Answer:
3 hours.
Step-by-step explanation:
divide 1620 by 540.
=
Cross multiply. (7)(x) = (5)(x - 2)
7x = 5x - 10
Subtract 5x from both sides.
2x = -10
Divide both sides by 2.
x = -5
Answer:
B
Step-by-step explanation:
Yes, because the sample size is at least 30, and we have a random sample.
We have our sample size to be 33% of the student = 33 student (approx)
- According to conditions of normality which states that the sample size collected from a normally distributed population with 100 students should have a sample size of at-least 30 students.
- This condition approximates that the sample collected is also random and and follows a normal distribution like the population ( i.e total number of students = 100 ) itself.
- However, the spread of the data sigma = 3,000 is very large but it does not invalidates the condition of normally distributed sample, it only means that values are spread wide about the mean = 400.
Answer:
how many times larger? 4 times as large
Step-by-step explanation:
if the radius is half as big as the diameter and the diameter is half of the area
<u>r</u> x <u>r</u> = d
<u>d</u> x <u>d</u> = a
keeping in mind that perpendicular lines have negative reciprocal slopes, let's check for the slope of the equation above
so we're really looking for the equation of a line whose slope is 5/2 and it passes through (-2 , 14)