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3 years ago

I'm completely lost?

Mathematics

2 answers:

damaskus [11]3 years ago

5 0

5.6* 10^3
5.6* (1,000)=5,600

1.3* 10^4
1.3* (10,000)=13,000
13,000-5,600=7,400
Liverpool had a greater population by 7,400 people.

aliya0001 [1]3 years ago

4 0

13000-5600=7400...that's about it, just multiply then subtract

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Which of the following is the formula for the volume of a pyramid with base area B and height h?

kolezko [41]

Answer:

Correct choice is A.

Step-by-step explanation:

We have to find about which of the given choices is the formula for the volume of a pyramid with base area B and height h.

We know that formula of volume of pyramid is given by:

$volume = \frac{1}{3}\left(Base\ area\right)\left(Height\right)$

Plug the given values

$volume = \frac{1}{3}\left(B\right)\left(h\right)$

So the correct choice is A.

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3 years ago

Read 2 more answers

A 41 gram sample of a substance that's used to detect explosives has a k-value of 0.1392. Find the substance's half life, in day

-BARSIC- [3]

Answer:

The substance half-life is of 4.98 days.

Step-by-step explanation:

Equation for an amount of a decaying substance:

The equation for the amount of a substance that decay exponentially has the following format:

$A(t) = A(0)e^{-kt}$

In which k is the decay rate, as a decimal.

k-value of 0.1392.

This means that:

$A(t) = A(0)e^{-0.1392t}$

Find the substance's half life, in days.

This is t for which $A(t) = 0.5A(0)$ . So

$A(t) = A(0)e^{-0.1392t}$

$0.5A(0) = A(0)e^{-0.1392t}$

$e^{-0.1392t} = 0.5$

$\ln{e^{-0.1392t}} = \ln{0.5}$

$-0.1392t = \ln{0.5}$

$t = -\frac{\ln{0.5}}{0.1392}$

$t = 4.98$

The substance half-life is of 4.98 days.

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Inga [223]

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Hope this helps.

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3 years ago

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OLEGan [10]

Your answer is A. Y=5- 1/3x

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