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Papessa [141]
3 years ago
6

Helpppppppppppppppppp!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
ozzi3 years ago
4 0

Answer:

i have no idea sorry =(

Step-by-step explanation:

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the monthly utility bills in a city are normally distributed, with a mean of $100 and a standard deviation of $12. Find the prob
vlada-n [284]

Answer:

0.7493 or 74.93%

Step-by-step explanation:

We are given;

Population mean; μ = 100

Population standard deviation; σ = 12

Sample mean 1; x1¯ = 90

Sample mean 2; x2¯ = 120

Z-score formula of the data given is;

z = (x¯ - μ)/σ

z1 = (90 - 100)/12

z1 = -0.83

z2 = (120 - 100)/12

z2 = 1.67

Since we wan to Find the probability that a randomly selected bill is between $90 to $120.

Thus;

P(90 < x¯ < 120) = P(−0.83 < Z < 1.67)

Probability will be gotten from online probability with 2 z-scores calculator to get;

P = 0.7493

7 0
3 years ago
Point Z has the coordinates (−3,5) and is translated left 2 units and down 2 units to create point Z′.
iris [78.8K]

Answer:

(-5, 3)

Step-by-step explanation:

it translated left 2 units => x'= x-2

down 2 units=> y'= y-2

8 0
3 years ago
A rectangular gym has an area of 4x^2 ft². The school decides to add a new weight room. The total area of the gym and the weight
anygoal [31]
For this case the new area is the sum of two areas:
 Area = rectangular gym + weight room
 Area = (4x² + 520) ft²
 In addition, we know that
 rectangular gym = 4x ^ 2 ft²
 Therefore, the term 520 represents a new weight room
 answer
 The constant term represent a new weight room
8 0
3 years ago
Read 2 more answers
Please help me with this ​
MissTica

Answer:

For the question on the right, I assume b is the exponential factor, or growth factor.

Step-by-step explanation:

Linear:

Y=aX + b\\(X, Y) = (0, 15) => b = 15\\(X,Y) = (1, 12) => a = -3\\Y = -3X + 15

You can find the equation by using two points and the equation for a line.

Exponential:

Y = a^{bX+c}\\(X, Y) = (0, 81) => a^{c} = 81 => a^{c} = 3^{4} => a=3, c=4\\(X, Y) = (1, 27) => a^{b+c} = 27 => a^{b}a^{c} = 27 => a^{b} = \frac{27}{81} = \frac{1}{3} => b=-1\\Y = 3^{-X+4}

6 0
2 years ago
A rectangular prism has a length of 3/8 a width of 5/8 and height of 7/8, what is the volume
Allisa [31]
L x w x h
3/8=0.375
5/8=0.625
7/8=0.875
0.375x0.625x0.875 =
0.205078125.......... doesn't seem right but that's what i got

6 0
3 years ago
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