Find the sum:
Find the
sum:
11 + 12 +
13 + ... + 67 + 68 =
83 + 82 +
81 + 80 + ... + 17 =
11 + 14 +
17 + ... + 47 =
A child
building a tower with blocks uses 150 for the bottom row. Each row has 2 fewer blocks than the previous
row. The last row will have two blocks
and then the child will stop building the tower.
a) How many blocks are used for the 46th
row?
b) How many rows will the tower have?
c) How many blocks will be needed to build the
tower?
Yale Record Club
Yale Record Club made me an offer I
couldn’t refuse. For their cheep, low
price I could buy millions of records, tapes, and compact discs (CDs) and save
millions of dollars. Well, anyway, I
joined. The first month I wanted (and
bought) 3 CDs and the cost was $24.84.
The second month I order 5 for a total of $38.82. Did I mention that the cost covered the CDs
and the shipping and handling? Anyway,
for $31.83, I bought 4 CDs the next month.
I paid $17.85 for 2 discs the next month. I looked through their catalog and picked out
38 more CDs that I wanted to buy sometime.
If I buy all 38 at once, then I only pay the shipping and handling fee 1
time. On the other hand, if I buy them
in smaller groups, well ... What I
really need to know is, how much would it cost to buy all 38 CDs as one order?
Also, what
is the cost of just 1 CD (no shipping and handling)?
What is the
cost of shipping and handling?