(4+7-1÷5)÷1.2+2.5×3-0.2
1 answer:
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The question is incomplete. Here is the complete question:
Val rented a bicycle while she was on vacation. She paid a flat rental fee of f dollars, plus $8.50 each day. The total cost at the end of her vacation was t dollars. Let d represent the number of days Val rented the bicycle. Write an equation representing the total cost at the end of her vacation.
Answer:
Step-by-step explanation:
Given:
Flat rental fee =
Variable fee per day = $8.50
Total cost at the end vacation =
Number of days of her vacation =
Using unitary method, we can find the variable fee for 'd' days.
1 day variable fee = $8.50
Therefore, 'd' days variable fee =
Total cost at the end of her vacation can be obtained by adding the fixed rental fee and the variable fee obtained for the given number of days.
Now, total cost is given as:
Total cost = Flat rental fee + Variable fee
Substituting all the variables and framing above in the form of an equation, we get:
Therefore, the equation representing the total cost at the end of her vacation is
Answer:
a) Hypothesis:
:
:
Where represent the average nose size of male and female respectively.
In words,
: Males and females have the same size noses, on average.
: Males have bigger noses than females, on average.
b) We have evidence that males have bigger noses than females, on average.
Step-by-step explanation:
a) The study wishes to investigate if males have bigger noses than females, on average. By hypothesis test, the null hypothesis is the hypothesis we usually want to reject. That is, we want to prove that the male and female nose sizes are not the same. Hence, the null hypothesis will assume equality. And we state that:
: Males and females have the same size noses, on average.
: Males have bigger noses than females, on average.
b) We are told that the p-value < 0.01. In general, if the assume 5% as the level of significance (). The decision is:
If p-value is less than the , the test is significant otherwise, the test is insignificant.
The given p-value is less than 5% => 0.05, therefore, we say the test is significant. and we conclude that, we have evidence that males have bigger noses than females, on average.