The pesticide DDT is banned in most countries because of its long-lasting toxic effects on
humans and animals. The half-life of DDT is
approximately 15 years. A sample area of soil
contains 100 g of DDT. Determine the amount
of DDT in the soil after 70 years.

answer:

your answer is: c. 196 7/8 in^3.

the answer is:

the answer is:

to solve the problem, we need to remember the quotient of power property, it's defined by the following relation:

if we have a quotienf of powers that have the same base, we need to keep the same base and subtract the exponent of the denominator power to the exponent of the numerator power.

so, we are given the expression:

then, calculating we have:

hence, the answer is:

have a nice day!