It likely represents an image of a triangular prism here.
Answer:
AC and OA
Step-by-step explanation:
-A secant refers to a line that intersects two points on a circle.
-We have a square OABC with each side measuring 6cm and a circle with radius r=5cm, centered at O. The circle's radius is shorter than the side of the square:
-The circle intersectsOA andOC, while it does not intersect AB and BC.
Therefore, AC and OA serve as secants for the circle.
Answer: A total descent of 8260 feet occurred for all four balloons.
Step-by-step explanation:
Based on the information provided:
Number of hot air balloons = 4
Minutes of descent = 7
Descent rate per minute = 295 feet
Thus, the overall change in altitude for all four balloons can be calculated as:
Thus, a total descent of 8260 feet was experienced by the four balloons.
Solution Procedure
Considering the spool as a cylindrical shape, and calculating the circumference based on the area cited, we establish the connection between circumference and area as follows:
... C = 2√(πA)
To find ten times this circumference, we calculate:
... 10C = 20√(π·20 cm²) = 40√(5π) cm ≈ 159 cm
Derivation of Formulas
The standard formulas for circumference and area are:
... C = 2πr
... A = πr²
Multiplying the area formula by π and extracting the square root yields:
... πA = (πr)²
... √(πA) = πr
Doubling this value results in the circumference formula:
... C = 2√(πA) = 2πr
Answer:
CrO₃.
Step-by-step explanation:
First, we will find the chromium percentage in the oxide by using the following process:
Oxygen (O) = 48%
Chromium (Cr) =?
The oxide consists solely of chromium and oxygen, and its chromium percentage is calculated as:
Cr = 100 – percentage of oxygen
Cr = 100 – 48
Cr = 52%
Next, we will determine the empirical formula for the oxide:
Chromium (Cr) = 52%
Oxygen (O) = 48%
Now, we divide by their molar mass:
Cr = 52/52 = 1
O = 48/16 = 3
Now, divide by the lowest value:
Cr = 1/1 = 1
O = 3/1 = 3
Thus, the empirical formula for the oxide is CrO₃.
