$\bf \textit{surface area of a sphere}\\\\
A=4\pi r^2\qquad 
\begin{cases}
r=radius\\
-----\\
A=12.56
\end{cases}\implies 12.56=4\pi r^2
\\\\\\
\cfrac{12.56}{4\pi }=r^2\implies \sqrt{\cfrac{12.56}{4\pi }}=r$

8 0

3 years ago

Ruth has 12 feet of ribbon. She uses 7 feet of it for a craft project and gives 28 inches of it to her sister. How many inches o

Margaret [11]

Answer:

32 Ribbon's left

Step-by-step explanation:

5 0

3 years ago

Determine weather the pair of sets is equal ,equivalent,both or neither

spin [16.1K]

Answer:

Equivalent

Step-by-step explanation:

The sets are not equal since computer science is not the same as algebra.

Equal means exactly the same

Equivalent means they have the same number of items in them

If they are equal, they are equivalent

7 0

3 years ago