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3 years ago

Pointssss

Mathematics

1 answer:

lozanna [386]3 years ago

7 0

Answer:

This might be the answer not sure

Step-by-step explanation:

if it goes down 0.8 % every year it would be 1392

this is what I did 1,450−0.8%−0.8%−0.8%−0.8%

−0.8% I did -0.8% for every year i did 5 times for 5 years

so that the value but if u want the really accurate one then the answer is 1,392.9206056485 i hate myself for doing that but yeah thats it

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Find the missing side length

Mashcka [7]

It’s not 3 or 4 so I think 2

7 0

3 years ago

What are the correct answers?

Delvig [45]

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Glad I could help

8 0

2 years ago

Question 3 (1 point) Co-60 has a half life of 5.3 years. If a pellet that has been in storage for 26.5 years contains 14.5g of C

Zarrin [17]

Answer:

464 grams.

Step-by-step explanation:

Amount of substance:

The amount of substance after t years is given by an equation in the following format:

$A(t) = A(0)(1-r)^t$

In which A(0) is the initial amount and r is the decay rate, as a decimal.

Co-60 has a half life of 5.3 years.

This means that:

$A(5.3) = 0.5A(0)$

We use this to find r. So

$A(t) = A(0)(1-r)^t$

$0.5A(0) = A(0)(1-r)^{5.3}$

$(1-r)^{5.3} = 0.5$

$\sqrt[5.3]{(1-r)^{5.3}} = \sqrt[5.3]{0.5}$

$1 - r = 0.5^{\frac{1}{5.3}}$

$1 - r = 0.8774$

$A(t) = A(0)(0.8774)^{t}$

If a pellet that has been in storage for 26.5 years contains 14.5g of Co-60, how much of this radioisotope was present when the pellet was put in storage?

We have that $A(26.5) = 14.5$ , and use this to find A(0). So

$A(t) = A(0)(0.8774)^{t}$

$14.5 = A(0)(0.8774)^{26.5}$

$A(0) = \frac{14.5}{(0.8774)^{26.5}}$

[tex]A(0) = 464[tex]

464 grams.

3 0

3 years ago

If f:X is 3x + b and ff(2) = 12, find the value of b

Tamiku [17]

Answer:

$b =6$

Step-by-step explanation:

Given

$f(x) =3x + b$

$f(2) = 12$

Required

Find b

$f(2) = 12$ implies that:

$12 = 3 * 2 + b$

$12 = 6 + b$

Collect like terms

$b = 12 - 6$

$b =6$

5 0

3 years ago

PLZ HELP!!!!!!! NO LINKS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Studentka2010 [4]

Answer:

i can't see clear

4 0

2 years ago