3 years ago

A substance has a half-life of 6 years. If 20 pounds are present initially, how much will remain after 2 years?

Mathematics

1 answer:

Vladimir [108]3 years ago

8 0

Answer:

16.66pound

Step-by-step explanation:

roughly 16.66 pound

if in 6 years it become half which is =10

then 10÷6= 1.67

then 1.67 pound is decayed every year.

in 2 years it decay 1.67×2= 3.34

so , the remaining is 20-3.34=16.66pound

You might be interested in

The graph of h (x) =|x- 10|+ 6 is shown. On which interval is this graph increasing? A. (–∞, 6) B. (–∞, 10) C. (6, ∞) D. (10, ∞)

gladu [14]

Answer:

Step-by-step explanation:

The graph increases when y hits its lowest point and then starts to go back up again. In this case, when x = 10, it starts to go back up again.

7 0

3 years ago

What is the value of x^2 - 3y + 5x + 2 whenx = 7 and y = 4?

PilotLPTM [1.2K]

Answer:

Step-by-step explanation:

$x^2 - 3y + 5x + 2 \\ \\ = {7}^{2} - 3(4) + 5(7) + 2 \\ \\ = 49 - 12 + 35 + 2 \\ \\ = 74$

4 0

2 years ago

Use the vertex formula to find the vertex of the quadratic function f(x) = -x2 + 4x - 8.

Irina18 [472]

The vertex of f(x)=-x2+4x-8 is (2, -4)

8 0

2 years ago

What is 13/2 - 2/13.

skad [1K]

13/2 = 6.5
2/13 = 015
6.5-0.15 = 6.35

4 0

2 years ago

Giselle works as a carpenter and as a blacksmith. She earns $20\$20 $20 dollar sign, 20 per hour as a carpenter and $25\$25 $25

malfutka [58]

C = # of carpenter hrs , b = # of blacksmith hrs

c + b = 30...c = 30 - b
20c + 25b = 690

20(30 - b) + 25b = 690
600 - 20b + 25b = 690
-20b + 25b = 690 - 600
5b = 90
b = 90/5
b = 18 <== hrs worked as blacksmith

c + b = 30
c + 18 = 30
c = 30 - 18
c = 12 <== hrs worked as carpenter

7 0

3 years ago