Answer:
C.
1.8 hours
Step-by-step explanation:
total homework time = math homework time + non math homework time
math homework time = 5 problems * 2 minutes/problem
= 10 minutes
= 10 minutes * 1hr/60 minutes = .167 hrs
non math homework time = 1.6 hours
total homework time = math homework time + non math homework time
total homework time = .167 + 1.6
total homework time = 1.77 hrs
rounding
total homework time = 1.8 hrs
Answer:
Now we can calculate the p value with this probability:
Since the p value is lower than the significance level of 0.05 we have enough evidence to reject the null hypothesis and we can conclude that the true mean is significantly different from 28 at 5% of significance.
Step-by-step explanation:
Information given
represent the sample mean for the blood cell
represent the population standard deviation
sample size
represent the value to check
represent the significance level
z would represent the statistic
represent the p value
System of hypothesis
We want to verify if the mean blood cell volume is different from 28 ml/kg the system of hypothesis would be:
Null hypothesis:
Alternative hypothesis:
Since we know the population deviation we can use the following statistic:
(1)
Replacing the info given we got:
Now we can calculate the p value with this probability:
Since the p value is lower than the significance level of 0.05 we have enough evidence to reject the null hypothesis and we can conclude that the true mean is significanctly different from 28 at 5% of significance.
You multiply the number of different cookies by the number of people. so 9
45x +40(x+0.5) =270
45x +40x +20 =270
85x = 250
x = 250/85 = 2.94
45 * 2.94 = 132.3 miles
40*(2.94 +0.5) = 40*3.44 = 137.6
2.94 hours
Compare: there are 2 other sevens in the number contrast: the sevens are in different place values