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

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.

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )