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Virty [35]
2 years ago
11

An element with a mass of 630 grams decays by 30% per minute. To the nearest minute, how long will it be untill there are 30 gra

ms of the element remaining?
Mathematics
1 answer:
nataly862011 [7]2 years ago
6 0

Answer:

It should take somewhere between 8 to 9 minutes to decay until there are 30 grams remaining.

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A 6 inch-tall plant grew 3/4 of an inch week and twice as much the following week. How tall is the plant now?
Alla [95]
8.25 inches once you multiply the 3/4 by 2 and add that and also add the 3/4 from the previous week you’ll get your answer
7 0
2 years ago
Read 2 more answers
If e = 9 cm and f = 40 cm, what is the length of g?
rewona [7]

(9,40,41) is a Pythagorean Triple, farther down the list than teachers usually venture.

Answer: D. 41 cm

There's a subset of Pythagorean Triples where the long leg is one less than the hypotenuse,

a^2+b^2 = (b+1)^2

a^2 + b^2 = b^2 + 2b +1

a^2=2b+1

So we get one for every odd number, since the square of an odd number is odd and the square of an even number is even.

b = (a^2 - 1)/2

a=3, b=(3^2-1)/2=4, c=b+1=5

a=5, b=(5^2-1)/2 =12, c = 13

a=7, b=24, c=25

a=9, b=40, c=41

a=11, b=60, c=61

a=13, b=84, c=85

It's good to be able to recognize Pythagorean Triples when we see them.  

Otherwise we'd have to work the calculator:

√(9² + 40²) = √1681 = 41

8 0
2 years ago
For every 6kg a child's weight, pediatricians prescribe 17mg of acetaminophen. If Lexie weighs 48 kg, how many milligrams of the
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The answer will be 136mg
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8*17=136mg
5 0
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Write an expression that can be used to multiply 6 times 198 mentally
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100×6

6×90

6×8

add them together

community property
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1 year ago
Which shapes have the same volume as the given rectangular prism?<br><br>base area = 50 cm^2​
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Answer:The first one

Step-by-step explanation:

V rectangular prism = Area of the base *5

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2 years ago
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