63 = 9k
divide by 9 on each side to get k by itself
k = 7
<span><span>The probability of all calculators having no defects is 16.8%. The probability of at least one defect is the complement of that probability.
ie an 83.2% probability of at least one defect.</span><span>
</span></span>
Hello there!
Your answer is 114 feet
Hope I helped!
Let me know if you need anything else!
~ Zoe
