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yawa3891 [41]
3 years ago
5

ss="latex-formula">
​
Mathematics
1 answer:
Georgia [21]3 years ago
5 0

Answer:

answer=cos2 I ---------1

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There are 8 times as many females as males on the maths course at university. What fraction
Serga [27]

Answer:

8/9 of the course are males.

4 0
3 years ago
We wish to construct a 90% confidence interval on the mean of a population known to be normally distributed based on a sample of
sergiy2304 [10]

Answer:

Margin of error = 0.773

Step-by-step explanation:

We are given the following information in the question.

Sample size, n = 20

Sample mean = 8

Sample standard deviation = 2

90% Confidence interval

\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}  

Putting the values, we get,  

t_{critical}\text{ at degree of freedom 19 and}~\alpha_{0.10} = \pm 1.729  

Margin of error:

t_{critical}\displaystyle\frac{s}{\sqrt{n}}  

Putting the values, we get,  

1.729(\frac{2}{\sqrt{20}} ) = 0.773  

7 0
4 years ago
The strength of a cable is proportional to the square of its diameter. If a 2-cm cable will support 800kg, how much will a 3-cm
xz_007 [3.2K]
Strength [is proportional to] d^2
strength1/(d1)^2 = strength2/(d2)^2
800kg/(2cm)^2 = strength2/(3cm)^2
strength2 = 800 kg * (3 cm)^2/(2 cm)^2
strength2 = 800 kg * 3^2/2^2
strength2 = 800 kg * 9/4
strength2 = 1800 kg
3 0
3 years ago
If the area of sector AOC is 12π cm² and the measure of the radius is 6 cm, what is the measure of the central angle in radians?
ella [17]

Answer:

C

Step-by-step explanation:

7 0
3 years ago
Pls help this homework is due tomorrow and I’m so confused thank you for taking your Time x
olchik [2.2K]

Answer:

a)  x= 75

b) 105 is the same angle as angle B, I subtracted 180 by 105

180-105= 75

4 0
3 years ago
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