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2 years ago

I just need help with number 2, thank you

Mathematics

1 answer:

alekssr [168]2 years ago

4 0

It represents the thing the avadocate needs to be muiltiplied by

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Help ! The answer is given but I need to explain how I got it

horsena [70]

Area ( If you know the circumference) :
C^2 / (4×3.14) Brackets are important!
So you have to type :
53.38^2/(4×3.14)
= 226.865

6 0

3 years ago

Problem PageQuestion The mass of a radioactive substance follows a continuous exponential decay model, with a decay rate paramet

asambeis [7]

Answer:

t = 1.51

Step-by-step explanation:

Exponential Model

The exponential model is often used to simulate the behavior of a magnitude that either grow or decay in proportion to the existing amount of that magnitude.

The model can be expressed as

$M=M_oe^{kt}$

In this case, Mo is the initial mass of the radioactive substance and k is a constant which value is positive if the mass is growing or negative if the mass is decaying.

The value of k is not precisely given in the question, we are assuming $k=-0.2$

The model is now

$M=M_oe^{-0.2t}$

We are required to compute the time it takes the mass to reach one-half of its initial value:

$\displaystyle \frac{M_o}{2}=M_oe^{-0.2t}$

Simplifying

$\displaystyle \frac{1}{2}=e^{-0.2t}$

Taking logarithms

$\displaystyle ln\frac{1}{2}=ln(e^{-0.2t})=-0.2t$

Solving for t

$\displaystyle t=-\frac{ln\frac{1}{2}}{0.2}=1.51$

6 0

3 years ago

An item is regularly priced at $35. It is now priced at a discount of 65% off the regular price.

Lady_Fox [76]

Answer:

the final price of the item wud be 15.75

Step-by-step explanation:

7 0

3 years ago

Based on the diagram, which expresses all possible lengths of segment AB? AB = 25 27 < AB < 81 AB = 85 AB< 27 or AB &gt

Thepotemich [5.8K]

The answer

according to the figure, we can solve this problem only by applying sines rule:
that is
sinA/a = sinB/b = sinC /c

As we observe, sin A /54 = sin B/27 = sin C/ c, and c = AB

besides, sinC > sinB > sinA , so the only answer possible is
27 < AB < 81

7 0

3 years ago

Read 2 more answers

Solve for the missing side in the following right triangle: hypotenuse = 17, leg = 8, leg = ?.

krek1111 [17]

Hyp^2 = leg1^2 + leg2^2
hyp^2 -leg1^2 = leg2^2
17^2 - 8^2 = leg2^2
leg2^2 = 289 -64
leg2^2 = 225
leg2 = 15

7 0

3 years ago