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3 years ago

help me ASAP please

Mathematics

1 answer:

xxMikexx [17]3 years ago

5 0

Answer:

Step-by-step explanation:

I think it is D because exponential graphs usually have a curve to them. And the one you need is exponential decay so D is negative and exponential.

HOPE THIS HELPS! HAVE A GREAT DAY!! :)

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Let x be the amount of time (in minutes) that a particular San Francisco commuter must wait for a BART train. Suppose that the d

larisa [96]

Answer:

a) $P(X$

$P(X>14) = 1-P(X$

b) $P(7< X$

c) We want to find a value c who satisfy this condition:

$P(x$

And using the cumulative distribution function we have this:

$P(x$

And solving for c we got:

$c = 20*0.9 = 18$

Step-by-step explanation:

For this case we define the random variable X as he amount of time (in minutes) that a particular San Francisco commuter must wait for a BART train, and we know that the distribution for X is given by:

$X \sim Unif (a=0, b =20)$

Part a

We want this probability:

$P(X$

And for this case we can use the cumulative distribution function given by:

$F(x) = \frac{x-a}{b-a} = \frac{x-0}{20-0}= \frac{x}{20}$

And using the cumulative distribution function we got:

$P(X$

For the probability $P(X>14)$ if we use the cumulative distribution function and the complement rule we got:

$P(X>14) = 1-P(X$

Part b

We want this probability:

$P(7< X$

And using the cdf we got:

$P(7< X$

Part c

We want to find a value c who satisfy this condition:

$P(x$

And using the cumulative distribution function we have this:

$P(x$

And solving for c we got:

$c = 20*0.9 = 18$

3 0

2 years ago

Destiny has 10$ and Elijah has 5$. I give each person the same amount of money each week. This situation can be represented with

Darina [25.2K]

Answer:

I do believe that the answer is 0 solutions.

Step-by-step explanation:

x+10 =x+5

Subtract 5 from both sides, you get:

x+5=x

Subtract x from both sides, and you get:

5=0 which is NOT true. Also I maybe wrong, pls don't be mad at me.

8 0

2 years ago

Given the following geometric sequence, find the 12th term: {2, -4, 8, ...}.

BaLLatris [955]

2 times what = -4?
-2 does
-2 x 2 = -4

-4 time what = 8?
Again, -2.
-2 x -4 = 8

You could do this over and over again or make a table, or you can make a function.
f(n) = f(1) • r $^{n-1}$
f(1) in this case is 2.
f(n) = 2 • r $^{n-1}$
r is rate of change, which is -2.
f(n) = 2 • -2 $^{n-1}$
To find the 12th number in the sequence, just substitute n for 12.
f(12) = 2 • -2 $^{12-1}$
f(12) = 2 • -2 $^{11}$
-2^11 = -2048
2 x -2048 = -4096
So the 12th number in the sequence will be -4096.

3 0

3 years ago

Mr. Medina owns a house that he wishes to sell. The state in which he lives charges a 3.9%

umka21 [38]

Total tax bill is $9,004.50

Given:
Sales price   = 103,500
State sales tax   = 3.9%
County sales tax = 2.9%
City sales tax = 1.9%

State sales tax = 103,500 x 3.9% = 4,036.50
County sales tax = 103,500 x 2.9% = 3,001.50
City sales tax = 103,500 x 1.9% =<u>1,966.50</u>
<span>Total tax   </span> 9,004.50

8 0

3 years ago

Use the formula P = 2 l + 2 w to find the length l of a rectangular lot if the width w is 40 feet and the perimeter P is 200 fee

jeyben [28]

Answer:

l = 60 feet

Step-by-step explanation:

use the equation and plug in the width(40 feet) for w and perimeter(200 feet) for p.

200 = 2l + 2(40)

then solve for l

200 = 2l + 80

120 = 2l

l = 60 feet

5 0

3 years ago

￼help me ASAP please

help me ASAP please