To model half-life, use the formula

. Here,

is the amount remaining after a length of time

.

is the amount that you start with.

is the half-life. You plug in 50 for

, 10 for

, and 25 for

. You get

.
The cosine of 1.137020412 degrees is 0.4204.
Answer:
The answer is C trust me I did this
Answer:
A constant in math is a value that doesn't change. Instead, it's a fixed value. All numbers are considered constant terms.
Answer:
maybe rotation.........i think....