Answer:
The standard deviation is 1.5 inches.
Step-by-step explanation:
For a normal curve, we have that the area between the mean and the mean plus two times the standard deviation is something around 47.5%
Then the area between the mean minus two times the standard deviation and the mean plus two times the standard deviation is equal to the 95%.
the mean is 66
if the standard deviation is x, we have that:
66 + 2*x = 69
66 - 2*x = 63
then we can find that:
2*x = 66 - 63 = 3
x = 3/2 = 1.5
The standard deviation is 1.5 inches.
Answer: Game land sells 20 crayons for 5 cents less.
Step-by-step explanation:
Hi, to answer this question we have to calculate the price per crayon in each store, by dividing the amount paid in each case by the number of crayons that each store offers.
Toy world (T): 25/4 = 6.25 cents per crayon
Game land (G): 30/5 = 6 cents per crayon
Now, we have to multiply the cost per crayon by 20.
T=6.25 x 20 = 125 cents
G=6 x 20 =120 cents
So, comparing both costs, Game land sells 20 crayons for 5 cents less.
125-120 = 5 cents
Answer:
Perimeter of square = 4.5 m
Step-by-step explanation:
hope this help brainliest pls
C hope that helped have a great time I love it you can do
3x+15=18 then -15 from each side so x=1