Answer:
60%
Step-by-step explanation:
Total Cards = 5
Even Numbers = 3
P(even) = 3/5
<u><em>In %age:</em></u>
=> 60%
Answer:
7.5 ft²/student
Step-by-step explanation:
This is a "unit rate" problem.
30 ft²
------------------ = 7.5 ft²/student
4 students
Each student will paint 7.5 ft² of the wall.
Answer:
b. We do not have enough information to make a conclusion.
Step-by-step explanation:
For testing difference of means our null hypothesis and alternative hypothesis is
H0: There is no significant difference between the average packing time of old machine and new machine i.e. μold-μnew=0.
Ha:There is significant difference between the average packing time of old machine and new machine i.e. μold-μnew≠0.
When the confidence contains the null values then there is no significant difference exists. Here the specified null value is 0. A 95% confidence interval (-6.85, 0.34) shows that it contains null value so, there is no significant difference between the average packing time of the two machines at 5% level of significance. This results is for 95% confidence interval. For 90% confidence interval result may vary and we don't have sufficient information given to compute 90% confidence interval.
A: We want to take away all the useless numbers that don’t relate to the notebook first, and subtract them.
75 - 6 = 69
69 - 12 = 57
There, now we have to subtract the amount of money she has when she leaves from the total amount spent right now.
57 - 39 = 18
To get the amount spent on all four notebooks, all you need to do is divide by 4
18 / 4 = $4.50
And that’s your answer!
B: $4.50