Answer with explanation:
Given : The heights of a certain population of corn plants follow a normal distribution with mean 
and standard deviation 
a) Using formula 
, the z-value corresponds to x= 135 will be
At x= 155, 
The probability that plants are between 135 and 155 cm tall :-
Hence, 34.73% of the plants are between 135 and 155 cm tall.
b) Sample size : n= 16
Using formula 
, the z-value corresponds to x= 135 will be
At x= 155, 
The probability that plants are between 135 and 155 cm tall :-
Hence,The percentage of the samples would the sample mean height be between 135 and 155 cm.= 93.12%
A composite number is a number that is not prime. Therefore since 43 and 89 are prime,
A. 15,24 is the answer
It would take 26 hours for her to read a 520 page book.
and she can cover 300 pages in 15 hours.
Answer:
Step-by-step explanation:
If two similar triangles have a scale factor of a : b, then the ratio of their perimeters is a : b
(.perimeter ABC) /( perimeter DEF) = (AB)/(DE)
Example:Triangle(ABC) with perimeter 24 . Find new triangle (DEF) using proportion 9/6
24/perim DEF = 6/9
Cross multiplication
(24*9) = 6*( perimeter of DEF)
216 = 6*(perimeter of DEF
Divide both sides by 6
36 = DEF
Triangule with perimeter 24 (find new perimeter)
The perimeter of the new triangle using proportion 6/9 is 36
<span>4y-9=15
Add 9 to both sides.
4y = 24
Divide both sides by 4.
y = 6
The value of y is 6.</span>
