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S_A_V [24]
3 years ago
5

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
Mathematics
3 answers:
Ipatiy [6.2K]3 years ago
8 0
The correct answer is A) 300 yd.

Using the formula, we have 200 + (21-1)(5) = 200+20(5) = 200+100=300
cluponka [151]3 years ago
8 0

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 a_n = 200 + (n-1)5

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

a_{21} = 200 + (21-1)5

Simplify we get

a_{21} = 200 + 20*5

a_{21} = 200 + 100

a_{21} = 300

Hence the correct option is A.

Nett nett2 years ago
0 0

205 yards is my answer now

Nett nett
2 years ago
it’s 300 yards my bad
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