<u>Answer:</u>
For 500 minutes, the costs of the two plans are equal.
<u>Step-by-step explanation:</u>
Let t be the time of calls in minutes; and
c be the cost of the monthly plan.
<u>1st plan:</u>
<u>2nd plan:</u>
Setting the monthly costs equal to each other to get:
when call minutes , then the cost of the plans are:
1st plan:
2nd plan:
Answer:
Step-by-step explanation:
1. Given, u = 20 , x = 4 , y = 7 , z = 10
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2.
Multiplying or dividing a positive integer by any negative integer gives a negative integer
= - 8
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Hope I helped!
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Answer:
Each person will get 1.25 or 1 1/4 cereal bars.
Step-by-step explanation:
5/4 = 1.25 = 1 1/4
8 bills of $5 and 6 bills of $1 which equals $46 worth
Answer:
H0 : μ = 38
H 1 : μ < 38
Test statistic = - 1.11
Pvalue = 0.13
We conclude that there is no significant evidence to support the claim that mean caffeine content is less than 38 milligram.
Step-by-step explanation:
H0 : μ = 38
H 1 : μ < 38
The test statistic :
(xbar - μ) ÷ (s / sqrt (n))
(36.1 - 38) ÷ (10.8 / sqrt(40))
-1.9 ÷ 1.7076299
= - 1.113
= - 1.11 ( 2 decimal places)
α = 0.10
Using the value calculator :
P(Z < - 1.113) = 0.13285
Pvalue = 0.13285
Pvalue = 0.13 ( 2 decimal places)
Reject the Null if Pvalue < α
Since; 0.13285 > 0.01 ; We fail to reject the Null
We conclude that there is no significant evidence to support the claim that mean caffeine content is less than 38 milligram.