Plutonium-240 decays according to the function where q represents the quantity remaining after t years and k is the decay constant, 0. how long will it take 24 grams of plutonium-240 to decay to 20 grams?

1657.47 years

Step-by-step explanation:

Let's find the answer by using the decay formula:

where:

Q=quantity remaining after 't' years

q=initial amount

k=decay constant

t=time in years

Using the information provided by the problem we have:

In conclusion, it will take 1657.47 years.

where r the answers

step-by-step explanation:

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!