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:
Solution:
We know that
Freya is preparing for a race on a track. She begins her training with a 200-yard sprint. Over the next 21 days, she increases her daily distance by 5 yards.
The explicit formula that represents her training is
We need to determine the distance she runs on day 21.
By substituting n=21 into the provided formula, we find
Simplifying leads to
Thus, the correct answer is A.
The right answer is A) 300 yd. Using the formula, we calculate 200 + (21-1)(5) = 200 + 20(5) = 200 + 100 = 300
My final answer is 205 yards.
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Answer:
5 miles in total
Step-by-step explanation:
Given:
Time spent driving = 10 min = 10 / 60 = 1/6 hour
Duration of stop = 5 min
Driving speed = 30 miles per hour
Find:
Complete distance
Computation:
Distance traveled = Speed × time
Distance = 30 × (1/6)
Total distance = 5 miles
E+7 indicates 10 raised to the power of 7, which entails shifting the decimal 7 places to the right, resulting in approximately 38200000.0.