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Varvara68 [4.7K]
2 years ago
10

A swimming pool had 2.5 million liters of water in it. Some water evaporated, and then the pool only had 2 million liters of wat

er in it . What percent of the water evaporated?
Mathematics
1 answer:
Phoenix [80]2 years ago
8 0

Answer:

20%

Step-by-step explanation:

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Please help with this question
alekssr [168]

Step-by-step explanation:

so, that means we want to find the time t (days) after which N = No/2

because "half-life" means the amount of time until half of the substance has disappeared (or transformed into something else).

so, we have

No/2 = No × e^(-0.1481×t)

No = 2× No × e^(-0.1481×t)

1 = 2×e^(‐0.1481×t)

1/2 = 0.5 = e^(-0.1481×t)

ln(0.5) = -0.1481×t

t = ln(0.5)/-0.1481 = 4.680264555... ≈ 4.7 days

8 0
1 year ago
A spherical ball has a radius of 4 inches. What is the volume of this sphere, to the
stealth61 [152]

Answer:

V = 267.9 in^3

Step-by-step explanation:

V = 4/3 * (pi) * r^3

V = 4/3 * 3.14 * 4^3

V = 4/3 * 3.14 * 64

V = 256/3 * 3.14

V = 803.84/3

7 0
2 years ago
Lan parents asked him to create a budget For his 1000 monthly income he determines That he would like to save the remaining amou
LiRa [457]

Answer:

for an equal income to everyone you can do 250 to each person adding up to 750 then 250 to save

Step-by-step explanation:

6 0
3 years ago
Please write eight facts about: The Flow of Energy in a Food Chain.
Elan Coil [88]

Answer:

Always linear...

Decreases with successive trophic level

5 0
2 years ago
Read 2 more answers
find the dimensions of a rectangle whose width is 5 miles less than its length and whose area is 66 square miles
Lyrx [107]
A = l * w
66 = l * (l - 5)
66 = l^{2}-5l
0 = l^{2}-5l - 66

l = 11 or 6 check which works.

A = 11 * 6, which fits.

length = 11 miles
width = 5 miles
4 0
3 years ago
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