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2 years ago

Write down five limitation experiments in the study of numbers

1 answer:

4 0

Limitation: They may be more expensive and time consuming than lab experiments. Limitation: There is no control over extraneous variables that might bias the results. This makes it difficult for another researcher to replicate the study in exactly the same way.

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An alloy weighing 40 lbs. is 10% tin. The alloy was made by mixing a 15% tin alloy and a 8% tin alloy. How many pounds of each a

Mice21 [21]

X=15% alloy
y=8% alloy
x+y=40
y=40-x
0.15x+0.08y=40*0.10
0.15x+0.08(40-x)=40*0.1
times 100 both sides for easy
15x+8(40-x)=400
15x+320-8x=400
7x+320=400
minus 320 from both sides
7x=80
divide both sides by 7
x=80/7
x+y=40
80/7+y=280/7
y=200/7
aprox
x=11.4lb
y=28.6lb

11.4lb of 15%
28.6lb of the 8%
what????

3 0

3 years ago

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Suppose that a drop of mist is a perfect sphere and that, through condensation, the drop picks up moisture at a rate proportiona

NeX [460]

The volume of a sphere is given by

$V= \frac{4}{3} \pi r^3$

The area of a sphere is given by

$A=4\pi r^2$

$\frac{dV}{dt} \propto A \\ \\ \frac{dV}{dt} = kA$

But

$\frac{dV}{dt} =4\pi r^2 \frac{dr}{dt}$

By substitution,

$4\pi r^2 \frac{dr}{dt}=kA \\ \\ \Rightarrow4\pi r^2 \frac{dr}{dt}=4k\pi r^2 \\ \\ \frac{dr}{dt} =k$

Thus, the <span>drop's radius increases at a constant rate.</span>

6 0

3 years ago

Let f(x) = 2x+4. If f(x) = 16, find x.

jeyben [28]

$f(x)=2x+4$

And we are given that $f(x)=16$ and want to find the value of x. Set f(x) to 16 and we get the equation:

$2x+4=16$

Subtract both sides by 4

$2x=12$

Divide both sides by 2

$x=6$

This is the answer. Let me know if you need any clarifications, thanks!

8 0

3 years ago

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At the end of the summer a store marks down the outdoor furniture 8% a family bought 4 chairs in June at 35$ each then 2 more ch

frosja888 [35]

Answer:

$204.4

Step-by-step explanation:

The four chairs bought in June cost $35 each, all together $140. Then they bought 2 more chairs on sale for 8% off of $35 each or 92% of $35 which is $32.2 each, all together $64.4. Both buy's together would then equal $204.4

7 0

3 years ago

Every economic decision has only positive benefits. gained opportunities. unavoidable limitations. a consequence or tradeoff.

Alina [70]

Every economic decision has "a consequence or tradeoff" - this final answer choice is correct. Every time that an individual, business, or institution makes an economic decision, they always forgo an opportunity to use the same capital or resources for other endeavors. As such, there is a tradeoff incurred by not making the decision to use the resource in another manner. This is known as opportunity cost and is one of the fundamental tenets of economic theory.

3 0

3 years ago

Read 2 more answers