Answer:
ultra violet is visible to the human eye
Answer:
(3.50 x 3) + (3.00 x 4) = $22.50
Step-by-step explanation:
Answer:
Step-by-step explanation:
Equation for the area of a circle- π r²
The 2 radiuses are 6 and 9.
6 squared is 36 and 9 squared is 81.
The smaller one is 36π and the larger one is 81π.
The difference between them is the area of the shaded region.
81π - 36π = 45π
Use 3.14 for π.
45 x 3.14 = 141.3 u²
Hope this helps!
