The circumference of a circle is 25.13 cm and the diameter of a circle is 8 cm what is the approximate value of the quotient of c / d

3.142.

Generally, the value of the ratio of the circumference of any circle to its diameter is pi.

Proof?

Circumference, C= π.d

Diameter, d=d

So

C:d=π.d÷d

=d

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).