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sergejj [24]
2 years ago
14

The diagram shows the entrance to a tunnel.

Mathematics
1 answer:
gladu [14]2 years ago
5 0

Step-by-step explanation:

it filled up half the circle (up to the center point) - if we had a full circle. but a little bit is cut off (below AB).

what we see is that the shaded area is the sum of the area of the triangle AOB and 2 equally sized circle segment areas left and right of AOB.

since we are dealing with a half-circle, we have 180° in total. 120° are taken by AOB, so, that leaves us with 180-120 = 60° for both circle segments (so, one has an angle of 30°).

and 2×30° = 1×60°, so we can calculate the area of one 60° segment instead of two 30° segments.

AOB is an isoceles triangle (the legs are equally long, and therefore also the 2 side angles are equal).

the area of this triangle AOB is

1/2 × a × b × sin(C) = 1/2 × 3 × 3 × sin(120) =

= 3.897114317... m²

a circle segment area of 60° is 60/360 = 1/6 of the full circle area (as a full circle = 360°).

so, it's area is

pi×r² × 1/6 = pi×3²/6 = pi×3/2 = 4.71238898... m²

so, the total area of the shaded area is

3.897114317... m² + 4.71238898... m² =

= 8.609503297... m²

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Ipatiy [6.2K]

Answer:

$10.00 per hour

Step-by-step explanation:

Overhead application rate which is also known as overhead absorption rate on the basis on labor hours is the total budgeted overhead  for 2019 which is $900,000 divided by the expected production of 90,000 labor hours for the year.

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This implies that for every one hour worked overhead cost of $10 would be added to the other costs incurred.

The correct option then is the third option of $10.00 per hour

8 0
3 years ago
Which algebraic expression represents this phrase?
Westkost [7]

The word "product" means <em>multiplication </em>

that means the answer is

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5 0
3 years ago
Javier bought a 20 ounce smoothie that contains 450 total calories how many calories does this smoothie contain per ounce
Olenka [21]

Answer:

22.5

Step-by-step explanation:

You can just take 450 calories divided by 20 ounces. 450 divided by 20 is 22.5, so that is the answer.

3 0
3 years ago
Read 2 more answers
A conditional statement and it's_______ must always have the same truth value.
Romashka [77]
Answer: C) Contrapositive

The original conditional is in the form "If P, then Q"
The contrapositive is in the form "If not Q, then not P"
You flip the order of P and Q, and you also negate each piece. The original conditional and contrapositive can be proven to have the same truth values through the use of a truth table. 
5 0
2 years ago
Help me with this question ​
SashulF [63]

Answer:

15/4

Step-by-step explanation:

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(y₂-y₁)/(x₂-x₁)

Now we plug in the coordinates given to us into the equation:

(5-(-10))/(-1-(-5))

15/4

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