Answer:
A.) 3 different fertilizer treatment groups and 4 different watering schedules in each of three groups. Results in 12 different combinations of watering schedule and fertilizer.
B.)
Type of drug given and type of diet are the explanatory variables in the study. They are controlling the effect of medication and diet on changes in blood pressure
Separate into two inequalities.
1x < 3
1x > -15
Solve for x.
x < 3
x > -15
Answer:
let the number of ride ticket be x and that of the food ticket be y
x+y=32
1.50x+3.25y=90
y=32-x
1.50x+3.25(32-y)=90
1.50x+104-3.25y=90
-1.75x=90-104
-1.75x=-14
x=14/1.75
x=8
y=32-x
y=32-8=16
I would appreciate if my answer is chosen as a brainliest answer
For half lives
A=final amount
P=present amount
t=time in some units (this case it is days)
h=half life in days in th is case
so
given
we want 5% left
so A=5% of P or 5/100 of P or 1/20 of P or 0.05P
h=4.6
so
divide bth sides by P
take ln of both sides
divide both sides by
times both sides by 4.6
use your calculator
19.889t
so after about 20 days