8x+800-3=837
8x=837-797
8x=40
x=40/8
x=5
the answer is three divide by ten
Answer: The answer would be D, The number of dances paco's daughter plans to perform.
Step-by-step explanation:
Answer:
<h3>108.83<em>yd²</em></h3>
Use SAS to solve for the area:
((A x B) x sin C) / 2
A: Side 1
B: side 2
C: angle in-between
Answer:
(a) A = (20mg)/(2^(t/30))
(b) 12.6mg
(c) 129.6years
Step-by-step explanation:
To calculate the amount remaining after a number of half-lives, n, we can make use of:

Where A = amount remaining
B = initial amount

(a) A = (20mg)/(2^(t/30))
(b) Mass after 20years
A = (20mg)/(2^(20/30)) ≈ 12.6mg
(c) After how long will only 1mg remain:
1mg = (20mg)/(2^(t/30))

Taking log of both sides we have:
Log(20) = (t/30)log(2)
t/30 = (log(20))/(log(2)) ≈ 4.3
t/30 = 4.3
t = 30 x 4.3 ≈ 129.6years.