For his total monthly bill to be under a twenty dollars he could make a 149 calls
20-5=15
15/.10=150
150-1=149
15-.10=14.9
14.9+5=19.9
So the maximum number of calls he can make is 149 a month
Answer:
i think 6 hope it helps you
have a nice day
Answer:
.8 or 4/5 cell phones per day
(that's kinda weird, 4/5 of a cell phone...)
Step-by-step explanation:
Answer:
∠1=∠3=134° ∠2=∠4=180-∠3=180-134=46°
Step-by-step explanation:
Answer:
Option a
Step-by-step explanation:
Given two normal distribution samples
I group has 106 as mean and 8.5 as std deviation with sample size = 60
II group has 121 as mean and 6.3 as std deviation with sample size =38
We find mean difference =-15
For margin of error finding, we have to find the combined std error for the difference
Variance of difference = Sum of variances
STd error for difference = 1.50
Hence for 99% margin of error =2.58(1.50)
= 3.87
