$69 ÷ 6 = 11.5 per DVD
11.5 × 4 = 46
Answer:
Step-by-step explanation:
15lawns/9hours= 1.6 lawns mowed per hour
1.6lph*27hours=43.2 lawns
Answer: option D
Step-by-step explanation:
The formulae for standard error = standard deviation/√n
But population standard deviation = 1.8 and sample size = n = 81
Standard error = 1.8/√81 = 1.8/9 = 0.2
Answer:
Step-by-step explanation: