Answer:
Step-by-step explanation:
we are given r and the formula
we want to find the surface area of the shpare with the given r
to do so
we need our algebra skills
substitute the value of r:
recall law of exponent
to simplify:
simplify multiplication:
distribute:
hence our answer is F
Answer:
Step-by-step explanation:
when adding logs, apply the log rule: 
∴ 
when subtracting logs, apply the log rule: 
The answer is =
Any number divided by itself = 1
Answer:
26 i think
Step-by-step explanation:
The second angle would be 140⁰. When two angles are supplementary, they add up to 180⁰.
180⁰-40⁰=140⁰
