Answer:
a. The surface area is
b. The radius is 8 cm
Step-by-step explanation:
The surface area of a beachball is modeled by the function
Where x is the radius of the beachball.
It's given that a beachball of radius 12 cm has a surface area of
This information will allow us to find the value of a by substituting in the model:
Dividing by 144:
a = 1809.56/144
a = 12.57
The model is now:
Now we can solve parts a and b:
a . Find the surface area of a beachball of radius x=15 cm
The surface area is
b. Find the radius of a beachball with a surface area of
We need to solve:
Dividing by 12.57:
Thus:
x=8 cm
The radius is 8 cm
When rounding a number, the digit of the number can be increased up to 1, but the digit won't be decreased. So, it is possible to round a five digit number into six digit number. But to increase the number digit, the number should be rounded up. To be rounded up, a number should have value 5 or more.
Answer:
x=4
Step-by-step explanation:
I guess it’s ii not sure tho