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Cerrena [4.2K]
3 years ago
8

Aaliyah practices clarinet a total of 11.25 hours in d days. She practices the same amount of time each day. How many hours does

she practice each day?
Mathematics
1 answer:
amm18123 years ago
6 0
6 hours per day lol
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The number of accidents per week at a hazardous intersection varies with mean 2.2 and standard deviation 1.1. This distribution
cluponka [151]

Answer:

Step-by-step explanation:

Hello!

The definition of the Central Limi Theorem states that:

Be a population with probability function f(X;μ,δ²) from which a random sample of size n is selected. Then the distribution of the sample mean tends to the normal distribution with mean μ and variance δ²/n when the sample size tends to infinity.

As a rule, a sample of size greater than or equal to 30 is considered sufficient to apply the theorem and use the approximation.

X[bar]≈N(μ;σ²/n)

If the variable of interest is X: the number of accidents per week at a hazardous intersection.

There is no information about the distribution of this variable, but a sample of n= 52 weeks was taken, and since the sample is large enough you can approximate the distribution of the sample mean to normal. With population mean μ= 2.2 and standard deviation σ/√n= 1.1/√52= 0.15

I hope it helps!

5 0
3 years ago
Which is a difference of cubes?<br><br> x6 – 27<br> x15 – 36<br> x16 – 64<br> x5 – 125
shutvik [7]

Answer:

The correct option is 1.

Step-by-step explanation:

The difference of cubes is defined as

a^3-b^3=(a-b)(a^2+ab+b^2)

The given expression is

x^6-27

It can be written as

x^6-3^3

Using the property of exponent, the above expression can be written as

(x^2)^3-3^3                [\because (x^m)^n=x^{mn}]

This is a difference of cubes.

Therefore the correct option is 1.

6 0
3 years ago
Read 2 more answers
F(x) = -x(2nd power) + 4 when x = 3
Pepsi [2]
F(x) = -x² + 4
f(3) = -3² + 4
f(3) = -9 +4
f(3) = -5
5 0
3 years ago
Sandy had five seashells she gave mageret 3 of them how many are left?
erma4kov [3.2K]
Total shells Sandy had = 5
Shells Mageret got         = 3
Balance of Seashells 
5 - 3
2
8 0
3 years ago
Please help with the math homework below. Thank you.
tigry1 [53]

Answer:

$8 per lirt

Step-by-step explanation:

if the cost per lirt is $8, the $ per hab will be the same. At x = 8, you can see that the two lines intersect

3 0
3 years ago
Read 2 more answers
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