000/42,077

Ghana

77.21 = 18,339,000/237,533

Where D is the density, P is the population, A = the area.

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WHOEVER IS CORRECT GETS 55 POINTS!!! PLZ HELP FASTTTTT!!!!!!!martin throws a ball straight up in the air. the equation h(t)=-16t

weqwewe [10]

Given that Martin throws a ball straight up in the air.

The equation $h(t)=-16t^2+40t+5$ gives the height of the ball, in feet, t seconds after martin releases it.

We need to determine the time that it takes the ball to hit the ground.

Time taken:

To determine the time 't', let us equate h(t) = 0 in the equation $h(t)=-16t^2+40t+5$

Thus, we have;

$0=-16t^2+40t+5$

Switch sides, we get;

$-16 t^{2}+40 t+5=0$

Now, we shall solve the equation using the quadratic formula.

Thus, we have;

$t=\frac{-40 \pm \sqrt{40^{2}-4(-16) 5}}{2(-16)}$

Solving, we get,

$t=\frac{-40 \pm \sqrt{1600+320}}{-32}$

$t=\frac{-40 \pm \sqrt{1920}}{-32}$

$t=\frac{-40 \pm 8\sqrt{30}}{-32}$

$t=\frac{8(-5 \pm \sqrt{30})}{-32}$

Cancelling the common terms, we get,

$t=\frac{-5 \pm \sqrt{30}}{-4}$

Thus, the roots of the equation $t=\frac{-5 + \sqrt{30}}{-4}$ and $t=\frac{-5 - \sqrt{30}}{-4}$

Simplifying the roots, we get,

$t=\frac{-5 +5.477}{-4}$ and $t=\frac{-5 -5.477}{-4}$

$t=-0.119$ and $t=2.619$

Since, t cannot take negative values, then $t=2.619$

Hence, It takes 2.6 seconds for the ball to hit the ground.

8 0

4 years ago

William went to the shop with $20.00. He bought a bag, water bottle and shirt. He came home with $1.50. $150 be a positive or ne

Mnenie [13.5K]

Answer:

Positive

Step-by-step explanation:

How much was the bag bottle and shirt. Figure that out and you get the answer. But the real answer should be negative. But the actual answer is positive.

6 0

3 years ago

blanca buys 2 gallons of green paint. She uses 5 quarts to paint her front and 1/2 quart to paint the front porch swing

sukhopar [10]

Paint unused is 0.625 gallons.

Step-by-step explanation:

Quantity of green paint bought = 2 gallons

Now we have to convert gallons to quarts using the conversion factor

1 gallon = 4 quarts

2 gallons = 2 × 4 quarts = 8 quarts

Usage of paint her front = 5 quarts

Usage of paint the front porch swing = $$\frac{1}{2}$ quart = 0.5 quart

So used paint = 5 + 0.5 = 5.5 quarts

To find the unused paint, we have to subtract the used quantity from already bought.

Unused paint = 8 quarts - (5.5 quarts) = 2.5 quarts.

So Unused green paint is 2.5 quarts or 0.625 gallons.

3 0

4 years ago

Two lines intersect in the figure below. what is the value of x?

BaLLatris [955]

Answer:

A. 17

Step-by-step explanation:

The angles are adjacent, meaning they are congruent. So you will set (5x + 6) equal to 91

(5x + 6) = 5x + 6

5x + 6 = 91

5x + 6 - 6 = 91 - 6

5x = 85

5x / 5 = 85 / 5

x = 17

4 0

3 years ago

Will you get the same number of factors if you multiply a prime number by itself

Rina8888 [55]

Answer:

Well i'm not very sure.. but to my knowledge, yes!

Step-by-step explanation:

7 0

3 years ago