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2 years ago

A quantity with an initial value of 670 decays continuously at a rate of 25% per hour.

Mathematics

1 answer:

AysviL [449]2 years ago

4 0

Answer:

89.43

Step-by-step explanation:

a = 670 * (1 * .25)^7

a = 670 * (.75)^7

a = 89.43

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What is the area of this face?

Burka [1]

If the answer you were looking for was long and had a E in it, it would be 2.79552e10

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2 years ago

You have $138 in a savings account and save $12 per week. Your friend has $98 in a savings account and saves $17 per week. How m

r-ruslan [8.4K]

Solution

Provided :-

• I have $138

• I save $12 per week

• Friend have $ 98

• He saves $17 per week

Let the number of weeks required to have same balance be x

→ 138 + 12x = 98 + 17x

→ 138 - 98 = 17x - 12x

→ 40 = 5x

→ x = 8

So we need 8 weeks

4 0

2 years ago

Read 2 more answers

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musickatia [10]

1 because it is reveresed

7 0

2 years ago

Read 2 more answers

A thread is wound 200 times round a reel of diameter 5 cm. Use the value 3 for it to find the approximate length of the thread i

Radda [10]

Answer:

Length of the thread = 30 metres

Step-by-step explanation:

Length of the thread in one round of a reel = Circumference of the reel

C = $2\pi r$

Since radius of the reel = $\frac{\text{Diameter}}{2}$

= $\frac{5}{2}$

= 2.5 cm

Circumference of the reel = 2(π)(2.5)

= 5π

= 5×3

= 15 cm

Length of the thread wound in one round around the reel = 15 cm

Since, thread is wound 200 times round a reel, length of the thread

= 200 × 15

= 3000 cm

≈ 30 metres

Therefore, Option (B) will be the answer.

0 0

2 years ago

Write (8a^-3)^-2/3 in simplest form<br> Please explain as if I were five years old

Natalija [7]

$\bf a^{\frac{{ n}}{{ m}}} \implies \sqrt[{ m}]{a^{ n}} \qquad \qquad
\sqrt[{ m}]{a^{ n}}\implies a^{\frac{{ n}}{{ m}}}
\\\\\\
a^{-{ n}} \implies \cfrac{1}{a^{ n}}\qquad \qquad
\cfrac{1}{a^{ n}}\implies a^{-{ n}}\\\\
-----------------------------\\\\$

$\bf (8a^{-3})^{-\frac{2}{3}}\qquad 8=2^3\implies (2^3a^{-3})^{-\frac{2}{3}}
\\\\\\
\textit{now, let's distribute the exponent}
\\\\\\
2^{\cfrac{}{}3\left( -\frac{2}{3} \right) }a^{-3\left( -\frac{2}{3} \right) }\implies 2^{-2}a^2\implies \cfrac{1}{2^2}\cdot a^2\implies \cfrac{a^2}{4}$

3 0

3 years ago