Answer:
the length is 6cm and the height is 9cm
Step-by-step explanation:
because 9x6=54
Using the z-distribution, it is found that the 95% confidence interval to estimate the mean SAT math score in this state for this year is (472, 488).
We have the <u>standard deviation for the population</u>, which is why the z-distribution is used to solve this question.
- The sample mean is .
- The population standard deviation is .
- The sample size is .
The interval is given by:
We have to find the critical value, which is z with a p-value of , in which is the confidence level.
In this problem, , thus, z with a p-value of , which means that it is z = 1.96.
Then:
The 95% confidence interval to estimate the mean SAT math score in this state for this year is (472, 488).
A similar problem is given at brainly.com/question/22596713
Answer:
x = 1/72
Step-by-step explanation:
72(x)=1
We need to isolate x, and since x is being multiplied by 72, we can isolate it by dividing both sides by 72.
72x/72 = 1/72
x= 1/72
Answer:
tickets: $14
popcorn: $10
total: $24
Step-by-step explanation:
2 movie tickets at $7 each is 2*7 which is $14
2 buckets of popcorn at $5 each is 2*5 which is $10
adding these together we get a total spending of $24
Answer:
The machine takes 25 minutes to make 5 chairs. It would take the machine 160 minutes to make 32 chairs.
Step-by-step explanation:
Divide 2 chairs by 10 minutes to find the amount of chairs made per minute.
2/10 = 0.2 chairs per minute
Divide 5 chairs by 0.2 chairs per minute to find how much time it takes to make 5 chairs.
5/0.2 = 25 minutes
It takes the machine 25 minutes to make 5 chairs.
Divide 32 chairs by 0.2 chairs per minute to find how much time it takes to make 32 chairs.
32/0.2 = 160 minutes
It takes the machine 160 minutes to make 32 chairs.