Answer:
Area = 153.8 cm/ m
Step-by-step explanation:
Area of circle = 22 ÷ 7 × r²
= 22 ÷ 7 × (7²)
= 22 ÷ 7 × 49
= 3.14 × 49
= 153.8 cm/ m
Answer:
Step-by-step explanation:
Given that a study found that the average stopping distance of a school bus traveling 50 mph was 264 feet.
Sample taken showed the following results

Since population std deviation is known and sample size is large, z test can be used.

(Left tailed test)
Mean difference = 
Std error = 
Z = test statistic = mean diff/std error
= 
p value = 0.00017
Since p < alpha our 0.05 we reject null hypothesis
There is evidence to show that mean is less than 264 feet
(Assumptions:
Sample are randomly drawn
Sample represents the population
2165 people were at the two basket ball games.
Answer:
4
Step-by-step explanation:
I have evidence look at the image
Answer:
a) and b) satisfied the condition of the given equation.
Step-by-step explanation:
Given:
≠
+ 
Then,
≠ 
a) For a = 21, b = 4 and c = -2, then we have;
≠ 
≠ 
≠ 
≠ 
Therefore the condition of the given equation is satisfied.
b) For a = 1, b = 10 and c = 1, then we have:
≠ 
≠ 
≠ 
Therefore the condition of the given equation is satisfied.