Answer:
this answer is an estimation since i couldn't find an exact answer
Answer:
16. 7
17. 12
18. 4
19. 32
20. 10
Step-by-step explanation:
-8≥-5x+2>-38
-10≥-5x>-40
2≤x<8 (when divided by a negative number, the sign changes from ≥ or > to ≤ or <)
so x is between 2 (include 2, a solid dot) and 8 (doesn't include 8, a hollow bubble)
the third choice is correct.
Answer: n = 2401
Step-by-step explanation:
Given;
Confidence level = 2% - 99%
n = ? ( which is the sample size is unknown ).
Solution:
Where;
n = [z/E]^2*pq
Since no known value for ( p ) estimate is given, the "least biased" estimate is p = 1/2
Substituting the given data into the formula.
n = [1.96/0.02]^2(1/2)(1/2)
n = 2401
The minimum number of truck drivers the statistician needs to sample for an accurate result is 2401
Answer:
Step-by-step explanation:
We will use the pattern f(x)= a(b)^t where a is the initial value, b is the base of the exponent. All these questions are about exponent function
A) Number of trout fish in the pound = 7 , it means a =7
population increases double every year. It means b=2
f(x)= a(b)^t
f(x)=7(2)^t
B) Cost of machine = $3000
The value depreciated every year = 7%
It means 100%-7%= 93% which is equal to 0.93
Therefore,
a = 3000
b = 0.93
f(x)= a(b)^t
f(x)=3000(0.93)^t
C) Initial population of a colony of ants = 300
The number of ants increase at a rate of 1.5%
It means 100%+1.5%=101.5%
101.5% = 1.015
Therefore,
a= 300
b = 1.015
f(x)= a(b)^t
f(x)=300(1.015)^t
D) A research laboratory is testing a new vaccine on 300 infected cells
The decay rate is 1.5% per minute
It means 100%-1.5% =98.5%
98.5% = 0.985
Therefore,
a = 300
b = 0.985
f(x)= a(b)^t
f(x)= 300(0.985)^t ....