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SSSSS [86.1K]
3 years ago
13

In a class 30 of students, 7 have a cat and 9 have a dog. There are 4 students who have a cat and a dog. What is the probability

that a student has a cat given that they have a dog?
Mathematics
1 answer:
Thepotemich [5.8K]3 years ago
7 0

Answer:

3/20 is the answer

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A bakery bakes 15 batches of 29 cupcakes each week. How many individual cupcakes do they make each week?
mylen [45]

Answer:

435 cupcakes baked in one week if that’s what your asking.

3 0
3 years ago
Read 2 more answers
The difference between teenage female and male depression rates estimated from two samples is 0.07. The estimated standard error
KATRIN_1 [288]

Answer:

The 95%  confidence interval is  0.0112 <  \mu_m - \mu_f < 0.1288

Step-by-step explanation:

From  the question we are told that  

      The  sample  mean difference is  \= x_m - \= x_f  =  0.07

       The  standard error  is  SE  =  0.03

Given that the confidence interval is  95% then the level of significance is mathematically evaluated as

               \alpha  =  100 -  95

               \alpha = 5\%

               \alpha =0.05

Next  we obtain the critical value of  \frac{\alpha }{2} from the normal distribution table, the value is  Z_{\frac{\alpha }{2} } =  1.96

Generally the margin of error is mathematically represented as

         E =  Z_{\frac{ \alpha }{2} } *  SE

substituting values

         E =  1.96 *  0.03

         E =  0.0588

The 95% confidence interval  is mathematically represented as

      (\= x_m - \= x_f  ) - E  <  \mu_m - \mu_f

substituting values

     0.07 - 0.0588  <  \mu_m - \mu_f

    0.0112 <  \mu_m - \mu_f < 0.1288

     

3 0
3 years ago
The diagram shows rectangle ABCD, with diagnal BD. What is the perimeter of rectangle ABCS, to the nearest tenth?
Natalka [10]

Answer:

Perimeter of rectangle ABCD = 32.8 unit (Approx.)

Step-by-step explanation:

Given:

Hypotenuse BD = 12 unit

Angle θ = 30°

Find:

Perimeter of rectangle ABCD

Computation:

Using trigonometry function

Sin θ = Perpendicular / Hypotenuse

Sin 30 = CD / BD

0.5 = CD / 12

Length of CD = 6 unit

Cos θ = Base / Hypotenuse

Sin 30 = BC / BD

0.866 = BC / 12

Length of BC = 10.4 unit

Perimeter of rectangle ABCD = 2[Length + Width]

Perimeter of rectangle ABCD = 2[6 + 10.4]

Perimeter of rectangle ABCD = 2[16.4]

Perimeter of rectangle ABCD = 32.8 unit (Approx.)

6 0
3 years ago
What is the simplified form of the rational expression below? 6x^2-54/5x^2+15x
Triss [41]

Answer:−24/5x^2+15x


Step-by-step explanation:

=6x2+−54/5x^2+15x


=(6x^2+−54/5x^2)+(15x)


=−24/5x^2+15x

3 0
3 years ago
Write a recursive formula for a_na n ​ , the n^{\text{th}}n th term of the sequence 16, -8, 4, ...16,−8,4,....
julia-pushkina [17]

Answer:

aₙ = -2aₙ₊₁

Step-by-step explanation:

According to the sequence given 16, -8, 4, ...

a1 = 16

a2 = -8

a3 = 4

From the values, we can conclude thst;

a1 = -2(-8)

Since a2 = -8, then;

a1 = -2(a2)

Similarly

a2 = -2(4)

a2 = -2a3

The subsequent sequence are;

a3 = -2a4

The nth term will ne;

aₙ = -2aₙ₊₁

Hence the required recursive function is aₙ = -2aₙ₊₁

3 0
3 years ago
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