Answer:
Sergio's statement is false
Step-by-step explanation:
Cost of one pound of plum = 1.60
Total quantity of plum bought = 1
Weight of each plum = 1/4 pound
If he buys plum of $ 3.80 at the rate of $1.60 per pound, he purchases 2.375 pounds of plum
Weight of one plum = 1/4 pound, thus total number of plum purchased = 9.5
Since 0.5 pound of plum means half plum which is not possible to buy
Hence Sergio's statement is false
Percent means per one-hundred. change the mixed number to an improper fraction. rule:
a b/c=(ac+b)/c
20/3 and as a percent p/100 this is:
20/300 so
24(20/300)
480/300
$1.60
Answer:
We need a sample size of 2,071,800 or higher.
Step-by-step explanation:
We have that to find our 
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of 
.
So it is z with a pvalue of 
, so 
Now, we find the margin of error M as such
In which 
is the standard deviation of the population and n is the size of the sample.
In this problem:
We need a sample size of n or higher, when 
. So
We need a sample size of 2,071,800 or higher.
Answer:
-8y = 6
Step-by-step explanation:
-6x+4y = -8
6x -12y = 14
Add the equations
-6x+4y = -8
6x -12y = 14
--------------------
0x -8y = 6
When you look at options b) c) and d) they all have something in common: something happened once, or many times, and from this someone thinks (induces) that this is the rule - this i an example of an inductive reasoning.
The correct answer is a)- the mechanic had a hypothesis which he then tested and rejected - this is how a scientific method works!
