1.30 represents the rate of growth of the mold spores. This decimal is a representation of the percentage growth, which would be 130%.
Since the function is written in terms of weeks, x will equal 4 to represent the amount of spores after 4 weeks. Plug the value into the function:
Rounded to the nearest ones value, there will be 985 mold spores after 4 weeks.
Answer:
The area of the shaded region is 125.664 square centimetre
Step-by-step explanation:
Area of the shaded region = area of the circle with radius 7 cm - area of the circle with radius 3 cm----------------(1)
<u>Step 1: Finding the area of the circle with radius 7 cm</u>
Area of the circle A =
On substituting the value of the radius, we get
Area of the circle A =
Area of the circle A = square centimetre----------------(2)
<u>Step 2: Finding the area of the circle with radius 3 cm</u>
Area of the circle a =
On substituting the value of the radius, we get
Area of the circle a =
Area of the circle a = square centimetre ----------------(3)
<u>Step 3: Finding the area of the shaded region</u>
Area of the shaded region =
=
= 125.664 square centimetre
