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2 years ago

SHOW YOUR WORK 20x4.17

Mathematics

2 answers:

alisha [4.7K]2 years ago

8 0

20x4.17
Answer = 83.4

pshichka [43]2 years ago

3 0

Answer:

83.40

Step-by-step explanation

_______________2 0________

× 4 1 7

________________________

+ 1 4 0

+ 2 0

+ 8 0

___________________________

= 8 3. 4 0

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Evaluate the following numerical expressions. 6 + 23 • 3 =

klasskru [66]

6 + 23(3)

6 + 69

Hope this helps! ;)

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2 years ago

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Customers arrivals at a checkout counter in a department store per hour have a Poisson distribution with parameter λ = 7. Calcul

IgorLugansk [536]

Answer:

(1)14.9% (2) 2.96% (3) 97.04%

Step-by-step explanation:

Formula for Poisson distribution: $P(k) = \frac{\lambda^ke^{-k}}{k!}$ where k is a number of guests coming in at a particular hour period.

(1) We can substitute k = 7 and $\lambda = 7$ into the formula:

$P(k=7) = \frac{7^7e^{-7}}{7!}$

$P(k=7) = \frac{823543*0.000911882}{5040} = 0.149 = 14.9\%$

(2)To calculate the probability of maximum 2 customers, we can add up the probability of 0, 1, and 2 customers coming in at a random hours

$P(k\leq2) = P(k=0)+P(k=1)+P(k=2)$

$P(k\leq2) = \frac{7^0e^{-7}}{0!} + \frac{7^1e^{-7}}{1!} + \frac{7^2e^{-7}}{2!}$

$P(k \leq 2) = \frac{0.000911882}{1} + \frac{7*0.000911882}{1} + \frac{49*0.000911882}{2}$

$P(k\leq2) = 0.000911882+0.006383174+0.022341108 \approx 0.0296=2.96\%$

(3) The probability of having at least 3 customers arriving at a random hour would be the probability of having more than 2 customers, which is the invert of probability of having no more than 2 customers. Therefore:

$P(k\geq 3) = P(k>2) = 1 - P(k\leq2) = 1 - 0.0296 = 0.9704 = 97.04\%$

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2 years ago

What are the zeros of f(x) = x2 + 3x - 10?

Zielflug [23.3K]

Answer:

(x+5) (x-2)

SO -5 and 2 option A

Step-by-step explanation:

factor it. and set equal to zero.

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2 years ago

(easy) If ΔEFG ~ ΔLMN with a ratio of 3:1, which of the following is true?

alexandr402 [8]

Answer:

segment EG over segment LN equals segment FG over segment MN

Step-by-step explanation:

we know that

If two figures are similar, then the ratio of its corresponding sides is proportional and its corresponding angles are congruent

In this problem

The corresponding sides are

EF and LM

EG and LN

FG and MN

The corresponding angles are

∠E≅∠L

∠F≅∠M

∠G≅∠N

therefore

EF/LM=EG/LN=FG/MN=3/1

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3 years ago

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What must be true in order for P (A or B) = P(A) + P (B)?

snow_tiger [21]

For the equation to be true, the events A and B must be mutually exclusive.

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3 years ago

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