Answer:
20.3
Step-by-step explanation:
When u add it stays the same but for subtraction u change the sign.
Example: 2- (-5)=7
Answer:
there are 15 birds all together and 5 black birds on the tree.
Step-by-step explanation:
Answer:
b.
Step-by-step explanation:
5*30+3*45>300
150+135
30+45=75
Answer: option 1
Step-by-step explanation: By constructing a 99% confidence interval for population proportion, it implies that the principal is 99% sure that the confidence interval will contain the population proportion.
When we construct confidence interval, we do so to show that the population parameter that we are looking for is present in the interval at a specified confidence level.
