Given :
Service cost , c = $40.
Amount paid for each message , m = $0.02 .
To Find :
Equation represents the total cost C in dollars for a month when eric send t text message.
Solution :
Let , total cost be C .
It is an linear equation with slope equal to 0.02 and y-intercept equal to 40.
So ,

Hence, this is the required solution.
Answer:
$388.50
Step-by-step explanation:
42 tins
$9.25/tin

So, they raised $388.50
Answer:
x = 15, x = 10
Step-by-step explanation:
Answer:
The margin of error for a 90% confidence interval is 16.4
Step-by-step explanation:
We are given the following in the question:
Sample size, n = 25
Standard deviation = 50

Margin of error =

Putting the values, we get,

Thus, the margin of error for a 90% confidence interval is 16.4
Answer:
21.84
Step-by-step explanation:
5.46
/
.25
21.84