Answer:
r = -3
Step-by-step explanation:
-18=9+9r
take 9 from both sides -27=9r
9r=-27
divide both sides by 9 r=-3
Answer:
a) The number of ants in week three is shown through the following geometric progression: 500*1.1*1.1*1.1
b) 1.21
Step-by-step explanation:
We know that 500 ants are increasing at a rate of 10% every week which means that we can calculate the week one ants like this
500*1.1
Week two
500*1.1*1.1
and so on.
We write the following equation
500(1.1)^n where n is the number of weeks
We plug in 8 and then 6 for n in the equation above and get
500(1.1)^8=1071.79
500(1.1)^6=885.78
Divide and get that p=1.21
1 over 4, 2 over 4, 3 over 4 and 4 over 4
The formula for area of a circle is:
A = πr^2
where A is the area and r is the radius which is half the diameter.
Let's plug in values we know and solve:
A = 3.14(11 in)^2
A = 3.14(121 in^2)
A = 379.94 in^2
Answer:
11/8 or 1 3/8
Step-by-step explanation:
hope this helps