For a snack. lali ate 2/4 of an apple. makeo ate 3/4 of a peanut butter sandwhich. which girl ate more

Mathematics

1 answer:

BARSIC [14]3 years ago

5 0

.makeo because 4 is how much their is and 3 and 2 are how much they at there for 3 is morn than 2 so makeo

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-4/9 repeating decimal

Liula [17]

Yes that is a repeating decimal the answer would be -0.4444444.. and so on.

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3 years ago

Jennifer can clean her room 2 hours, while John can clean the same room in 5 hours. How many hours would it take for them to cle

True [87]

For 1 hour:
- Jennifer can clean 1/2 of her room;
- John cal clean 1/5 of her room.
Both can clean: 1/2 + 1/5 = 5/10 + 2/10 = 7/10
1 hour -------- 7/10
x hours---------- 1
x = 1 : 7/10 = 10/7 h = 1.42857 h ( or 1 h 25 min 43 s )

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3 years ago

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Dubnium-262 has a half-life of 34 s. How long will it take for 500.0 grams to

dmitriy555 [2]

Answer:

the time taken for the radioactive element to decay to 1 g is 304.8 s.

Step-by-step explanation:

Given;

half-life of the given Dubnium = 34 s

initial mass of the given Dubnium, m₀ = 500 grams

final mass of the element, mf = 1 g

The time taken for the radioactive element to decay to its final mass is calculated as follows;

$1 = 500 (0.5)^{\frac{t}{34}} \\\\\frac{1}{500} = (0.5)^{\frac{t}{34}}\\\\log(\frac{1}{500}) = log [(0.5)^{\frac{t}{34}}]\\\\log(\frac{1}{500}) = \frac{t}{34} log(0.5)\\\\-2.699 = \frac{t}{34} (-0.301)\\\\t = \frac{2.699 \times 34}{0.301} \\\\t = 304.8 \ s$