Answer:
Option (b).
Step-by-step explanation:
Given expression is :
8(1 + 2i) – (7 – 3i)
Using distributive property :
8+16i-7+3i
Taking like terms together,
1+19i
(1+19i) is the simplified expression for the given expression. He did not apply distributive property correctly for 8(1 + 2i). He forgets to multiply 8 with 2i.
Answer: 30% change in the number of unemployed construction workers over this period
Step-by-step explanation:
September 1, 1992
The total number of construction workers = 1,000 (assume);
16% are unemployed, so the number of unemployed workers is 16*1000/100= 160.
September 1, 1996
The total number of construction workers 20% greater 20*1000/100+1000=1200;
9% are unemployed, thus the number of unemployed workers = 9*1200/100=108.
Decrease is 52, which is approximately 30% of 160.
Answer:
7.8
Step-by-step explanation:
I'd explain but you said ASAP.
Answer:
<h2>6.63</h2>
Step-by-step explanation:
Standard error of the mean is expressed as shown below.
SE = S/√n where;
S is the standard deviation
n is the sample suze
Given parameters
Standard deviation = $23.90
sample size = 13
Required
Standard error of the mean for this distribution.
Substituting the given value into the formula we have;
SE = 23.90/√13
SE = 23.90/3.6056
SE = 6.6286
<em>Hence the approximate standard error of the mean for this sample is 6.63</em>
The answer is the last one