Answer:
- 1.25 hours or 1 hour and 15 minutes
Step-by-step explanation:
<em>Question</em>
- <em>Lisa lit a candle with a height of 8 inches. When lit, this candle loses 10% of its original height every hour. </em>
- <em>Please complete the following sentence by writing the number in the blank.
Until the candle has been burning for at least _______ hours, the height of Jennifer's candle will be more than 7 inches.</em>
<u>Candle looses 10% of 8 inches, it equals:</u>
- 8*0.1 = 0.8 inches an hour
<u>Let x be required time, then:</u>
- 8 - 0.8x > 7
- 0.8x < 8 - 7
- 0.8x < 1
- x < 1/0.8
- x < 1.25
- or 1 hour 15 minutes
The area of a circle = pi * radius squared. so if the area = 136.45, start by dividing by pi to get about 43.43. this means the radius squared = 43.43. square root both sides to get about 6.59 = radius of the circle. the circumference can be found by multiplying the diameter * pi. since the diameter = the radius * 2, we know the diameter of the circle is 13.18. multiply by pi to find the circumference, which would be about 41.41.
-3 ; -2 1/2; -2 2/5; -2 3/10; -2;
As what I can observe, the pathway can be formed with 2 right triangles. Thus, I'll get the area of the 2 right triangles and multiply its area by the paving cost per square meter.
Area of Right Triangle: ab / 2
a = 6 2/3 m ⇒ 20/3 m; b = 3m
Area of 1 triangle= (20/3 m * 3 m) ÷ 2 = 20 ÷ 2 = 10 m²
Area of 2 triangles = 10m² * 2 = 20 m²
Total cost = $40 * 20m² = $800
Step-by-step explanation:
the set F of the factors of 6 :
F ={1, 2, 3, 6}
