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emilyjanae9961
01.11.2019 •
Mathematics
(03.07 mc)
monica measures the number of bacteria that are living on her petri dish. each day, she measures the amount of change in the number of bacteria. these amounts
create a geometric sequence. use the data in the table to determine the sum of the amounts of change in the bacteria after the seventh day.
day. amount of bac
1. 3
2. -6
3. 12
4. -24
answers
a. -15
b. 15
c. 127
d. 129
i think it is c. 127 but i am not sure right !
Solved
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Ответ:
129
Step-by-step explanation:
Each day, Monica measures the amount of change in the number of bacteria and this number from each day gives a geometric series
3, -6, 12, -24, having first term 3 and the common ratio -2.
Then the sum of the amount of change in the bacteria after the seventh day will be ( 3 - 6 + 12 - 24 + 48 - 96 + 192) = 129 (Answer)
Ответ:
Length of garden = (3x + 2) ft
Width of garden = (x + 5) ft
Area of garden = (3x² + 17x + 10) ft²
Step-by-step explanation:
Assume,
Side of tomato patch = x ft
so,
Length of garden = (3x + 2) ft
Width of garden = (x + 5) ft
Area of garden = (3x + 2)(x + 5)
Area of garden = (3x + 2)(x + 5)
Area of garden = (3x² + 17x + 10) ft²