Diagram shows a section of a bridge between the points A and K. The length of line segment is 640 meters. ∆ABC, ∆CDF, and ∆FJK are similar, and 2AC = CF = 2FK. The first pillar, , is 20 meters tall.The area of ∆CDF is square meters.

Answers

Answer 1

Answer: AK = 640
Δ ABC and ΔFJK are similar. They are small triangles.
ΔCDF is the big triangle.

640 / 2 = 320 m= CF
AC & FK= 320/2 = 160 m each

2AC = CF = 2FK
2(160) = 320 = 2(160)

BG = 20 m

20/160 = x / 320
20*320 = 160x
6400 = 160x
6400/160 = x
40 = x

Area of CDF = (40 m * 320 m)/2 = 12,800 / 2= 6,400 m²

Answer 2

Answer:

6,400 meters squared on plato. Just took the test and it is correct.

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At maximum speed, an airplane travels 2460 miles against the wind in 6 hours. Flying with the wind, the plane can travel the same distance in 5 hours, What is the speed of the plane with no wind?

Answers

451 miles per hour

distance = rate x time
against the wind this relationship is 2460 = (r-w) x 6
with the wind this relationship is 2460 = (r+w)5

solving those two equations for r (which is the rate the plane flies) gives 902 = 2r which gives r = 451mph.

Planck's constant is best described as which of the following?a. a very large positive number
b. a very small positive number
c. a very large negative number
d. a very small negative number

Answers

b is the answer i believe

Solutions

We know that the Planck constant is defined by the equation: E = h\nu. I believe the correct answer is (B)

(B) = a very small positive number

Decide whether this statement is always true, never true, or sometimes true, and explain why: In a quadratic equation of the form 0 = ax2 + bx + c, there will be two real solutions if a and c are of opposite signs

Answers

Answer:

Always true

Step-by-step explanation:

Here, we want to evaluate if the given statement is true

The discriminant D can be calculated using the formula;

b^2 - 4ac

if D is greater than 0, then we will have only real roots

In a case where a and c are of opposite signs;

then -4ac will always give a positive value which can be added to b^2

This positive value will ensure that D is greater than zero and hence we can have only real roots

So this assertion is always true if a and c are of opposite signs

If your state has a property tax rate of 0.056, and you pay $3,164.45 in property taxes every year, what is the assessed value of your property?a. $177,209
b. $21,265
c. $56,508
d. $48,684

Answers

The assessed value of your property is $56,508.

Given that, the rate of property tax=0.056 and tax money=$3,164.45.

What is a tax?

Money that the government collects is based on income, sales, and other activities.

Let the assessed value of your property is x.

Now, 0.056×x=3,164.45

⇒x=3,164.45/0.056

⇒x=56,508.035≈56,508

Therefore, the assessed value of your property is $56,508.

To learn more bout the tax visit:

brainly.com/question/12611692.

#SPJ5

If your state has a property tax rate of 0.056, and you pay $3,164.45 in property taxes every year,
=>$56,508 * 0.056 = $3,164.45
Therefore the value of his property is 56 508 dollars.

Can someone write out the steps on how to verify this identity?