Answer:
True
Step-by-step explanation:
Each x input has 1 y output
S=d/t
s=40/4
s=10
Therefore the average speed of the football is 10yd/s!
Answer:
20000
Step-by-step explanation:
2.8*10^7 = 28000000
1.4*10^3 = 1400
28000000/1400= 20000
Hope this helped!!
Answer:
D. All of the above
Step-by-step explanation:
Samples may be classified as:
Random: Basically, put all the options into a hat and drawn some of them.
Systematic: Every kth element is taken. For example, you want to survey something on the street, you interview every 5th person, for example.
Cluster: Divides population into groups, called clusters, and each element in the cluster is surveyed.
Stratified: Also divides the population into groups. However, then only some elements of the group are surveyed.
In this problem:
Two random samples are selected and combined. The combination is a random sample. So A. is correct.
They are not balanced. More male professors than female are chosen. So B. is correct.
The teachers are divided into groups(male and female). And some members of each group are selected. So C. is correct.
So the correct answer is:
D. All of the above
Answer:
Better deal will be to take money after one year because there will be a profit of $1400 - $1060 = $340
Step-by-step explanation:
It is given that there is two option either you take $1400 after one year or $100 now
It is given that you can invest $1000 at a rate of 6% interest
So interest in one year 
So amount after 1 year = $1000+$60 = $1060
So better deal will be to take money after one year because there will be a profit of $1400 - $1060 = $340
