Math Answers

z₁=3.45∠980°

z₂₌-5+9i

1. z1+z2 final answer in polar form
2. z1-z2 final answer in trigonometric form
3. z2*z1 final answer in exponential form
4. z1/z2 final answer in rectangular form

z₁=3.45∠980°

z₂₌-5+9i

1. z1+z2 final answer in polar form
2. z1-z2 final answer in trigonometric form
3. z2*z1 final answer in exponential form
4. z1/z2 final answer in rectangular form

z₁=3.45∠980°

z₂=5+9i

1. z1+z2 in polar form
2. z1-z2 trigonometric form
3. z2*z1 exponential form

How many scores are above 116?

assuming that Huawei produces 5% of their total production of smartphones are defective. If 10 items are to be chosen at random from the production line, what then is the probability that;

a. all smartphones are not defective?

b. at most 2 of the smartphones are defective?

c. at least 3 of the smartphones are defective?

Suppose the production cost is R 18 925, Labour cost is and equipment renting fee is R250, determine the number of devices produced

1. Between z = 0 and z = 1.36

Let X be the random variable such that : P(X = –2) = P(X = –1), P(X = 2) = P(X = 1) and P(X > 0) = P(X < 0) = P(X = 0). Obtain the probability mass function of X and its distribution functions

In an intelligence test administered on 1000 children, the average was 60 and the standard deviation was 20. Assuming that the marks obtained by the children follow a normal distributed, find the number of children who have scored (i) over 90 marks, (ii) below 40 marks and (iii) between 50 and 80 marks. Given that P(0 < Z < 1.5) = 0.4332; P(Z < 1) = 0.8413; P(Z < 0.5) = 0.6915. 

A population consists of the values (1,3,5,7) consider a sample size of two that can be drawn from this population