Question

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 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

Answer 1

300 yards

Explanation:APEX

Answer 2

300

Step-by-step explanation

At first Freya started with 200 yards.

Then she gradually increased her distance by adding 5 yards a day for 2 days.

The formula for the model is given by;

X=200+(n-1)5. Where X=the distance she sprint on day 21

X=200+(21-1)5

X=200+ (20)5=300 yards