Answer:
i dont get it
Step-by-step explanation:
7(4x) = 28x
<em>Hope</em><em> </em><em>this</em><em> </em><em>helps</em><em> </em><em>:</em><em>)</em>
Answer:
22.5
Step-by-step explanation:
25% of 90 = 25/100 × 90
= 1/4 × 90 = 90/4 = 45/2 = 22 1/2 or 22.5
B(t)=50×e^2.5t
e^2.5t = 20
t= ln(20) / 2.5
set B(t)=1000 and solve for t via 1000=50e2.5t
20=e2.5t
ln(20)=2.5t
t=ln(20) / 2.5