Answer:.
Step-by-step explanation:
42 cakes in 7 days, that's 42/7= 6 cakes per day
6*5=30
Answer:
7.2*10^3.
7,200 in scientific notation, is 7.2*10^3
Answer: Sample size would be 296.
Step-by-step explanation:
Since we have given that
Standard deviation = 4.8 hours
Margin of error = 0.65 hours
At 98% level of confidence, z = 2.33
So, It becomes,

Hence, sample size would be 296.