Answer: 4 x 16 = 64 
16 + 44 = 60
I think..
Step-by-step explanation:
 
        
             
        
        
        
Answer:
a)0.6192
b)0.7422
c)0.8904
d)at least 151 sample is needed for 95% probability that sample mean falls within 8$ of the population mean.
Step-by-step explanation:
Let z(p) be the z-statistic of the probability that the mean price for a sample is within the margin of error. Then
z(p)= where
 where 
- Me is the margin of error from the mean
- s is the standard deviation of the population
a.
z(p)= ≈ 0.8764
 ≈ 0.8764
by looking z-table corresponding p value is 1-0.3808=0.6192
b.
z(p)= ≈ 1.1314
 ≈ 1.1314
by looking z-table corresponding p value is 1-0.2578=0.7422
c.
z(p)= ≈ 1.6
 ≈ 1.6
by looking z-table corresponding p value is 1-0.1096=0.8904
d.
Minimum required sample size for 0.95 probability is 
N≥ where
 where 
- z is the corresponding z-score in 95% probability (1.96)
- s is the standard deviation (50)
- ME is the margin of error (8) 
then N≥ ≈150.6
 ≈150.6 
Thus at least 151 sample is needed for 95% probability that sample mean falls within 8$ of the population mean.
 
        
             
        
        
        
<span>2 significant digits.
       
Let's see what the range of possible values you can have for 1.3540980 if your uncertainty is +/- 2%
2% of 1.3540980 = 0.02 * 1.3540980 = 0.027082
So the lowest possible value for your result is
1.3540980 - 0.027082 = 1.327016
The largest possible result is
1.3540980 + 0.027082 = 1.38117996
Notice that only the 1st 2 digits of the result match which is reasonable since a 2% error means that your result is only accurate to within 1 part in 50.</span>
        
             
        
        
        
Hello ! I'm happy to help 
the answer all revolves around this simple formula:
speed= distance/time 
since you were driving for 1/4 of an hour that's 15 minutes 
and we already know that you traveled 15 miles 
so the speed would equal 15 miles every 15 minutes 
if you want to find the total distance travelled is 15x15 =225