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2 years ago

A lamp in a typical electrical circuit can also be correctly described as

Mathematics

1 answer:

borishaifa [10]2 years ago

3 0

Answer:

A lamp can also be described as circuit.

Step-by-step explanation:

Since the electric current comes from one side (positive) and other side (negative), then what makes it possible to light up is the closing of this simple circuit with the lamp.

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The price of a movie ticket in a given year can be modeled by the regression equation y = 6.94(1.02x), where y is the ticket pri

Whitepunk [10]

I would say that the price would be 176.97.

4 0

2 years ago

Read 2 more answers

The half-life of cesium-137 is 30 years. Suppose we have a 170 mg sample.(a) Find the mass that remains after t years.(b) How mu

saul85 [17]

Answer:

212.9 years

Step-by-step explanation:

Given that the half-life of cesium-137 is 30 years. Suppose we have a 170 mg sample

P0 = 175

P(30) = 87.5

So we can write equation as

$P(t) = 170(\frac{1}{2} )^{\frac{t}{30} }$

b) After 60 years t = 30

In 30 years it becomes half and hence in 60 years it would become 1/4

i.e. $P(60) = 137(1/2^4) = 34.25$ mg

c) If P(t) =1, let us find t

$137(1/2)^{\frac{t}{30} } =1\\\\n = 7.098 years\\n = 7.1*30 = 212.9 years$

212.9

5 0

2 years ago

Solve the compound inequality. Graph the solution set.<br> -2x<2x-4<4

Arte-miy333 [17]

I hope this helps you

-2x <2x-4

4 <4x

1 <x

2x-4 <4

2x <8

x <4

1 <x <4

5 0

2 years ago

The number of newly reported crime cases in a county in New York State is shown in the accompanying table, where x represents th

Novay_Z [31]

Answer:

Step-by-step explanation:

I use 84+ CE

stat edit, then fill in the #s

then

vars 5

then

2'nd stat plot, on

then, click stat

Click arrow 1 time to the left to get to Calc

then click (4)(LinReg(ax+b))

then click enter 5 times

(y=-25.31428571x+1000.285714

y=-25.3x+1000.3

now, lets use computer:

y=-25.31(543)+1000.3

y=-12743.03

round to the biggest whole number )

this doesn't really work, so I will put 1999, 2000, 2001, 2002, 2003, 2004 instead of 0, 1, 2, 3, 4, 5 and do the same thing

now I get

y=-25.31428571x+51603.54286

y=-25.3x+51603.5

now, lets use computer:

y=-25.3(543)+51603.5

y=37865.6

round to the biggest whole number:

y=37866

so, year 37866

7 0

2 years ago

A copper smelting process is supposed to reduce the arsenic content of the copper to less than 1000 ppm. let μ denote the mean a

Hitman42 [59]

The rejection region is give by

$|z_{test}|\ \textgreater \ z_{\alpha/2}$

where the test statistics is given by

$\frac{\bar{x}-\mu}{\sigma/\sqrt{n}} = \frac{980-1000}{100/\sqrt{75}} \\ \\ = \frac{-20}{100/8.6603} = \frac{-20}{11.5470} =-1.73$

i.e. $|z_{test}|=|-1.73|=1.73$

Thus, $z_{\alpha/2}=1.73$

Using the statistical table, the level of the test is 0.04.

6 0

2 years ago