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3 years ago

Yall can u please help me this is a grade i really need All answers before 9:30

Mathematics

1 answer:

il63 [147K]3 years ago

3 0

Answer:

Step-by-step explanation:

11: 16

12: 43.2

13: 1/18

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Chris's credit card has a restriction that he must pay either 10 percent of the unpaid balance or $25, whichever is greater. Whi

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3 years ago

morgan measures the capacity of a juice glass to be 12 fluid ounces. if she uses the glass to drink 4 glasses of water throughou

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If Morgan drinks 4 glasses of 12 ounces of water, then she drinks 48 fluid ounces throughout the day. There are 16 ounces in one pint. That means, Morgan drinks 3 pints of water!

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3 years ago

Molecules of a toxic chemical eventually decompose into inert substances. Suppose the decomposition time is exponentially distri

koban [17]

Answer:

a) 4.16 years

b) 27.73 years

c) 238.44 years

d) 3,870.53 years

Step-by-step explanation:

Let X be the random variable that measures the decomposition time.

$\bf \lambda =6$

In this case, since the decomposition time is exponentially distributed with a mean of 1/6, we have

$\bf P(X\leq t)=1-e^{-t/6}\Rightarrow P(X>t)=1-(1-e^{-t/6})=e^{-t/6}$

and we must find a t such that P(x>t)=0.5.

$\bf P(X>t)=0.5\Rightarrow e^{-t/6}=0.5\Rightarrow -t/6=ln(0.5)\Rightarrow t=-6ln(0.5)=4.16\;years$

$\bf \lambda =40$

$\bf P(X>t)=0.5\Rightarrow e^{-t/40}=0.5\Rightarrow -t/40=ln(0.5)\Rightarrow t=-40ln(0.5)=27.73\;years$

$\bf \lambda =344$

$\bf P(X>t)=0.5\Rightarrow e^{-t/344}=0.5\Rightarrow -t/344=ln(0.5)\Rightarrow t=-344ln(0.5)=238.44\;years$

$\bf \lambda =5584$

$\bf P(X>t)=0.5\Rightarrow e^{-t/5584}=0.5\Rightarrow -t/5584=ln(0.5)\Rightarrow t=-5584ln(0.5)=3870.53\;years$

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4 years ago

A recent survey of 400 pet owners reveals that the ratio of cat owners to dog owners is 4 to 5. If there are 500 registered cat

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Do 500 divied by 4 and its 125 so 125 people have dogs.

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3 years ago

Read 2 more answers

Solve for x. Show your work.

hram777 [196]

5(5+x) = 6(6+4)
25+5x = 60
5x = 35
x = 7

-----------------
3(3+5) = 4(4+x)
24 = 16 + 4x
4x = 24-16
4x = 8
x = 2

7 0

3 years ago

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