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My name is Ann [436]
3 years ago
9

Audrey had $20 and brought him for $1.10, a soda for $.99, and a bag of chips for $3.98. how much money does she have left

Mathematics
1 answer:
topjm [15]3 years ago
3 0
 The correct answwere is that he  has $14.13 left 
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Answer:

If ‘a’ is the initial population of the Zebra mussels, then every six months, the population of Zebra mussels quadruples, i.e. it becomes 4a. In t years, i.e. in 2t intervals of 6 months each, the population of Zebra mussels can be computed with the help of a geometric series a, ar, ar2, ar3, …. arn-1 ( the series being finite with n terms) where a is the 1st term , r is the common ratio and n is the number of terms in the series..

Here, in 2t years, there will be 2t + 1 terms in the geometric series including the initial term. Thus in the above series, a = 10, r = 4 and n = 2t + 1. Then the population of the Zebra mussels after 2t years is the (2t +1)st term of the geometric series I.e. 10* ( 42t)                  

In 15 months, t = 15/12 = 1.25. Then the population of Zebra mussels after 15 months will be 10*(42.5 ) = 10 * 25 = 320

If after t years, the population of the Zebra mussels become 1 million , then we have

1000000 = 10 * (42t) or, 100000= 42t or,105 = 42t    Taking logarithms of both sides, we have 5 log 10 = 2t log 4 or, t = (5log10)/(2log4) = 5/1.20 years or (5/1.20) * 12 months = 50 months, i.e. 4 years and 2 months.

Step-by-step explanation:

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2 years ago
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I'll give brainliest!! Also 40 points!
ki77a [65]

Well, if you have a word problem for example:

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Any real numbers , I think
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There7 dogs and 7 rows how many are there
faust18 [17]

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7 x 7 = 49

Step-by-step explanation:

hope it helps, please mark as brainliest please

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