Answer:
A) The maximum error in the calculated surface area: 
Relative error: 
B) The maximum error in the calculated volume: 
Relative error: 
Step-by-step explanation:
A) The formula for the surface area is:

The measured value is the circumference which is equal to:

then the radius is:

Substituting in the formula of the surface:

Using the formula to calculate the error:

Where
is the variable measured and
is a function of
(
).

We have C=80cm and dC=0.5cm

The relative error is the maximum error divide by the total area. The total area is: 

B) The formula for the volume is:

Using 

The maximum error is:

The calculated volume is:

The relative error is:

Since 17 isnt a factor of 42 the only factor is 1
Answer:

Step-by-step explanation:
we know that
If the measures of the major arc CBD is equal to
degrees
then
the measure of its corresponding central angle is equal to
degrees
so
Convert degrees to radians
Remember that

so by proportion
Convert
to radians
