We need to write the sum in this form:

So, we need to find an appropriate sequence, such that
is the i-th even number.
You can easily check that this series is
. In fact, you have

and so on. Finally, we have to observe that we want the first 50 elements of this sequence, since
.
So, the sum can be written as

Answer:
190 square inches
Step-by-step explanation:
Surface area of a rectangular prism formula is given as
2(LW + LH + WH)
Where
L = Length = 5in
H = Height = 3in
W = Width = 10in
Hence:
Surface area = 2(5 × 10 + 5 × 3 + 3 × 10) square inches
= 2 × (50 + 15 + 30) square inches
= 2 × (95) square inches
= 190 square inches
Therefore, the surface area of Erin's jewelry box is 190 square inches
Answer:
Step-by-step explanation:
3.2