Answer:
b
Step-by-step explanation:
So to find how many tenths, or 1/10's, there are in four fifths, or 4/5, divide 4/5 by 1/10.

Now, remember that <u>dividing by a number is equivalent to multiplying by its reciprocal</u>. To find the reciprocal, just flip the numerator and denominator around. In this case, 1/10 would become 10/1. Flip 1/10 to its reciprocal, change the sign to multiplication, and multiply numerators with numerators and denominators with denominators:

<u>In short, there are 8 tenths in four fifths.</u>
Answer:
Step-by-step explanation:
The "template" equation of a circle is:

All you're doing after that, is filling in the blanks:
h = 0
k = 5
r = 5
Step-by-step explanation:

Value 1:
r = 5ft, h = 10ft. Substitute:

Value 2:
r = 2in, h = 4in. Substitute:

Value 3:
r = 6m. Substitute:
