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ira [324]
3 years ago
6

The cost of renting a recording studio is $30 for the first hour and $20 for each additional hour

Mathematics
1 answer:
Viktor [21]3 years ago
6 0
Let the number of hours be x
Assume x > 1

Total cost = 30 + 20(x -1) = 30 + 20x - 20 = 10 + 20x
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900 is what percent of 1200
xeze [42]

Answer:

75%

Step-by-step explanation:

900 /1200=  .75=75%

8 0
3 years ago
On any given day, mail gets delivered by either Alice or Bob. If Alice delivers it, which happens with probability 1/4 , she doe
Troyanec [42]

Answer:

(a) The value of fₓ (9.5) is 0.125.

(b) The value of fₓ (10.5) is 0.50.

Step-by-step explanation:

Let <em>X</em> denote delivery time of the mail delivered by Alice and <em>Y</em> denote delivery time of the mail delivered by Bob.

It i provided that:

X\sim U(9, 11)\\Y\sim U(10, 12)

The probability that Alice delivers the mail is, <em>p</em> = 1/4.

The probability that Bob delivers the mail is, <em>q</em> = 3/4.

The probability density function of a Uniform distribution with parameters [<em>a</em>, <em>b</em>] is:

f(x)=\left \{ {{\frac{1}{b-a};\ a, b>0} \atop {0;\ otherwise}} \right.

The probability density function of the delivery time of Alice is:

f(X_{A})=\left \{ {{\frac{1}{b-a}=\frac{1}{2};\ [a, b]=[9, 11]} \atop {0;\ otherwise}} \right.

The probability density function of the delivery time of Bob is:

f(X_{B})=\left \{ {{\frac{1}{b-a}=\frac{1}{2};\ [a, b]=[10, 12]} \atop {0;\ otherwise}} \right.

(a)

Compute the value of fₓ (9.5) as follows:

For delivery time 9.5, only Alice can do the delivery because Bob delivers the mail in the time interval 10 to 12.

The value of fₓ (9.5) is:

f_{X}(9.5)=p.f(X_{A})+q.f(X_B})\\=(\frac{1}{4}\times \frac{1}{2})+(\frac{3}{4}\times0)\\=\frac{1}{8}\\=0.125

Thus, the value of fₓ (9.5) is 0.125.

(b)

Compute the value of fₓ (10.5) as follows:

For delivery time 10.5, both Alice and Bob can do the delivery because Alice's delivery time is in the interval 9 to 11 and that of Bob's is in the time interval 10 to 12.

The value of fₓ (10.5) is:

f_{X}(10.5)=p.f(X_{A})+q.f(X_B})\\=(\frac{1}{4}\times \frac{1}{2})+(\frac{3}{4}\times\frac{1}{2})\\=\frac{1}{8}+\frac{3}{8}\\=0.50

Thus, the value of fₓ (10.5) is 0.50.

5 0
4 years ago
preciso responder essa questão rapido ja tentei de varias formas e nao consegui então vim buscar ajuda espero que olhem e respon
Airida [17]

Answer:

1/ 14336

..... ..... ...... ......

3 0
3 years ago
Giving brainleyest
sweet-ann [11.9K]

Answer:

Answer is 6....this is 100 % correct answer

<h3>Hope this helps u.... ^_^❤️</h3>
5 0
3 years ago
Read 2 more answers
I need help pleaseeeeeeee
Alekssandra [29.7K]

Answer:

T = 7M/N

Step-by-step explanation:

Cross multiply

NT = 7M

Divide by N

NT/N = 7M/N

T = 7M/N

3 0
3 years ago
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