Answer:
Try 20.
Step-by-step explanation:
To round 19.5 to the nearest whole number consider the tenths’ value of 19.5, which is 5 and equal or more than 5. Therefore, we have to round up: the whole number part of 19.5, 19, increases by 1 to 20, and the decimal point and all digits (.5) are removed.
19.5 rounded to the nearest whole number = 20
The rate of change is the decrease in altitude per change in two seconds
If the initial altitude is y ft
Answer:
B
Step-by-step explanation:
1/5th the distance is 3/4th hour
We can setup a ratio that gives distance on top and hours on bottom. We can then equate that will what we want (the distance (let it be x) in 1 hour).
Hence,
the fraction on the left side would be 1/5 OVER 3/4 (distance/hours)
the fraction on the right side would be x OVER 1 (we want distance traveled in 1 hour)
Lets do this and cross multiply and find x:
B is the correct answer.
Answer: We reject the null hypothesis, and we use Normal distribution for the test.
Step-by-step explanation:
Since we have given that
We claim that
Null hypothesis :
Alternate hypothesis :
There is 5% level of significance.
So, the test statistic would be
Since alternate hypothesis is left tailed test.
So, p-value = P(z≤-2.31)=0.0401
And the P-value =0.0401 is less than the given level of significance i.e. 5% 0.05.
So, we reject the null hypothesis, and we use Normal distribution for the test.