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balandron [24]
3 years ago
6

Radium-226, a common isotope of radium, has a half-life of 1,620 years. How many grams of a 120-gram sample will remain after t

years?
Mathematics
2 answers:
Elina [12.6K]3 years ago
8 0

For the first part it’s A

For the second part it’s 115 years

ankoles [38]3 years ago
4 0

Answer:

P(t)=120(1/2)^t/1620

Step-by-step explanation:

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Help me please!!
statuscvo [17]

The question is incomplete without the diagram.

Answer:

Icosahedron + Tetrahedron

Octahedron +Tetrahedron

Step-by-step explanation:

Polyhedron 1: Solid:_Icosahedron__    Number: __1___

                       Solid:_Tetrahedron____     Number: _20____

Polyhedron 2: Solid:___Octahedron__    Number: __1___

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8 0
3 years ago
Read 2 more answers
What is the gcf of 25 and 90
Yuliya22 [10]
25 = 5^2
90 = 2 . 3 . 3 . 5

GCF is not as greedy as LCM.
GCF is just on a diet, so it takes the same number and the smallest amount.

25 and 90 both have 5.
5^2 or 5 ?
Take the smaller one.
GCF = 5
3 0
3 years ago
DUE TOMORROW ANSWER USING STEPS: When Tyrese fell asleep one night, the temperature was
fomenos

Answer:

40°F

Step-by-step explanation:

When Tyrese fell asleep one night, the temperature was 24°F.

When Tyrese awoke the next morning, the

temperature was -16°F.

Letting + denote a rise in

temperature and - denote a drop in temperature, what was the change in temperature from the time Tyrese fell asleep until the time he awoke?

The temperature dropped from a high temperature to a low one : from 24° to -16°

This can be expressed mathematically as 24 - (-16), with - denoting a drop in the temperature

=24-(-16)

=24+16

=40°F

Please mark me brainliest

4 0
3 years ago
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Select the expression that makes the equation true.
Reptile [31]

Answer:

A. -18*10^6

could you also mark me as brainliest?

4 0
4 years ago
Akio buys scissors for $3.79, tape for $2.57, and pens for $5.80. The sales tax is 6.25%. What is the amount of tax for Akio's p
Natasha_Volkova [10]
76 cents.  ($0.76) 
(sum of purchases = $12.16 divided by 0.0625 = .76)
6 0
3 years ago
Read 2 more answers
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