Answer:
Jimmy gets $4.2 every hour he spends doing chores or homework, if jimmy made $42 last week, how many hours did he spend doing chores or homework that week?
x = hours
y = his earnings
The problem gives you X, so replace X witht he given vaule and solve for y:
y = -0.1x^2 + 4X
X = 40
y = -0.1(40)^2 +4(40)
y = -0.1(1600) + 160
y = -160 + 160
y = 0
Answer:
/98
Step-by-step explanation:
Answer:
The half-life in days is 6.3 days
Step-by-step explanation:
Here, we want to get the half-life
From what we have in the question, we can see that we have a first order decay relation
For a first order decay relation;
t1/2 = ln 2/k
That will be;
t1/2 = ln2/0.1095
t1/2 = 6.33
To the nearest tenth, this is 6.3 days