Answer: 4 years
Step-by-step explanation:
A(0) has to be amount at start. Assume that's 5mg
Then A(t) = 5×(0.5)^(0.25t) = 5×2^(-t/4),
(also known as 5 exp(-λ t) with λ = ln(2)/4, incidentally).
We need to such that A(t) = 2.5mg, or 2^(-t/4) is 1/2, which happens when -t/4 is -1, or t is 4.
Answer:
Step-by-step explanation:
B
First, we need to find the length of the skateboard in feet.
Since each skateboard is 2 1/2 feet long, we can multiply that by 4 to get 10.
2 1/2 * 4 = 10
We then convert this into yards.
One yard is equal to 3 feet, so we should divide 10 by 3 to get our answer.
10/3=3 1/10
Our final answer is 3 1/10 yards.
Answer:
0 ( zero) is a number, and the numerical digit used to represent that number in numerals. It fulfills a central role in mathematics as the additive identity of the integers, real numbers, and many other algebraic structures. As a digit, 0 is used as a placeholder in place value systems.
