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3 years ago

What is 1.115 rounded to the nearest cent

Mathematics

1 answer:

Vanyuwa [196]3 years ago

7 0

Rounded to the nearest cent which I would assume is the nearest hundredth, the answer is 1.12

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Half-life of Po-210 is 140 days. If the initial mass of the sample is 5

Anna35 [415]

Answer:

$0.625kg$

Step-by-step explanation:

we are given half-life of PO-210 and the initial mass

we want to figure out the remaining mass after 420 days

in order to solve so we can consider the half-life formula given by

$\displaystyle f(t) = a {0.5}^{t/T}$

where:

f(t) is the remaining quantity of a substance after time t has elapsed.
a is the initial quantity of this substance.
T is the half-life

since it halves every 140 days our T is 140 and t is 420. as the initial mass of the sample is 5 our a is 5

thus substitute:

$\displaystyle f(420)=5\cdot{0.5}^{420/140}$

reduce fraction:

$\displaystyle f(420)=5\cdot{0.5}^{3}$

By using calculator we acquire:

$\displaystyle f(420)=0.625$

hence, the remaining sample after 420 days is 0.625 kg

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3 years ago

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olga_2 [115]

Answer:

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Step-by-step explanation:

Potential energy is the amount of energy that can be transfered to kinetic. This means that the higher person will have more potential energy.

4 0

3 years ago

Starter If x = 3, find y when: a) y = x b) y = 2x c) y = 5x - 2 d) y = x

gogolik [260]

Answer:

a. 3

b. 2(3) is 6

c. 5(3)-2 is 13

d.3

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2 years ago

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Click an item in the list or group of pictures at the bottom of the problem and, holding the button down; drag it into the corre

Alex777 [14]

8x^3 -5x^2 + 8x + 9+5x^3 + 3x^2 - 5x + 4 =
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Wewaii [24]

Solutions i found was m=4 or m=-2

6 0

3 years ago

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What is 1.115 rounded to the nearest cent​

What is 1.115 rounded to the nearest cent