This is an arithmetic sequence because each term is 1/8 more than the previous term. This is called the common difference and it is what defines an arithmetic sequence.
a(n)=a+d(n-1), where a is 1st term, d is common difference, and n it term #
In this case:
a(n)=3.25+0.125(n-1) or more neatly...
a(n)=3.125+0.125n
a(5)=3.75
Answer: Not safe
Step-by-step explanation:
Let the angle of elevation of the ramp be θ, then:

But the maximum angle for the ramp cannot exceed 7.1°. The calculated angle of elevation will make it difficult, if not impossible, for motorized wheelchairs to get up the ramp.
Therefore, the ramp at the local library is not safe for motorized wheelchairs
Formula for volume= side1*side2*side3
There is not enough information here to answer it... Where is the rest of the question?