12.
50/3
14.
60/11
hope this help, if you need futher help pm me
Answer:
97
Step-by-step explanation:
Given that:
Low = 43bpm
High = 115 bpm
Error = 3
α = 90%
To find the range estimate :
Standard destviation = (high - low) / 4
Standard deviation = (115 - 43) / 4
Standard deviation = 72/4 = 18
The sample size,(n) :
n = [(Zα/2 * sd)/E] ²
2 - tail = (Zα/2) = 1.645
[(Zα/2 * sd)/E] ² = [(1.645 * 18) / 3]² = (29.61/3)²
= 97.41
Sample size = 97
Answer:
5.13
Step-by-step explanation:
Look at the number at the end, and if it's 5 or more, round up. the 6 is greater than or equal to 5, so you round up, dropping the six and making the 2 into a 3, giving you 5.13.
Answer: i believe bill saved $21.44
Step-by-step explanation: 68.99-57=11.99
37.80-25%=28.35
37.80-28.35=9.45
9.45+11.99=21.44
Answer:
A=(b^2)h/2
Step-by-step explanation:
