Answer:
False
Step-by-step explanation:
given that a race car driver tested his car for time from 0 to 60 mph, and in 20 tests obtained an average of 4.85 seconds with a standard deviation of 1.47 seconds.
Sample size n = 20
since population standard deviation is not known, we can use t critical value for finding out the confidence interval
df=19
t critical = 2.045
Margin of error = 
conidence interval = Mean±Margin of error
= 
The given confidence interval is (4.52, 5.18)
Hence the statement is false.
We call the ratio between two directly proportional quantities the constant of proportionality. When these two quantities may increase or decrease, the constant proportionality always remains the same
Answer:
2
Step-by-step explanation:
I found this be adding 4 and 6, witch is 2.
450/500 how much you have to how much it costs
this equals to 90 % of the complete cost
100%-90%=10%
you need a 10 % discount
hope this helps
Answer: B.
Step-by-step explanation:
the sum of 5 x 10 with exponent 4 would be 50,000.
multiply that by 12 and it would be 600,000, which is also equal to
6 x 10 with exponent 5.
hope this helps :)
