The blue whale is the largest animal living on the earth. The average blue whale measures 100 feet long (30 meters) and weighs 3
1 answer:
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Answer:
Step-by-step explanation:
It is required to find the value of the missing exponent in the below value i.e.
Let the exponent is x.
Any number can be written in the scientific notation as :
a is a real number
b is any integer
In this case, the decimal is applied before 8 numbers. It means that the value of x is 8.
Answer: $19.6
Step-by-step explanation:
Linear function: f(x)=mx+c
, where m= rate of change in f(x) with respect to x.
c = Initial value.
Let c = Initial value of card , m= Charge per minute
x= Number of minutes calling time.
Then, 25.06= 38m+c (i)
21.03=69m+c (ii)
Eliminate (ii) from (i)
Put m in (i) , we get
i.e. f(x)=-0.13x+30
if x=80 then
f(80)= -0.13(80)+30
=-10.4+30
=19.6
Hence, the remaining credit after 80 minutes of calls = $19.6