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zubka84 [21]
2 years ago
15

Can you help me please ​

Mathematics
1 answer:
Advocard [28]2 years ago
6 0
Honestly, I don’t really know but I believe it’s 3
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each day ashley practices free throws. the first day she takes 12 shots and every day after she takes 2 more than the previous d
morpeh [17]
I added 12+5(2) and got 22. Since 12 was how many shots she made on the first day and she makes 2 more shots than the previous day I did 5x2 which is 10 and add them up it makes 22:)
8 0
3 years ago
A manufacturer of televisions subjects the equipment to a comprehensive testing process for all essential functions before the t
Vikki [24]

Answer:

The value is   P(X \ge 9) = 0.9138

Step-by-step explanation:

From the question we are told that

  The probability of passing the test is  p =  0.95

  The sample size is  n  =  10  

Generally the distribution of the comprehensive testing of equipment  follows a binomial distribution  

i.e  

         X  \~ \ \ \  B(n , p)

and the probability distribution function for binomial  distribution is  

      P(X = x) =  ^{n}C_x *  p^x *  (1- p)^{n-x}

Here C stands for combination hence we are going to be making use of the combination function in our calculators

  Generally the probability that at least 9 pass the test  is mathematically represented as

    P(X \ge 9) =  P(X = 9 ) + P(X = 10 )

=> P(X \ge 9) =  [^{10}C_9 *  (0.95)^9 *  (1- 0.95)^{10-9}] + [^{10}C_{10} *  (0.95)^{10} *  (1- 0.95)^{10-10}]

=> P(X \ge 9) =  [0.3151] + [0.5987]

=> P(X \ge 9) = 0.9138

7 0
3 years ago
If it is 5 F outside and the temperature will drop 17 F in the next six hours , how cold will it get?
lys-0071 [83]
It will be as cold as -12 degrees Fahrenheit
(That’s pretty cold....)
That’s because 5 - 17= -12
Hope this helps :)
3 0
2 years ago
Jon used 64.4 cups of flower to make 8 loaves of bread. How much flower did he use for each loaf?
mestny [16]

Answer:

8.05 cups per loaf

Step-by-step explanation:

divide 64.4 and 8

equation

64.4÷8=8.05

6 0
2 years ago
Read 2 more answers
A home improvement contractor is painting the walls and ceiling of a rectangular room. The volume of the room is 875.00 cubic fe
Reika [66]

Answer:

The room dimensions for a minimum cost are: sides of 10 feet and height of 8.75 feet.

Step-by-step explanation:

We have a rectangular room with sides x and height y.

The volume of the room is 875 cubic feet, and can be expressed as:

V=x^2y=875

With this equation we can define y in function of x as:

x^2y=875\\\\y=\dfrac{875}{x^2}

The cost of wall paint is $0.08 per square foot. We have 4 walls which have an area Aw:

A_w=xy=x\cdot \dfrac{875}{x^2}=\dfrac{875}{x}

The cost of ceiling paint is $0.14 per square foot. We have only one ceiling with an area:

A_c=x^2

We can express the total cost of painting as:

C=0.08\cdot (4\cdot A_w)+0.14\cdot A_c\\\\C=0.08\cdot (4\cdot \dfrac{875}{x})+0.14\cdot x^2\\\\\\C=\dfrac{280}{x}+0.14x^2

To calculate the minimum cost, we derive this function C and equal to zero:

\dfrac{dC}{dx}=280(-1)\dfrac{1}{x^2}+0.14(2x)=0\\\\\\-\dfrac{280}{x^2}+0.28x=0\\\\\\0.28x=\dfrac{280}{x^2}\\\\\\x^3=\dfrac{280}{0.28}=1000\\\\\\x=\sqrt[3]{1000} =10

The sides of the room have to be x=10 feet.

The height can be calculated as:

y=875/x^2=875/(10^2)=875/100=8.75

The room will have sides of 10 feet and a height of 8.75 feet.

4 0
3 years ago
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