Answer:
-19
Step-by-step explanation:
-7x + (-12)
= 7x - 12 [ Note: +(-12) = - 12] .
= -19.
Answer:
48 students want to be an athlete
Step-by-step explanation:
.
Answer:
1.1289 grams ( approx )
Step-by-step explanation:
Since, the final quantity of an element which has half life of n periods,
Where,
P = initial quantity,
t = total number of periods,
Here, A = 1 gram, t = 1000 years, n = 5715 years,
By substituting the values,
( using calculator )
Hence, the initial quantity would be 1.1289 grams ( approx )
Between 21 and 22, and between 63 and 64. Hope this helps.