Ally's science class was looking at bacteria through a microscope. Ally's teacher said some bacteria can be as small as 0.00365
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Answer:
Kim had bought 12 sandwiches.
Step-by-step explanation:
Given:
Amount spend at Midtown Dine = $35
Amount spend on large order of potato salad = $5
Cost of each sandwich = $2.5
We need to find the number of sandwich did Kim bought.
Solution:
Let the number of sandwich Kim bought be 'x'.
Now we know that;
Amount spend at Midtown Dine is equal to sum of Amount spend on large order of potato salad and number of sandwich Kim bought multiplied by Cost of each sandwich.
framing in equation form we get;
Subtracting both side by 5 we get;
Dividing both side by 2.5 we get;
Hence Kim had bought 12 sandwiches.
Let value intially be = P
Then it is decreased by 20 %.
So 20% of P =
So after 1 year value is decreased by 0.2P
so value after 1 year will be = P - 0.2P (as its decreased so we will subtract 0.2P from original value P) = 0.8P-------------------------------------(1)
Similarly for 2nd year, this value 0.8P will again be decreased by 20 %
so 20% of 0.8P =
So after 2 years value is decreased by (0.2)(0.8P)
so value after 2 years will be = 0.8P - 0.2(0.8P)
taking 0.8P common out we get 0.8P(1-0.2)
= 0.8P(0.8)
-------------------------(2)
Similarly after 3 years, this value will again be decreased by 20 %
so 20% of
So after 3 years value is decreased by
so value after 3 years will be =
taking common out we get
-----------------------(3)
so from (1), (2), (3) we can see the following pattern
value after 1 year is P(0.8) or
value after 2 years is
value after 3 years is
so value after x years will be ( whatever is the year, that is raised to power on 0.8)
So function is best described by exponential model
where y is the value after x years
so thats the final answer