Answer:
1. a=22.18394
2. 13.31803
Step-by-step explanation:
To simplify 4/(2+7i), we multiply it by a fraction equal to one that removes the i value in the denominator. The best value to do this is the complex conjugate divided by itself, so we have 4(2-7i)/((2+7i)(2-7i)). Simplifying, we have (8-28i)/(4-(-49))=(8-28i)/53, which is a completely simplified fraction since 8 and 53 are relatively prime (or coprime), and there are no radicals in the denominator.
The answer is 7/40.
To solve, you have to find the LCM (least common denominator) for 5/8 and 4/5. 5/8= 25/40 and 4/5= 32/40. Subtract and you get 7/40. That is your answer.
Answer:
20 feet
Step-by-step explanation:
13 foot ladder + 7 feet more = 20 feet
Answer:
a) 0.497
b) 0.0047
Step-by-step explanation:
a) The probability that the person actually has the disease
b) The probability that the person actually does have the disease