Answer:
20
Step-by-step explanation:
Pythagorean Theorem: a^2 + b^2 = c^2
21^2 + b^2 = 29^2
441 + b^2 = 841
Subtract 441 on both sides to get b^2 = 400
Take the square root of both sides to get b = 20
Answer:
b(a+c) this is answer okay
Answer:
4620 inches
Step-by-step explanation:
The rectangular field of play of American football games measures 100 yards (91.44 m) long between the goal lines, and 160 feet (48.8 m) (53 1⁄3 yards) wide.
Answer:
Step-by-step explanation:
The formula to find the error is:
Where:
is the standard deviation
n is the sample size
So
n = 80 people
= 12 movies
Then
= confidence level = 0.99
We look for the Z value: 
Looking in the normal standard tables
Therefore:
B. the difference between 6 and 4 is doubled ,why? becuz 6-4 is 2 and 2 is doubled by 2 and u get 4 basically 2 times 2 is 4 ..hope this helps!
