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2 years ago

A football player kicks a football and records the height of the ball at different times.

Mathematics

1 answer:

Ronch [10]2 years ago

4 0

show to your tcher.....

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Margaret [11]

Oh gosh, that is so cool

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2 years ago

Find f(-5) if f( x ) = | x + 1|.

Alekssandra [29.7K]

Answer:

Step-by-step explanation:

f(x)=x+1

then,

f(-5)=(-5)+1

=-4

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2 years ago

Manuel is putting money into a savings account. He starts with

olga55 [171]

S=350 your starting amount + 30w which is 30× the number of weeks (19) which comes out to give you s=920 if I did it correctly

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2 years ago

4) 8x+4y=-8<br> -x + 4y = -17

horrorfan [7]

Answer:

x=1

y=-4

Step-by-step explanation:

find x by making y to 0
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3 years ago

Customers arrive at a grocery store at an average of 2.1 per minute. Assume that the number of arrivals in a minute follows the

Black_prince [1.1K]

Answer:

a) P(2)=0.270

b) P(X>3)=0.605

c) P=0.410

Step-by-step explanation:

We know that customers arrive at a grocery store at an average of 2.1 per minute. We use the Poisson distribution:

$\boxed{P(k)=\frac{\lambda^k \cdot e^{-\lambda}}{k!}}$

a) In this case: $\lambda=2.1$

$P(2)=\frac{2.1^2 \cdot e^{-2.1}}{2}\\\\P(2)=0.270$

Therefore, the probability is P(2)=0.270.

b) In this case: $\lambda=2\cdot 2.1=4.2$

$P(X>3)=1-P(X\leq 3)\\\\P(X>3)=1-\sum_{x=0}^3 \frac{4.2^x \cdot e^{-4.2}}{x!}\\\\P(X>3)=1-0.395\\\\P(X>3)=0.605$

Therefore, the probability is P(X>3)=0.605.

c) We know that two customers came in in the first minute. That is why we calculate the probability of at least 5 customers entering the other 2 minutes.

In this case: $\lambda=2\cdot 2.1=4.2$

$P(X\geq 5)=1-P(X$

Therefore, the probability is P=0.410.

4 0

3 years ago