To find the area of a triangle, you need the formula . A= b*h divided by 2
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

.
Answer:
4
Step-by-step explanation:
C because a is incorrect and so is b and d
Answer:
61%
Step-by-step explanation:
Multiply the fraction by 100%.
76/125 × 100% = (7600/125)% = 60.8% ≈ 61%