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3 years ago

Help me please i dont know how to do this

Mathematics

1 answer:

GuDViN [60]3 years ago

8 0

By the larger circle, they mean the red area plus the white area. We now must calculate the area of both.

Small circle area (white area)= PI * 4.02^2 = 50.77 square inches

TOTAL Circle Area (red and white) = PI * 8.01 *8.01 = 201.56

(Red area)= PI * 8.01^2 -50.77

(Red area)= 201.56 -50.77 = 150.79

A point chosen in the TOTAL 201.5648988136 square inch area has the probability of being in the read area=

red area / TOTAL area = 150.79 / 201.56

probability = .748 = 74.8% of the time.

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The center of a circle lies on the line y = 4x + 1 and is tangent to the x-axis at (−3,0) . What is the equation of the circle i

Hunter-Best [27]

Answer:

$(x+3)^2+(y+11)^2=121$

Step-by-step explanation:

Consider a sketch of the problem as shown in the picture, where:

Blue line is given by y = 4x + 1.
Point B is the center of the circle.
Point A is (-3, 0).

Since the center of the circle lies on the line y = 4x +1 and is tangent to the x-axis at point A, then its radius BA is perpendicular to the x-axis. To find the coordinates of point B, we must replace x = -3 into the blue line equation: y = 4x(-3) + 1 = -11.

So, we know that the center of the circle is at B=(-3, -11). And furthermore, the radius BA is of length r=11.

Since the general equation of the circle of radius lenght r centered at (h, k) is given by

$(x-h)^2+(y-k)^2=r^2$

then with h = -3, k = -11 and r= 11, the equation of our circle is

$(x+3)^2+(y+11)^2=121$

5 0

3 years ago

How many grams are there in 2.5 kilograms

Jobisdone [24]

1 Kg = 1000 g

1000 * 2.5 =

2500 g (your answer)

7 0

3 years ago

Anyone willing to help?? thank u to whoever does help :))

blsea [12.9K]

Answer and Step-by-step explanation:

Yes, the three side lengths could form a triangle.

To find out if the sides can form a triangle, you take the lowest side lengths and add them together. If they are greater than the longest side, then they can form a triangle. If it is equal or less than the longest side, then it CAN NOT form a triangle.

7.8 + 10.4 > 13

18.2 > 13

So, the answer is Yes.

#teamtrees #PAW (Plant And Water)

4 0

3 years ago

Read 2 more answers

Hello please help i’ll give brainliest

dlinn [17]

Answer:

<h2>The sun and the earth's interior </h2>

Step-by-step explanation:

As,

The Earth has two basic sources of energy -

Earth's Interior- hat reaching the Earth from the Sun (Solar Energy) and that reaching the surface of the Earth the Earth itself (Internal or Geothermal Energy). 
Solar Energy - reaches the Earth in the form of radiant energy, and makes up 99.987% of the energy received by the Earth.

5 0

3 years ago

Consider the compound inequality x < 4 and x>a. If a=4 and the compounding word were "or" instead of "and",what would the

FinnZ [79.3K]

Answer:

We have:

x < 4 AND x > a.

if a = 4 and we use an "or" instead of the "and" we have:

x < 4 or x > 4.

This is:

"x is larger than 4 or smaller than 4."

Then the solution of this is all the real numbers except the value x = 4.

The set of solutions can be written as:

{xI x ∈ R \ [4]}

Where this reads:

"x belongs to the set of the reals minus the number 4".

Or we also could write it as:

x ∈ (-∞, 4) ∪ (4, ∞)

Where we have two open ends in the "4" side, so the value x = 4 does not belong to that set.

4 0

3 years ago