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Ray Of Light [21]
3 years ago
11

Can someone help me with this?

Mathematics
2 answers:
Ede4ka [16]3 years ago
4 0
If I’m right the answer is approximately 718.37
Alika [10]3 years ago
4 0
Answer:718.38cm

Explanation: You fill find the volume of the sphere by inserting the radius in volume formula with is 4/3 pie r^2 where r is the radius and youll end up with 1436.76. Then you’ll divide it in half which would look like 1436.76/2 and the answer would be 718.38cm
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a square with side length s has an area of 324 square centimeters. this equation shows the area of the square: s^2= 324. what is
AveGali [126]
If the square has the side s, and area A=324
then s=√324=18
the side of the square is 18cm
3 0
3 years ago
Heelllppppppppp?????
olga nikolaevna [1]

I can't see what you are saying

4 0
3 years ago
The union of two events A and B is the event that: a) The intersection of A and B does not occur. b) Both A and B occur. c) Eith
Wewaii [24]

Answer:

c) Either A or B or both occur.

Step-by-step explanation:

Suppose that we have two events

Event A

Event B

We have that:

A = a + (A \cap B)

In which a a happens and b does not and A \cap B is the probability that aboth events happen

By the same logic, we have that:

B = b + (A \cap B)

The union of events A and B is:

(A \cup B) = a + b + (A \cap B)

Which includes either one of them or both.

So the correct answer is:

c) Either A or B or both occur.

6 0
3 years ago
Help me throughout this question please!!!!!!​
vagabundo [1.1K]

\cos(2A)=\cos^2 A-\sin^2A=(\cos A+ \sin A)(\cos A-\sin A)

substitute the second term in LHS to get

{ (\cos A - \sin A)^2 \over \cos(2A))}

expand the square, \frac{1-2\sin A \cos A}{\cos 2A}= \sec2A- \tan 2A

(\sin (2\theta)=2 \sin\theta\cos\theta)

4 0
3 years ago
Read 2 more answers
A recent study focused on the number of times men and women send a Twitter message in a day. The information is summarized here.
anastassius [24]

Answer:

There is no difference in the mean number of times men and women send a Twitter message in a day

Zmen = 0.4

Zwomen = 0.2

Step-by-step explanation:

Null hypothesis: There is no difference in the mean number of times men and women send a Twitter message in a day

Alternate hypothesis: There is a difference in the mean number of times men and women send a Twitter message in a day

Z = (sample mean - population mean)/(sd ÷ √n)

Zmen = (25 - 23)/(5÷√1) = 2/5 = 0.4

Zwomen = (30 - 28)/(10÷√1) =2/10= 0.2

For a two tailed test, at 0.01 significance level, the critical value is 2.576

0.2 and 0.4 falls within the region bounded by -2.576 and 2.576, so we fail to reject the null hypothesis

There is no difference in the mean number of times men and women send a Twitter message in a day

5 0
3 years ago
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