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Sholpan [36]
3 years ago
5

Please help me with this question?

Mathematics
1 answer:
crimeas [40]3 years ago
4 0

Answer:

D)

Step-by-step explanation:

Each longitude has a time difference of 4 minutes.

Convert 4 hours into minutes

4 hours * (60 minutes/1 hour) = 240 minutes

Divide 240 minutes by 4 to obtain the difference in longitude

240/4 = 60

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A sports marketing company interviewed 250 Supersport United fans and has found that the average fan spends R101 on non-ticket p
antiseptic1488 [7]

The 90% confidence interval is between R96.94 and R105.06

The confidence (C) = 90% = 0.9, Mean (μ) = 101, standard deviation (σ) = 39, sample size (n) = 250

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The z score of α/2 corresponds with the z score of 0.45 (0.5 - 0.05) which is equal to 1.645

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2 years ago
Consider z1 = 4 – 4 startroot 3 endrooti and z2 = –16i. What is z1 – z2? 4 – 12startroot 3 endroot i 4 12startroot 3 endroot i 4
dalvyx [7]

The answer is: z_1-z_2=4-4(\sqrt{3i} -4i)

The correct option is: (D)

<h3>What are Complex numbers?</h3>

A complex number is the sum of a real number and an imaginary number. A complex number is of the form a + ib and is usually represented by z. Here both a and b are real numbers. The value 'a' is called the real part which is denoted by Re(z), and 'b' is called the imaginary part Im(z).

Since we have given : z_1=4-4\sqrt{3i} and z_2 = -16i

The difference of z1 - z2 would be:

So,

z_1-z_2=4-4\sqrt{3i} - (-16i)

z_1-z_2=4-4\sqrt{3i}+16i

z_1-z_2=4-4(\sqrt{3i} -4i)

Hence, z_1-z_2=4-4(\sqrt{3i} -4i)

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brainly.com/question/14028757

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