Find the radius of a circle with the given circumference. 15 ft. r = a.30 ft. b.30 ft. c.7.5 ft. d.7.5 ft.

Step-by-step explanation:

We know that , the circumference of a circle is given by :-

, where r is the radius of the circle.

Formula for radius :  

, where C is the circumference of the circle.

Given : Circumference of circle = 15 ft.

Then , the radius of a circle will be :-

Hence, the radius of a circle=

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2

10/60

step-by-step explanation:

if you divide 10 by 60 the answer is 0.166666 while if you divide or solve the other problems it equals 0.6