Step-by-step explanation:
Margin of error = critical value × standard deviation
We aren't given the critical value or any information to calculate it, so we need to make some assumptions. Assuming the data set is large enough to be approximated as normal, and that the confidence level is 95%, then the critical value is 1.96.
ME = 1.96 × 9.5
ME = 18.62
You may choose to round 1.96 to 2, in which case the margin of error is:
ME = 2 × 9.5
ME = 19
Answer:
Step-by-step explanation:
Answer:
w=3
Step-by-step explanation:
The area of the triangle is given by
A = 1/2 bh
the base is 5 and the height is 3
A = 1/2 (3) * 5 = 15/2 units ^2
The area of a rectangle is
A = l*w
A = 5w
The area of the triangle = 1/2 the area of the rectangle
15/2 = 1/2 *5w
15/2 = 5/2 w
Multiply each side by 2/5 to isolate w
2/5 * 15/2 = 2/5 *5/2 w
3 =w
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Answer:
a. x = -5
b. x = -2
Step-by-step explanation:
a.
40=25-3x
40=25-(-15)
x should be -5 for a
b.
-4=1/3(x-10)
-4=1/3(-2-10)
-4=1/3(-12)
x should be -2 for b
