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To replace the trees destroyed by typhoon Yolanda, the forestry department

of Tagaytay has developed a ten-year plan. During the first year, they will

plant 100 trees. Each succeeding year, they will plant 50 more trees than they

planted the year before.


SEE

-What kind of sequence is involved in the problem?

values?

PLAN

-What is the appropriate formula to be used and the needed

Formula:

Determine the values of:

a =__

in=__

n=__

d=__

Sn=__

r=__

DO

Perform the indicated operation and simplify it.

-Write the formula. ________________

-Substitute the values. _______________

.

LOOK BACK

-The answer should satisfy all the given information in the problem.

Now, back to the questions:

A. How many trees will they plant during the fifth year?

B. How many trees will they have planted by the end of the tenth year?