Interest on first loan = 800*.075*2 = 120
<span>so the interest on the second loan </span>
<span>= 138-120 = 18 </span>
<span>using the simple interest formula: </span>
<span>18 = P*.03*2 </span>
<span>P = $300</span>
Left side bottom one
A function is a plot for an equation in 2 variables
Answer:
either 10 or 1.6
Step-by-step explanation:
Answer:
So, the sample mean is 31.3.
So, the sample standard deviation is 6.98.
Step-by-step explanation:
We have a list of data for the speeds (in miles per hour) of the 20 vehicles. So, N=20.
We calculate the sample mean :
So, the sample mean is 31.3.
We use the formula for a sample standard deviation:
Now, we calculate the sum
Therefore, we get
So, the sample standard deviation is 6.98.
Answer: Mean = 52.8 mins
Step-by-step explanation:
We have lapses of 30 minutes, so we can write the average for each, this means that:
0 < t < 30 can be averaged to the middle of the range: 15 min.
Doing this, we have that:
7 students 15 min
27 students 45 min
12 students 75 min
4 students 105 min.
Now we can calculate the mean:
mean = (x1*n1 + x2*n2 + ...)/N
where x1 is the amount of time 1, and n1 is the number of students associated to that time and so on. N is the total number of students
Mean = (7*15min + 27*45min + 12*75min + 4*105min)/(7 + 27 + 12 + 4)
Mean = 52.8 mins
