Freya is training for a track race. She starts by sprinting 200 yards. She gradually increases her distance, adding 5 yards a da
y for 21 days.
The explicit formula that models this situation is an = 200 + (n – 1)5.
How far does she sprint on day 21?
A. 300 yards
B. 305 yards
C. 205 yards
D. 221 yards
3 answers:
The correct answer is A) 300 yd.
Using the formula, we have 200 + (21-1)(5) = 200+20(5) = 200+100=300
Solution:
we are given that
Freya is training for a track race. She starts by sprinting 200 yards. She gradually increases her distance, adding 5 yards a day for 21 days.
The explicit formula that models this situation is 
we have been asked to find how far does she sprint on day 21?
Substitute the value of n=21 in the given explicit formula we get

Simplify we get



Hence the correct option is A.
205 yards is my answer now
it’s 300 yards my bad
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