English translation:
If the quality control manager wants to estimate the average life of lamps with 20 hours, with a confidence level of 95% and an error of 10% is assumed. What is the sample size?
Clare now has $64 in her bank account.
54 + 10 = 64
See attachment for the answer:
81 square inches
9*9*9=729
729/9(height of cube)=81(length and width of cube=area of cube)
7/8-5/8= 2/8 and if you reduce 2/8 by 2 it becomes 1/4. So 1/4 is your answer. Hope This Helps :D