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Salma just started a running plan where she runs 16 miles the first week and then increases the number of miles she runs by 
5% each week. If she keeps up this plan for 6 weeks, how many total miles would Salma have run, to the nearest whole number?
Answer:

Salma just started a running plan where she runs 1616 miles the first week and then increases the number of miles she runs by 5% 5 \% each week. If she keeps up this plan for 66 weeks, how many total miles would Salma have run, to the nearest whole number?\newlineAnswer:

Full solution

Q. Salma just started a running plan where she runs 1616 miles the first week and then increases the number of miles she runs by 5% 5 \% each week. If she keeps up this plan for 66 weeks, how many total miles would Salma have run, to the nearest whole number?\newlineAnswer:
  1. Identify Initial Amount: Identify the initial amount of miles Salma runs and the weekly percentage increase.\newlineSalma runs 1616 miles the first week and increases her running distance by 5%5\% each week.\newlineInitial miles (a)=16(a) = 16\newlinePercentage increase (r)=5%(r) = 5\% or 0.050.05
  2. Calculate Total Miles: Calculate the total miles run for each week using the formula for the total distance after a percentage increase: Total miles for week nn = Initial miles ×(1+r)(n1)\times (1 + r)^{(n-1)}, where nn is the week number.\newlineWeek 11: 16×(1+0.05)(11)=16×(1+0.05)0=16×1=1616 \times (1 + 0.05)^{(1-1)} = 16 \times (1 + 0.05)^0 = 16 \times 1 = 16\newlineWeek 22: 16×(1+0.05)(21)=16×(1+0.05)1=16×1.05=16.816 \times (1 + 0.05)^{(2-1)} = 16 \times (1 + 0.05)^1 = 16 \times 1.05 = 16.8\newlineWeek 33: 16×(1+0.05)(31)=16×(1+0.05)216×1.102517.6416 \times (1 + 0.05)^{(3-1)} = 16 \times (1 + 0.05)^2 \approx 16 \times 1.1025 \approx 17.64\newlineWeek 44: 16×(1+0.05)(41)=16×(1+0.05)316×1.15762518.5216 \times (1 + 0.05)^{(4-1)} = 16 \times (1 + 0.05)^3 \approx 16 \times 1.157625 \approx 18.52\newlineWeek 55: 16×(1+0.05)(51)=16×(1+0.05)416×1.2155062519.4416 \times (1 + 0.05)^{(5-1)} = 16 \times (1 + 0.05)^4 \approx 16 \times 1.21550625 \approx 19.44\newlineWeek 66: 16×(1+0.05)(61)=16×(1+0.05)516×1.276781320.4116 \times (1 + 0.05)^{(6-1)} = 16 \times (1 + 0.05)^5 \approx 16 \times 1.2767813 \approx 20.41
  3. Add Cumulative Distance: Add the total miles run each week to find the cumulative distance run over the 66 weeks.\newlineTotal miles = Week 1+Week 2+Week 3+Week 4+Week 5+Week 6\text{Week 1} + \text{Week 2} + \text{Week 3} + \text{Week 4} + \text{Week 5} + \text{Week 6}\newlineTotal miles 16+16.8+17.64+18.52+19.44+20.41108.81\approx 16 + 16.8 + 17.64 + 18.52 + 19.44 + 20.41 \approx 108.81
  4. Round Total Miles: Round the total miles to the nearest whole number as the question prompt asks for the answer to be rounded.\newlineTotal miles rounded = 109109 (to the nearest whole number)

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