Jodie ran at an average speed of 8 km/h for 30 minutes. How far did she run in km?
1 answer:
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Answer:
a) 0.4164
Step-by-step explanation:
Mean lifespan (μ) = 18.8 days
Standard deviation (σ) = 2 days
For any given lifespan 'X', the z-score is:
For X=12.04 days:
A z-score of -3.38 falls in the 0.036-th percentile of a normal distribution.
For X=18.38 days:
A z-score of -3.38 falls in the 41.68th percentile of a normal distribution.
The probability that a butterfly lives between 12.04 and 18.38 days is
Answer:
A) 40
B) $ 15
Step-by-step explanation:
<u>A)An equation for the number of 30-day periods until the value of the gift cards will be equal</u>
Let x be the number of time periods for which the gift card is not used, then
For the gift card $ 155 if it is not used for x periods, then the amount that will be lost is
155 - 3.50 x---------------------(1)
For the gift card $ 135 if it is not used for x periods, then the amount that will be lost is
135 - 3x---------------------- (2)
Now when both the amount lost is equal
solving the equation, we get
20 = 0.5x
x = 40
Thus the value of gift cards will be equal for 40 ,30 day periods.
<u>B)The value of each card be when they have equal value</u>
The two cards will have equal value after 40 30 day periods, this denotes that at this time, the value of each card will be equal.
Then
substituting x = 40, we get
when they have equal value, the value of each card will be $15