Answer:
Step-by-step explanation:
r^9/r^3
this is equivalent to r^(9-3)=r^6
Answer with explanation:
Let p be the proportion of adults have heard of the new electronic reader.
Given claim : The accompanying technology display results from a test of the claim that 38% of adults have heard of the new electronic reader.
i.e.
Then , the set of hypothesis will be :-

Since, the alternative hypothesis is two tailed , so the test is two-tailed test.
Also, it is given that the sample size : 
Number of adults showed that they have heard of a new electronic reader=522
So the sample proportion for adults have heard of the new electronic reader : 
The test statistic for proportion is given by :-
By using standard normal distribution table , the P-value for two tailed test corresponds to the obtained z-value =
The top side of the coin would be heads
Step-by-step explanation:
Speed =__distancr covered___
Time taken
=5miles ×3miles÷30 mins×45mins
=15miles÷1350mins
=90 mins