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solmaris [256]
3 years ago
7

Which of the following examples demonstrates heat transfer through radiation?

Mathematics
1 answer:
lbvjy [14]3 years ago
3 0
D
The sun heating up a pool.
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Find the value of x. round to the nearest tenth.
lozanna [386]
The value of x is 29
5 0
3 years ago
A building has an entry the shape of a parabolic arch 22 ft high and 28 ft wide at the base, as shown below.
Ivenika [448]
The parabola is at Max of 22
5 0
2 years ago
A tree struck by lightning in a storm breaks and falls over to form a triangle with the ground. The tip of the tree makes a 36°
liraira [26]

Answer: approximately 49 feets

Step-by-step explanation:

The diagram of the tree is shown in the attached photo. The tree fell with its tip forming an angle of 36 degrees with the ground. It forms a right angle triangle,ABC. Angle C is gotten by subtracting the sum of angle A and angle B from 180(sum of angles in a triangle is 180 degrees).

To determine the height of the tree, we will apply trigonometric ratio

Tan # = opposite/ adjacent

Where # = 36 degrees

Opposite = x feets

Adjacent = 25 feets

Tan 36 = x/25

x = 25tan36

x = 25 × 0.7265

x = 18.1625

Height of the tree from the ground to the point where it broke = x = 18.1625 meters.

The entire height of the tree would be the the length of the fallen side of the tree, y + 18.1625m

To get y, we will use Pythagoras theorem

y^2 = 25^2 + 18.1625^2

y^2 = 625 + 329.88

y^2 = 954.88

y = √954.88 = 30.9 meters

Height of the tree before falling was

18.1625+30.9 = 49.0625

The height of the tree was approximately 49 feets

5 0
3 years ago
Use the distributive property to remove the parentheses<br><br>-2(4w-2v-1)
yawa3891 [41]

Answer: -8w+2v+2

Step-by-step explanation:

8 0
1 year ago
Solve the system using the substitution method <br> 4x+6y=8<br> 3x+y=9
inessss [21]
4x+6y=8
3x+y=9

y = 9 - 3x

4x + 6(9-3x) = 8
4x + 54 - 18x = 8
14x = 46
x = 23/7

y = 9 - 3(23/7)
y = 9 - 69/7
y = - 6/7
4 0
3 years ago
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